|
|
|
CATEGORY |
RECOMMENDATION |
PISTON |
MX7655 |
FORGED TOMEI PISTONS |
MX8260 |
The stock pistons can withstand up to around 500ps. However, using the 7655 & 8260 turbo at 1.6kg /cm² (22.8psi) boost can cause the pistons to melt and/or the compression to drop. Thus for high boost settings, forged pistons should be installed in conjunction with a high performance head gasket. |
CONNECTING RODS |
MX7655 |
RECOMMENDED: TOMEI
H-Beam Connecting Rods |
MX8260 |
The stock connecting rods can withstand up to around 500ps. However, high performance connecting rods are recommended for higher power outputs. |
BOOST SETTING |
MX7655 |
1.6kg/cm²(22.8psi) with a boost controller |
MX8260 |
The ARMS 7960 and 8260 turbos are capable of producing 580PS and 650PS respectively at 1.6 kg /cm² (22.8psi) boost. At these settings, the stock gaskets and engine internals become it is highly recommended for the head gasket to be upgraded at the very least (MAX 500ps with 7655 at 1.1~1.2kg/cm²(15.6~17.1psi) boost). With forged pistons and depending upon the vehicle, 1.5~1.6kg/cm²(21.3~22.8psi) is possible. Ensure boost settings are adjusted with the car in 4th/5th gear and not at lower gears. At lower gears there is significantly less load, resulting in incorrect boost settings. (At higher RPMs, beyond peak boost, it is common for the boost drop/tail-off) |
POWER |
MX7655 |
580ps |
MX8260 |
650ps |
MX7655 |
The stock engine can produce up to around 500PS at 1.1~1.2kg/cm² (15.6~17.1psi) of boost. The head gasket will have to be upgraded to a metal type for this to be possible. If the pistons are also upgraded (to forged pistons), the boost can be increased up to 1.6kg/cm² for more power gains. |
|
MX8260 |
This turbocharger is optimized for tuned engines. Accordingly, it is not recommended for installation on a stock engine as the internals may not be able to withstand the significantly increased load/power potential. |
|
CAMSHAFTS |
MX7655 |
TOMEI PONCAM type-B |
MX8260 |
TOMEI PROCAM 270°-10.25mm |
The standard camshafts aren’t capable of providing the required exhaust pressure to maximize the performance gains from the bigger turbo. Therefore, upgrading the camshafts is highly recommended. |
HEAD GASKET |
MX7655 |
UPGRADE TO METAL TYPE Recommended: TOMEI Metal Gasket Combination |
MX8260 |
Increasing boost will naturally increase combustion pressure. To maintain a secure seal at high boost is it strongly recommended that you upgrade to a high performance head gasket with superior sealing. Changing head gaskets will also allow you to adjust the compression ratio. RB26 engines have been known to have weak/think gaskets on the throttle as well as on the intake and exhausts manifolds. These should also be upgraded at the same time. |
INJECTOR CAPACITY |
MX7655 |
600cc or larger |
MX8260 |
700cc or larger |
Target horse power×5.9÷No. of cylinders = required injector capacity per cylinder. Injectors should be operating at around 80〜90% capacity to maintain good fuel atomization. |
FUEL PUMP CAPACITY |
MX7655 |
240L/h or larger (@ 3kg/cm²): |
MX8260 |
Injector capacity×No. of cylinders×0.06 = required fuel pump capacity Fuel pumps should be operating at around 80〜90% capacity to maintain good fuel flow |
FUEL PRESSURE REGULATOR |
MX7655 |
Adjustable type, TOMEI TYPE-S |
MX8260 |
Adjustable type, TOMEI TYPE-L |
Fuel pressure should be adjusted according to the fuel pump. Initial/atmospheric pressure should be set to 3kg/cm2. |
AIR CLEANER |
MX7655 |
High efficiency type |
MX8260 |
Bolt-on replacement upgrade recommended if retaining MAF sensor |
MAF |
MX7655 |
NISMO MAF or MAF DELETE |
MX8260 |
MAF delete |
Around 450ps-480ps is the maximum for a stock MAF. NISMO MAFs can handle upto around 700ps. |
SUCTION PIPE |
MX7655 |
High efficiency type |
MX8260 |
Upgrading the suction pipe significantly improves air flow efficiency compared to the stock suction pipe which can sometimes warp during high boost. |
INTERCOOLER |
MX7655 |
High flow type |
MX8260 |
In general, pressurized air from the turbo is compressed and forced into the engine. However, the air from the has low oxygen content (low density) as the air is hot and expanded. This has an adverse effect on combustion efficiency and subsequently on performance. By installing an intercooler between the turbo and the engine, it allows the compressed air to be cooled before it enters the combustion chamber. This results in improved engine performance as the colder denser air improves combustion efficiency. |
BLOW-OFF VALVE |
MX7655 |
High performance type (not vent to atmosphere) |
MX8260 |
When the throttle closes, the pressurized air from the turbo has no where to go and is forced back towards the turbo. This puts significant stress on the compressor wheel and in some instances can be enough to stall it all together. To prevent this, a blow-off valve is installed between the turbo and throttle to recirculate the air to between the MAF and turbo. However, using a stock blow off valve for high boost setups will cause it to relief the boost prematurely, resulting in reduced response and power. Therefore it is highly recommended that you upgrade the blow-off valve to a high performance unit. It should be noted that whilst both vent-to-atmosphere type and recirculation type blow-off valve setups serve the same function of relieving boost, the former will often cause the MAF to give false readings. For this reason it is recommended that you recirculate the excess boost. |
EXHAUST MANIFOLD |
MX7655 |
TOMEI EXPREME or similar |
MX8260 |
By upgrading your camshafts, you can increase the exhaust pressure. To take advantage of this replacing the manifold is highly recommended. This will help spool the turbos more efficiently for a smoother and more responsive boost |
TURBO OUTLET |
MX7655 |
TOMEI EXPREME or similar |
MX8260 |
The stock outlet pipes have a restricted flow. In particular, at higher engine speeds (RPM), the narrower stock outlet pipes cause the exhaust gasses to build up within them, leading to unstable boost. With the larger outlet pipes, exhaust gasses can flow more efficiently, stabilizing boost and improving the overall response of the turbo |
FRONT PIPE |
MX7655 |
TOMEI EXPREME Ti or similar |
MX8260 |
As with the outlet, smooth air flow will improve the response, leading to better performance .overall |
CATALYTIC CONVERTER |
MX7655 |
Metal catalytic converter |
MX8260 |
This allow for high exhaust flow efficiency whilst still being able to reduce emissions. |
EXHAUST |
MX7655 |
Around Φ80mm main pipe diameter |
MX8260 |
As with the outlet, smooth air flow will improve response and performance. |
ECU |
MX7655 |
To suit the car's setup requirements. |
MX8260 |
The ECU will need to be remapped after installation to suit the vehicles specifications/intended use. |
SPARK PLUG |
MX7655 |
No. 8 / 9 or similar |
MX8260 |
The increase in power also means an increase combustion temperature. This can cause the stock spark plugs to melt. Heat range 8 or 9 spark plugs are generally recommended, although you should conduct an individual inspection to determine the best type for your vehicle. |
|
|
|
|
|
CATEGORY |
RECOMMENDATION |
BOOST SETTING |
STOCK ENGINE |
1.0~1.2kgf/cm²(14.2~17.1psi) with boost controller |
UPGRADED
PISTONS ETC. |
1.6kgf/cm²(22.8psi) with boost controller |
|
POWER |
STOCK ENGINE |
350~370ps |
UPGRADED
PISTONS ETC. |
450ps |
|
CAMSHAFTS |
STOCK ENGINE |
Stock / longer duration Recommended: TOMEI PONCAM |
UPGRADED
PISTONS ETC. |
Longer duration cams required Recommended: TOMEI PONCAM |
|
HEAD GASKET |
STOCK ENGINE |
High performance, metal type Recommended: TOMEI METAL HEAD GASKET |
UPGRADED
PISTONS ETC. |
|
FUEL PUMP |
STOCK ENGINE |
240L/h or larger
Injector capacity x No. of cylinders x0.06=required fuel pump capacity. |
UPGRADED
PISTONS ETC. |
|
INJECTOR CAPACITY |
STOCK ENGINE |
550cc or larger
Target horse power x 5.9÷No. of cylinders=required injector capacity |
UPGRADED
PISTONS ETC. |
|
FUEL PRESSURE REGULATOR |
STOCK ENGINE |
Adjustable type
Recommended: TOMEI TYPE-S |
UPGRADED
PISTONS ETC. |
|
AIR CLEANER |
STOCK ENGINE |
High flow type |
UPGRADED
PISTONS ETC. |
|
SUCTION PIPE |
STOCK ENGINE |
Stock or high flow type |
UPGRADED
PISTONS ETC. |
High flow type |
|
INTERCOOLER |
STOCK ENGINE |
Stock or high flow type |
UPGRADED
PISTONS ETC. |
High flow type |
|
EXHAUST MANIFOLD |
STOCK ENGINE |
Stock |
UPGRADED
PISTONS ETC. |
Stock or high flow type |
|
OUTLET/FRONT PIPE |
STOCK ENGINE |
Stock or high flow type Recommended: TOMEI EXPREME |
UPGRADED
PISTONS ETC. |
High flow type Recommended: TOMEI EXPREME |
|
CATALYTIC CONVERTER |
STOCK ENGINE |
Stock or high flow type |
UPGRADED
PISTONS ETC. |
|
EXHAUST |
STOCK ENGINE |
Around Φ80-Φ90 main section |
UPGRADED
PISTONS ETC. |
|
ECU |
STOCK ENGINE |
Vehicle/setup specific |
UPGRADED
PISTONS ETC. |
|
BLOW-OFF VALVE |
STOCK ENGINE |
High performance type, not vent to atmosphere |
UPGRADED
PISTONS ETC. |
|
SPARK PLUG |
STOCK ENGINE |
No. 8 / 9 or similar |
UPGRADED
PISTONS ETC. |
|
|
|
|
|
CATEGORY |
RECOMMENDATION |
BOOST SETTING |
MX7960 |
1.6kg/cm²(22.8psi)with boost controller |
MX8270 |
The 7960 / 8270 turbo is capable of making over 400ps / 450ps respectively @ 1.6kg/cm²(22.8psi) boost. For a stock engine, it is recommended that you at least upgrade the head gasket to a metal type. With the stock setup the engine should be able to withstand up to around 330ps @ 1.0〜1.1kg/cm² (14.2〜15.6psi)boost. With the upgraded gasket, 1.3kg/cm²(18.49psi)boost is possible and with forged pistons, 1.5〜1.6kg/cm2 (21.3〜22.8psi)can be achieved. Note that boost settings should be made in 4th/5th gear. Configuring boost in lower gears will result in higher actual boost as load is significantly greater at higher gears. (You may notice that boost begins to fall as you raise the rpm beyond peak boost. This is normal) |
POWER |
MX7960 |
400〜420ps |
MX8270 |
400〜420ps |
For a stock engine, around 300〜330ps is the maximum it can withstand. Accordingly boost should be limited to around 1.1〜1.2k. |
PISTONS |
MX7960 |
FORGED TOMEI PISTONS |
MX8270 |
Stock SR20 pistons can withstand up to around 330ps. However, the 7960 / 8270 turbo @ 1.6kg/cm²(22.8psi) boost significantly increases combustion pressure which can cause the stock pistons to melt. Therefore, It is highly recommended that you upgrade to forged pistons for high boost setups. The head gasket should also be upgraded at the same time. (The life span of an SR20 engine running stock pistons @ 1.3kg/cm² (18.49psi) boost is said to be around 1 year.) |
HEAD GASKET |
MX7960 |
TOMEI METAL HEAD GASKET |
MX8270 |
Increasing boost will naturally increase combustion pressure. To maintain a secure seal at high boost is it strongly recommended that you upgrade to a high performance head gasket with superior sealing. Changing head gaskets will also allow you to adjust the compression ratio. |
INJECTOR CAPACITY |
MX7960 |
More than 680cc |
MX8270 |
Target horse power×5.9÷No. of cylinders = required injector capacity per cylinder. Injectors should be operating at around 80〜90% capacity to maintain good fuel atomization. |
FUEL PUMP CAPACITY |
MX7960 |
More than 178L/h |
MX8270 |
Injector capacity×No. of cylinders×0.06 = required fuel pump capacity Fuel pumps should be operating at around 80〜90% capacity to maintain good fuel flow. |
FUEL PRESSURE REGULATOR |
MX7960 |
Adjustable type: TOMEI TYPE-S or similar |
MX8270 |
Fuel pressure should be adjusted according to the fuel pump. Initial/atmospheric pressure should be set to 3kg/cm2. |
AIR CLEANER |
MX7960 |
High flow type |
MX8270 |
Bolt-on replacement upgrade recommended if retaining MAF sensor. |
MAF |
MX7960 |
Stock Z32 or without TOMEI MAF KIT or MAF delete intake kit |
MX8270 |
The stock Airflow diameter is too small and restrictive. A common upgrade is the Nissan Z32 Airflow meter. With the Z32 AFM it is possible to reach 450ps however a MAF delete setup is setup is recommended for higher power setups. |
SUCTION PIPE |
MX7960 |
High Flow Type |
MX8270 |
If you run high boost with the stock suction pipe, deformation of the pipe can occur and cause unwanted flow restrictions. Replacing this will improve air flow. |
INTERCOOLER |
MX7655 |
Large Capacity and High Flow Type |
MX8260 |
Compressed and pressurized air from the turbo is sent to the engine. As is, this air is warm/hot resulting in reduced air density and combustion efficiency which in turn leads to a decrease in performance. The intercooler sits between the turbo and the engine, dissipating the heat from the pressurized air. This cooler air is significantly denser, improving combustion efficiency and performance. |
BLOW-OFF VALVE |
MX7655 |
Non Vent to Atmosphere Type. S14/15 Recirculation Intake Relief recommended |
MX8260 |
When the Blow Off Valve relieves pressure by venting to the atmosphere, the turbo will work the same as the re-circulation method. But when the throttle is suddenly closed, air will still continue to flow through the AFM which will confuse the ECU to allow more fuel to be injected into the engine even when there is insufficient air flowing into the engine. This will cause the mixture to run rich and cause the engine to stall. This fouls the plugs and drops engine performance. So when using a blow off valve that re-circulates like standard, this eliminates the problem and allows the ECU to accurately control the correct air/fuel mixture at all times. ※ The S14/15 comes with the Re-circulation Valve for intake relief function. This is when the pressure is higher than the supercharger, and so it acts as a safety device to allow the excess pressure to vent back into the intake system. This usually happens when the excess pressure reaches 0.1〜 0.4kg/cm². |
EXHAUST MANIFOLD |
MX7655 |
TOMEI EXPREME or similar |
MX8260 |
By upgrading your camshafts, you can increase the exhaust pressure. To take advantage of this replacing the manifold is highly recommended. This will help spool the turbos more efficiently for a smoother and more responsive boost |
TURBO OUTLET |
MX7655 |
TOMEI EXPREME or similar |
MX8260 |
The stock outlet pipes have a restricted flow. In particular, at higher engine speeds (RPM), the narrower stock outlet pipes cause the exhaust gasses to build up within them, leading to unstable boost. With the larger outlet pipes, exhaust gasses can flow more efficiently, stabilizing boost and improving the overall response of the turbo. |
FRONT PIPE |
MX7655 |
TOMEI EXPREME or similar |
MX8260 |
As with the outlet, smooth air flow will improve the response pickup, leading to better performance overall |
CATALYTIC CONVERTER |
MX7655 |
Metal catalytic converter |
MX8260 |
This allow high exhaust flow efficiency whilst still being able to reduce emissions. |
EXHAUST |
MX7655 |
Φ80mm main pipe diameter |
MX8260 |
As with the outlet, smooth air flow will improve response pickup and performance gains. |
ECU |
MX7655 |
To suit the car's setup requirements. |
MX8260 |
The ECU will need to be remapped after installation to suit the vehicles specifications/intended use |
SPARK PLUG |
MX7655 |
No. 8 / 9 or similar |
MX8260 |
The increase in power also means an increase combustion temperature. This can cause the stock spark plugs to melt. Heat range 8 or 9 spark plugs are generally recommended, although you should conduct an individual inspection to determine the best type for your vehicle. |
|
|
|
|
|
CATEGORY |
RECOMMENDATION |
BOOST SETTING |
MX7960 |
1.6kg/cm²(22.8psi)with boost controller |
MX8270 |
The 7960 / 8270 turbo is capable of making over 400ps / 450ps respectively @ 1.6kg/cm²(22.8psi) boost. For a stock engine, it is recommended that you at least upgrade the head gasket to a metal type. With the stock setup the engine should be able to withstand up to around 330ps @ 1.0〜1.1kg/cm² (14.2〜15.6psi)boost. With the upgraded gasket, 1.3kg/cm²(18.49psi)boost is possible and with forged pistons, 1.5〜1.6kg/cm2 (21.3〜22.8psi)can be achieved. Note that boost settings should be made in 4th/5th gear. Configuring boost in lower gears will result in higher actual boost as load is significantly greater at higher gears. (You may notice that boost begins to fall as you raise the rpm beyond peak boost. This is normal) |
POWER |
MX7960 |
400〜420ps |
MX8270 |
400〜420ps |
For a stock engine, around 300〜330ps is the maximum it can withstand. Accordingly boost should be limited to around 1.1〜1.2k. |
PISTONS |
MX7960 |
FORGED TOMEI PISTONS |
MX8270 |
Stock SR20 pistons can withstand up to around 330ps. However, the 7960 / 8270 turbo @ 1.6kg/cm²(22.8psi) boost significantly increases combustion pressure which can cause the stock pistons to melt. Therefore, It is highly recommended that you upgrade to forged pistons for high boost setups. The head gasket should also be upgraded at the same time. (The life span of an SR20 engine running stock pistons @ 1.3kg/cm² (18.49psi) boost is said to be around 1 year.) |
HEAD GASKET |
MX7960 |
TOMEI METAL HEAD GASKET |
MX8270 |
Increasing boost will naturally increase combustion pressure. To maintain a secure seal at high boost is it strongly recommended that you upgrade to a high performance head gasket with superior sealing. Changing head gaskets will also allow you to adjust the compression ratio. |
INJECTOR CAPACITY |
MX7960 |
More than 680cc, TOMEI 740cc |
MX8270 |
Target horse power×5.9÷No. of cylinders = required injector capacity per cylinder. Injectors should be operating at around 80〜90% capacity to maintain good fuel atomization. |
FUEL PUMP CAPACITY |
MX7960 |
More than 178L/h |
MX8270 |
Injector capacity×No. of cylinders×0.06 = required fuel pump capacity Fuel pumps should be operating at around 80〜90% capacity to maintain good fuel flow. |
FUEL PRESSURE REGULATOR |
MX7960 |
Adjustable type: TOMEI TYPE-S or similar |
MX8270 |
Fuel pressure should be adjusted according to the fuel pump. Initial/atmospheric pressure should be set to 3kg/cm2. |
AIR CLEANER |
MX7960 |
High flow type |
MX8270 |
Bolt-on replacement upgrade recommended if retaining MAF sensor. |
MAF |
MX7960 |
Stock Z32 or without TOMEI MAF KIT or MAF delete intake kit |
MX8270 |
The stock Airflow diameter is too small and restrictive. A common upgrade is the Nissan Z32 Airflow meter. With the Z32 AFM it is possible to reach 450ps however a MAF delete setup is setup is recommended for higher power setups. |
SUCTION PIPE |
MX7960 |
High Flow Type |
MX8270 |
If you run high boost with the stock suction pipe, deformation of the pipe can occur and cause unwanted flow restrictions. Replacing this will improve air flow. |
INTERCOOLER |
MX7655 |
Large Capacity and High Flow Type |
MX8260 |
Compressed and pressurized air from the turbo is sent to the engine. As is, this air is warm/hot resulting in reduced air density and combustion efficiency which in turn leads to a decrease in performance. The intercooler sits between the turbo and the engine, dissipating the heat from the pressurized air. This cooler air is significantly denser, improving combustion efficiency and performance. |
BLOW-OFF VALVE |
MX7655 |
Non Vent to Atmosphere Type. S14/15 Recirculation Intake Relief recommended |
MX8260 |
When the Blow Off Valve relieves pressure by venting to the atmosphere, the turbo will work the same as the re-circulation method. But when the throttle is suddenly closed, air will still continue to flow through the AFM which will confuse the ECU to allow more fuel to be injected into the engine even when there is insufficient air flowing into the engine. This will cause the mixture to run rich and cause the engine to stall. This fouls the plugs and drops engine performance. So when using a blow off valve that re-circulates like standard, this eliminates the problem and allows the ECU to accurately control the correct air/fuel mixture at all times. ※ The S14/15 comes with the Re-circulation Valve for intake relief function. This is when the pressure is higher than the supercharger, and so it acts as a safety device to allow the excess pressure to vent back into the intake system. This usually happens when the excess pressure reaches 0.1〜 0.4kg/cm². |
EXHAUST MANIFOLD |
MX7655 |
TOMEI EXPREME or similar |
MX8260 |
By upgrading your camshafts, you can increase the exhaust pressure. To take advantage of this replacing the manifold is highly recommended. This will help spool the turbos more efficiently for a smoother and more responsive boost |
TURBO OUTLET |
MX7655 |
TOMEI EXPREME or similar |
MX8260 |
The stock outlet pipes have a restricted flow. In particular, at higher engine speeds (RPM), the narrower stock outlet pipes cause the exhaust gasses to build up within them, leading to unstable boost. With the larger outlet pipes, exhaust gasses can flow more efficiently, stabilizing boost and improving the overall response of the turbo. |
FRONT PIPE |
MX7655 |
TOMEI EXPREME or similar |
MX8260 |
As with the outlet, smooth air flow will improve the response pickup, leading to better performance overall |
CATALYTIC CONVERTER |
MX7655 |
Metal catalytic converter |
MX8260 |
This allow high exhaust flow efficiency whilst still being able to reduce emissions. |
EXHAUST |
MX7655 |
Φ80mm main pipe diameter |
MX8260 |
As with the outlet, smooth air flow will improve response pickup and performance gains. |
ECU |
MX7655 |
To suit the car's setup requirements. |
MX8260 |
The ECU will need to be remapped after installation to suit the vehicles specifications/intended use |
SPARK PLUG |
MX7655 |
No. 8 / 9 or similar |
MX8260 |
The increase in power also means an increase combustion temperature. This can cause the stock spark plugs to melt. Heat range 8 or 9 spark plugs are generally recommended, although you should conduct an individual inspection to determine the best type for your vehicle. |
|
|
|
|
|
CATEGORY |
RECOMMENDATION |
BOOST SETTING |
STD |
1.0〜1.2kg/cm²(14.2〜17.1psi)with boost controller |
TUNED |
1.6kg/cm²(22.8psi)with boost controller |
This turbocharger is capable of making over 450ps @ 1.6kg/cm²(22.8psi)boost. However, actual results will vary depending on the condition of the vehicle. Note that boost settings should be made in 4th/5th gear. Configuring boost in lower gears will result in higher actual boost as load is significantly greater at higher gears. (You may notice that boost begins to fall as you raise the rpm beyond peak boost. This is normal) |
POWER |
STD |
350ps |
TUNED |
450ps |
Camshafts, turbo suction pipe, exhaust manifold, turbo outlet, catalytic converters as well as exhaust systems can all impact performance. With stock camshafts, exhaust manifold and turbo outlet around 350ps is achievable @ 1.2kg/cm²(17.1psi) boost. Upgrading all the above should make around 450ps @ 1.6kg/cm²(22.8psi) boost. |
PISTONS |
STD |
Stock |
TUNED |
Stock 1JZ pistons can withstand up to around 600ps provided the engine is healthy. However, upgrading to forged pistons is highly recommended for engines with compression loss and/or other issues. |
CONNECTING RODS |
STD |
Stock |
TUNED |
TOMEI H-BEAM CONNECTING RODS |
Stock 1JZ connecting rods can withstand up to around 500ps. Beyond this, it is highly recommended that you upgrade the connecting rods. |
CAMSHAFTS |
STD |
Stock |
TUNED |
TOMEI PONCAM or similar |
Stock camshafts are incapable of generating the exhaust pressure needed to take advantage of the larger turbo. Upgrading the camshafts will allow you to maximize the potential of the turbo. |
HEAD GASKET |
STD |
Stock |
TUNED |
TOMEI METAL HEAD GASKET or similar |
Increasing the boost will also increase the combustion pressure. It's possible to increase the boost up to around 1.6kg/cm²(22.8psi)even with a stock head gasket. However, lowing the compression ratio will allow you to fine tune the engine. To maintain a secure seal at high boost is it strongly recommended that you upgrade to a high performance head gasket with superior sealing. Gasket thickness should be selected based on the desired compression ratio. For reference, TOMEI φ87.5-1.8o=8.8:1 CR, φ87.5-2.0o=8.:1 CR6 however actual figures will depend on the amount of resurfacing/head work that has been undertaken |
INJECTOR CAPACITY |
STD |
More than 550cc |
TUNED |
Target horse power×5.9÷No. of cylinders = required injector capacity per cylinder. Injectors should be operating at around 80〜90% capacity to maintain good fuel atomization. |
FUEL PUMP CAPACITY |
STD |
More than 240L/h(3kg/cm² fuel pressure) |
TUNED |
Injector capacity×No. of cylinders×0.06 = required fuel pump capacity Fuel pumps should be operating at around 80〜90% capacity to maintain good fuel flow |
FUEL PRESSURE REGULATOR |
STD |
Adjustable type: TOMEI TYPE-S or similar |
TUNED |
Fuel pressure should be adjusted according to the fuel pump. Initial/atmospheric pressure should be set to 3kg/cm2. |
AIR CLEANER |
STD |
High flow type |
TUNED |
The air cleaner/filter should be upgraded to suit the power output of the engine. |
MAF |
STD |
Either with or without stock MAF |
TUNED |
500ps is the maximum for a stock MAF. |
SUCTION PIPE |
MX7960 |
Stock or bolt-on upgrade |
MX8270 |
Straight type |
Upgrading the suction pipe significantly improves air flow efficiency compared to the stock suction pipe which can sometimes warp during high boost. However, using a straight type suction pipe while retaining the MAF sensor may cause rough idling and/or more frequent stalling. |
INTERCOOLER |
MX7655 |
Something better than bolt-on upgrade |
MX8260 |
High capacity, high efficiency type |
In general, pressurized air from the turbo is compressed and forced into the engine. However, the air from the has low oxygen content (low density) as the air is hot and expanded. This has an adverse effect on combustion efficiency and subsequently on performance. By installing an intercooler between the turbo and the engine, it allows the compressed air to be cooled before it enters the combustion chamber. This results in improved engine performance as the colder denser air improves combustion efficiency. |
BLOW-OFF VALVE |
MX7655 |
High performance type
(not vent to atmosphere) |
MX8260 |
When the throttle closes, the pressurized air from the turbo has no where to go and is forced back towards the turbo. This puts significant stress on the compressor wheel and in some instances can be enough to stall it all together. To prevent this, a blow-off valve is installed between the turbo and throttle to recirculate the air to between the MAF and turbo. However, using a stock blow off valve for high boost setups will cause it to relief the boost prematurely, resulting in reduced response and power. Therefore it is highly recommended that you upgrade the blow-off valve to a high performance unit. It should be noted that whilst both vent-to-atmosphere type and recirculation type blow-off valve setups serve the same function of relieving boost, the former will often cause the MAF to give false readings. For this reason it is recommended that you recirculate the excess boost. |
EXHAUST MANIFOLD |
MX7655 |
Stock |
MX8260 |
High flow, high efficiency type |
With the increased exhaust pressure from upgrading the camshafts, a high flow exhaust manifold is needed to efficiently route the exhaust gases to the turbine wheel. This helps improve turbo spool and performance. |
TURBO OUTLET |
MX7655 |
Stock |
MX8260 |
High flow, high efficiency type around 76.3mm I.D |
The stock turbo outlet isn't capable of expunging the exhaust gasses efficiently. Especially at high rpms with higher boost, the confined exhaust gasses are unable to flow efficiently through the turbo, causing unstable boost. Upgrading the turbo outlet to one with a larger opening helps solve this issue, providing improved turbo spool and stable boost. |
FRONT PIPE |
MX7655 |
Around φ76.3 |
MX8260 |
Similar to the turbo outlet, upgrading the front pipe improves performance in both the mid range and top end. |
CATALYTIC CONVERTER |
MX7655 |
Metal type |
MX8260 |
Upgrading to a metal catalytic converter greatly reduces exhaust flow resistance whist maintaining it's core function of reducing toxic gasses. |
EXHAUST |
MX7655 |
Around φ80〜90 |
MX8260 |
Similar to the turbo outlet, upgrading the exhaust improves performance in both the mid range and top end |
ECU |
MX7655 |
Vehicle/setup specific |
MX8260 |
The ECU should be adjusted to suit the vehicle/setup. |
SPARK PLUG |
MX7655 |
No. 8 / 9 or similar |
MX8260 |
As the power increases, so does the combustion temperature. Using spark plugs of the same heat rating as stock may cause them to melt. To avoid this, it is recommended that you use No. 8 / 9 spark plus. However, ensure you check the spark plug tips to determine the best solution. spark plugs to melt. Heat range 8 or 9 spark plugs are generally recommended, although you should conduct an individual inspection to determine the best type for your vehicle. |
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CATEGORY |
RECOMMENDATION |
BOOST SETTING |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
1.4~1.5kg/cm2 (19.9~21.3psi) |
1.6kg/cm2 (22.8psi) |
MX7960(F) |
with boost controller |
MX8265 |
- |
- |
Rated power at 1.6kg/cm2 (22.8psi) boost; MX7760:380ps, MX7960(F):400ps, MX8265:450ps For a stock engine, it is recommended that you at least upgrade the head gasket to a metal type. With this setup the engine should be able to withstand up to around 350ps with the MX7760/MX7960(F). Accordingly, the boost should be limited to around1.4~1.5kg/cm2 (19.9~21.3psi). Upgrading to forged pistons and H-Beam connecting rods should allow you to safely raise the boost to 1.6kg/cm2 (22.8psi). However, this will depend on the specifications/condition of the vehicle. Note that boost settings should be made in 4th/5th gear. Configuring boost in lower gears will result in higher actual boost as load is significantly greater at higher gears. (You may notice that boost begins to fall as you raise the rpm beyond peak boost. This is normal) |
POWER |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
350PS |
380PS |
MX7960(F) |
350PS |
400PS |
MX8265 |
- |
450PS |
MX7760
MX7960(F)
|
For a stock engine, it is recommended that you at least upgrade the head gasket to a metal type. With this setup the engine should be able to withstand up to around 350ps with the boost limited to around1.4~1.5kg/cm2 (19.9~21.3psi). For 1.6kg/cm2 boost, upgrading to forged pistons is highly recommended. |
|
MX8265 |
This turbo is fundamentally designed for use with tuned/stroked engines with a displacement larger than 2.2l. On a stock engine, not only is it difficult to extract the full potential of this turbo, it may even damage the engine itself. |
|
PISTONS |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
FORGED PISTONS |
FORGED TOMEI PISTONS |
MX7960(F) |
MX8265 |
Stock pistons can withstand up to around 350ps. However, the M7960 turbo @ 1.6kg/cm²(22.8psi) boost significantly increases combustion pressure which can cause the stock pistons to melt. Therefore, It is highly recommended that you upgrade to forged pistons for high boost setups. The head gasket should also be upgraded at the same time. |
CONNECTING RODS |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
FORGED TOMEI H-BEAM CONRODS |
MX7960(F) |
MX8265 |
- |
FORGED TOMEI H-BEAM CONRODS |
Stock camshafts are incapable of generating the exhaust pressure needed to take advantage of the larger turbo. Upgrading the camshafts will allow you to maximize the potential of the turbo. Camshafts should also be chosen based on your vehicle's setup. |
CAMSHAFTS |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
TOMEI PONCAM or similar |
MX7960(F) |
MX8265 |
- |
TOMEI PONCAM or similar |
Stock camshafts are incapable of generating the exhaust pressure needed to take advantage of the larger turbo. Upgrading the camshafts will allow you to maximize the potential of the turbo. Camshafts should also be chosen based on your vehicle's setup. |
HEAD GASKET |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
STOCK |
TOMEI METAL HEAD GASKET |
MX7960(F) |
MX8265 |
- |
Increasing boost will naturally increase combustion pressure. To maintain a secure seal at high boost is it strongly recommended that you upgrade to a high performance head gasket with superior sealing |
INJECTOR CAPACITY |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
More than 650cc |
MX7960(F) |
MX8265 |
- |
More than 830cc |
Target horse power×5.9÷No. of cylinders = required injector capacity per cylinder. Injectors should be operating at around 80~90% capacity to maintain good fuel atomization. |
FUEL PUMP CAPACITY |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
More than 185L/h(3kg/cm² fuel pressure) |
MX7960(F) |
MX8265 |
- |
Over 185L/h(3kg/cm² fuel pressure) |
Injector capacity × No. of cylinders×0.06 = required fuel pump capacity Fuel pumps should be operating at around 80~90% capacity to maintain good fuel flow. |
FUEL PRESSURE REGULATOR |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
Adjustable type: TOMEI TYPE-S or similar |
MX7960(F) |
MX8265 |
- |
Adjustable type: TOMEI TYPE-S or similar |
Fuel pressure should be adjusted according to the fuel pump. Initial/atmospheric pressure should be set to 3kg/cm2. |
AIR CLEANER |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
High flow type |
MX7960(F) |
MX8265 |
- |
High flow type |
Bolt-on replacement upgrade recommended if retaining MAF sensor. |
MAF |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
Stock MAF or without MAF |
MX7960(F) |
MX8265 |
- |
Without MAF |
400ps is the maximum for a stock MAF. |
SUCTION PIPE |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
Upgrade as necessary |
MX7960(F) |
MX8265 |
- |
TOMEI SUCTION HOSE required. |
Upgrading the suction pipe significantly improves air flow efficiency compared to the stock suction pipe which can sometimes warp during high boost. However, this may alter the MAF readings. Please ensure you make the necessary adjustments. |
INTERCOOLER |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
Upgrade recommended |
MX7960(F) |
MX8265 |
- |
Upgrade required |
In general, pressurized air from the turbo is compressed and forced into the engine. However, the air from the has low oxygen content (low density) as the air is hot and expanded. This has an adverse effect on combustion efficiency and subsequently on performance. By installing an intercooler between the turbo and the engine, it allows the compressed air to be cooled before it enters the combustion chamber. This results in improved engine performance as the colder denser air improves combustion efficiency. |
BLOW-OFF VALVE
(Re-circulation type) |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
High performance type (not vent to atmosphere) |
MX7960(F) |
MX8265 |
- |
High performance type (not vent to atmosphere |
When the throttle closes, the pressurized air from the turbo has no where to go and is forced back towards the turbo. This puts significant stress on the compressor wheel and in some instances can be enough to stall it all together. To prevent this, a blow-off valve is installed between the turbo and throttle to recirculate the air to between the MAF and turbo. However, using a stock blow off valve for high boost setups will cause it to relief the boost prematurely, resulting in reduced response and power. Therefore it is highly recommended that you upgrade the blow-off valve to a high performance unit. It should be noted that whilst both vent-to-atmosphere type and recirculation type blow-off valve setups serve the same function of relieving boost, the former will often cause the MAF to give false readings. For this reason it is recommended that you recirculate the excess boost. |
EXHAUST MANIFOLD |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
Upgrade recommended |
MX7960(F) |
MX8265 |
- |
Upgrade required |
With the increased exhaust pressure from upgrading the camshafts, a high flow exhaust manifold is needed to efficiently route the exhaust gases to the turbine wheel. This helps improve turbo spool and performance. However, on an EJ engine, the exhaust ports on the cylinder head and the turbo are far apart. This means that an exhaust manifold with pipes too wide will have an adverse effect on performance. When changing from an unequal to equal length exhaust manifold, changing to the respective type oil pan is also recommended. Failing to do so may result in reduced performance as the equal length pipes are longer and have more bends. |
TURBO OUTLET
CATALYTIC CONVERTER
FRONT PIPE |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
Metal type, around φ70~φ75 |
MX7960(F) |
MX8265 |
- |
Metal type, Metal type, around φ70~φ75 |
The stock turbo outlet/front pipe isn't capable of expunging the exhaust gasses efficiently. Especially at high rpms with higher boost, the confined exhaust gasses are unable to flow efficiently through the turbo, causing unstable boost. Upgrading the turbo outlet/front pipe to one with a larger opening helps solve this issue, providing improved turbo spool and stable boost. Upgrading to a metal catalytic converter greatly reduces exhaust flow resistance whist maintaining it's core function of reducing toxic gasses. |
EXHAUST |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
Around φ80 |
MX7960(F) |
MX8265 |
- |
Around φ80 |
Similar to the turbo outlet, upgrading the exhaust improves performance in both the mid range and top end. |
ECU |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
Vehicle/setup specific |
MX7960(F) |
MX8265 |
- |
Vehicle/setup specific |
The ECU should be adjusted to suit the vehicle/setup. |
SPARK PLUG |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.2/2.5l stroker) |
MX7760 |
No. 8 / 9 or similar |
MX7960(F) |
MX8265 |
- |
No. 8 / 9 or similar |
As the power increases, so does the combustion temperature. Using spark plugs of the same heat rating as stock may cause them to melt. To avoid this, it is recommended that you use No. 8 / 9 spark plus. However, ensure you check the spark plug tips to determine the best solution. |
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CATEGORY |
RECOMMENDATION |
BOOST SETTING |
STOCK ENGINE |
1.0~1.2kgf/cm2(14.2~17.1psi)
with boost controller |
TUNED ENGINE
(e.g. 2.3l stroker) |
1.6kgf/cm2(22.8psi)
with boost controller |
|
POWER |
STOCK ENGINE |
350~370ps |
TUNED ENGINE
(e.g. 2.3l stroker) |
Around 450ps |
|
CAMSHAFTS |
STOCK ENGINE |
Stock / longer duration
Recommended: TOMEI PONCAM |
TUNED ENGINE
(e.g. 2.3l stroker) |
Longer duration cams Recommended: TOMEI PONCAM |
|
HEAD GASKET |
STOCK ENGINE |
High performance, metal type Recommended: TOMEI METAL HEAD GASKET |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
INJECTOR CAPACITY |
STOCK ENGINE |
550cc or larger
Target horse power×5.9÷No. of cylinders=required injector capacity |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
FUEL PUMP |
STOCK ENGINE |
240L/h or larger Injector capacity×No. of cylinders×0.06=required fuel pump capacity |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
FUEL PRESSURE REGULATOR |
STOCK ENGINE |
Adjustable type Recommended: TOMEI TYPE-S |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
AIR CLEANER |
STOCK ENGINE |
Recommended: Bolt-on, high flow type |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
SUCTION PIPE |
STOCK ENGINE |
Recommended: TOMEI TURBO SUCTION HOSE |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
INTERCOOLER |
STOCK ENGINE |
Standard or large capacity type |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
EXHAUST MANIFOLD |
STOCK ENGINE |
Standard or high flow type |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
OUTLET/FRONT PIPE |
STOCK ENGINE |
High flow type Recommended: TOMEI EXPREME |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
CATALYTIC CONVERTER |
STOCK ENGINE |
High flow type |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
EXHAUST |
STOCK ENGINE |
Around Φ80 main section |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
ECU |
STOCK ENGINE |
Vehicle/setup specific |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
BLOW-OFF VALVE |
STOCK ENGINE |
High performance type |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
SPARK PLUG |
STOCK ENGINE |
No. 8 / 9 or similar |
TUNED ENGINE
(e.g. 2.3l stroker) |
|
|
|
|
|
CATEGORY |
RECOMMENDATION |
BOOST SETTING |
|
STOCK ENGINE |
TUNED ENGINE
(e.g. 2.3l stroker) |
MX7960 |
1.4~1.5kgf/cm2 (19.9~21.3psi) with boost controller |
1.6kgf/cm2 (22.8psi) with boost controller1.6kgf/cm2(22.8psi)
with boost controller |
MX7967 |
|
POWER |
MX7960 |
360~370ps |
400~420ps |
MX7967 |
420~430ps |
|
CAMSHAFTS |
MX7960 |
Longer duration cams required
Recommended: TOMEI PONCAM |
MX7967 |
|
HEAD GASKET |
MX7960 |
High performance type recommended TOMEI METAL HEAD GASKET |
High performance type requiredHigh performance type required |
MX7967 |
|
INJECTOR CAPACITY |
MX7960 |
620cc or larger |
680cc or larger |
MX7967 |
760cc or larger |
|
FUEL PUMP |
MX7960 |
165L/h or larger(3kg/cm² pressure)v |
182L/h or larger (3kg/cm² fuel pressure) |
MX7967 |
220L/h or larger (3kg/cm² fuel pressure |
|
FUEL PRESSURE REGULATOR |
MX7960 |
Adjustable type required
Recommended: TOMEI TYPE-S |
MX7967 |
|
AIR CLEANER |
MX7960 |
Bolt-on, high flow type recommended |
MX7967 |
|
SUCTION PIPE |
MX7960 |
High efficiency type recommended |
High efficiency type required |
MX7967 |
|
TOMEI turbo suction hose recommended |
|
INTERCOOLER |
MX7960 |
Standard or large capacity type |
MX7967 |
|
EXHAUST MANIFOLD |
MX7960 |
High efficiency type required TOME EXPREME recommended |
MX7967 |
|
OUTLET/FRONT PIPE |
MX7960 |
High efficiency type required TOME EXPREME recommended |
MX7967 |
|
CATALYTIC CONVERTER |
MX7960 |
High efficiency type required Sports/metal type catalytic converter |
MX7967 |
|
EXHAUST |
MX7960 |
High efficiency type required Around Φ80 main section |
MX7967 |
|
ECU |
MX7960 |
Vehicle/setup specific |
MX7967 |
|
BLOW-OFF VALVE |
MX7960 |
High performance type required |
MX7967 |
|
SPARK PLUG |
MX7960 |
Higher rating required valve recommended No. 8 / 9 or similar |
MX7967 |
|
|
|
|
|
CATEGORY |
RECOMMENDATION |
BOOST SETTING |
STD |
1.0~1.1kg/cm²(14.2~15.6psi)with boost controller |
TUNED |
1.6kg/cm²(22.8psi)with boost controller |
The MX7960 turbo is capable of making over 400ps @ 1.6kg/cm²(22.8psi) boost. However, around 330ps is the maximum stock engine internals are able to to withstand before parts such as connecting rods begin to fail. Accordingly, boost should be limited to around 1.0~1.1kg/cm²(14.2~15.6psi). Note that boost settings should be made in 4th/5th gear. Configuring boost in lower gears will result in higher actual boost as load is significantly greater at higher gears. (You may notice that boost begins to fall as you raise the rpm beyond peak boost. This is normal) |
POWER |
STD |
330ps |
TUNED |
400ps |
Camshafts, turbo suction pipe, exhaust manifold, turbo outlet, catalytic converters as well as exhaust systems can all impact performance. With stock camshafts, exhaust manifold and turbo outlet around 350ps is achievable @ 1.0~1.1kg/cm²(14.2~15.6psi) boost. Upgrading all the above should make around 400ps @ 1.6kg/cm²(22.8psi) boost. |
PISTONS |
STD |
Stock |
TUNED |
FORGED PISTONS |
Stock pistons can withstand up to around 330ps. However, the MX7960 turbo @ 1.6kg/cm²(22.8psi) boost significantly increases combustion pressure which can cause the stock pistons to melt. Therefore, It is highly recommended that you upgrade to forged pistons for high boost setups. The head gasket should also be upgraded at the same time. |
CONNECTING RODS |
STD |
Stock |
TUNED |
H-BEAM CONNECTING RODS |
Stock connecting rods can withstand up to around 330ps. .Beyond this, it is highly recommended that you upgrade the connecting rods |
CAMSHAFTS |
STD |
TOMEI PONCAM or similar |
TUNED |
Stock camshafts are incapable of generating the exhaust pressure needed to take advantage of the larger turbo. Upgrading the camshafts will allow you to maximize the potential of the turbo. |
HEAD GASKET |
STD |
Stock |
TUNED |
High Performance Type |
Increasing boost will naturally increase combustion pressure. To maintain a secure seal at high boost is it strongly recommended that you upgrade to a high performance head gasket with superior sealing. |
INJECTOR CAPACITY |
STD |
550cc |
TUNED |
More than 650cc |
Target horse power×5.9÷No. of cylinders = required injector capacity per cylinder. Injectors should be operating at around 80~90% capacity to maintain good fuel atomization |
FUEL PUMP CAPACITY |
STD |
More than 240L/h(3kg/cm² fuel pressure) |
TUNED |
Injector capacity×No. of cylinders×0.06 = required fuel pump capacity Fuel pumps should be operating at around 80~90% capacity to maintain good fuel flow. |
AIR CLEANER |
STD |
High flow type |
TUNED |
The air cleaner/filter should be upgraded to suit the power output of the engine. |
MAF |
STD |
Either with or without stock MAF |
TUNED |
|
SUCTION PIPE |
STD |
Stock or bolt-on upgrade |
TUNED |
Straight type |
Upgrading the suction pipe significantly improves air flow efficiency compared to the stock suction pipe which can sometimes warp during high boost. However, using a straight type suction pipe while retaining the MAF sensor may cause rough idling and/or more frequent stalling. |
INTERCOOLER |
STD |
Something better than bolt-on upgrade |
TUNED |
High capacity, high efficiency type |
In general, pressurized air from the turbo is compressed and forced into the engine. However, the air from the has low oxygen content (low density) as the air is hot and expanded. This has an adverse effect on combustion efficiency and subsequently on performance. By installing an intercooler between the turbo and the engine, it allows the compressed air to be cooled before it enters the combustion chamber. This results in improved engine performance as the colder denser air improves combustion efficiency. The Hyundai GENESIS has a notoriously small intercooler and is particularly susceptible to high intake temperatures. |
BLOW-OFF VALVE
(RECIRCULATION VALVE) |
STD |
High performance type (vent to atmosphere |
TUNED |
When the throttle closes, the pressurized air from the turbo has no where to go and is forced back towards the turbo. This puts significant stress on the compressor wheel and in some instances can be enough to stall it all together. To prevent this, a blow-off valve is installed between the turbo and throttle to recirculate the air to between the MAF and turbo. However, using a stock blow off valve for high boost setups will cause it to relief the boost prematurely, resulting in reduced response and power. Therefore it is highly recommended that you upgrade the blow-off valve to a high performance unit. It should be noted that whilst both vent-to-atmosphere type and recirculation type blow-off valve setups serve the same function of relieving boost, the former will often cause the MAF to give false readings. For this reason it is recommended that you recirculate the excess boost. |
EXHAUST MANIFOLD |
STD |
Stock |
TUNED |
High flow, high efficiency type |
With the increased exhaust pressure from upgrading the camshafts, a high flow exhaust manifold is needed to efficiently route the exhaust gases to the turbine wheel. This helps improve turbo spool and performance. |
TURBO OUTLET |
STD |
Stock |
TUNED |
High flow, high efficiency type |
The stock turbo outlet isn't capable of expunging the exhaust gasses efficiently. Especially at high rpms with higher boost, the confined exhaust gasses are unable to flow efficiently through the turbo, causing unstable boost. Upgrading the turbo outlet to one with a larger opening helps solve this issue, providing improved turbo spool and stable boost. |
FRONT PIPE |
STD |
Around φ76.3 |
TUNED |
Similar to the turbo outlet, upgrading the front pipe improves performance in both the mid range and top end. |
CATALYTIC CONVERTER |
STD |
Metal type |
TUNED |
Upgrading to a metal catalytic converter greatly reduces exhaust flow resistance whist maintaining it's core function of reducing toxic gasses |
EXHAUST |
STD |
Around φ80~90 |
TUNED |
Similar to the turbo outlet, upgrading the exhaust improves performance in both the mid range and top end. |
ECU |
STD |
Vehicle/setup specific |
TUNED |
The ECU should be adjusted to suit the vehicle/setup. |
SPARK PLUG |
STD |
No. 8 / 9 or similar |
TUNED |
As the power increases, so does the combustion temperature. Using spark plugs of the same heat rating as stock may cause them to melt. To avoid this, it is recommended that you use No. 8 / 9 spark plus. However, ensure you check the spark plug tips to determine the best solution. |
|
|
|