03Jul2024-07-03

HIGH PERFORMANCE TIMING BELTS – VG30, 4G63, and B6/BP Now Available

HIGH PERFORMANCE TIMING BELT
VG30, 4G63, B6/BP
Now Available!

LINEUPS

MAKE/ENGINE	NOTE	DESCRIPTION	PART NO.
NISSAN
RB26DETT RB25DE(T) RB20DE(T)		TIMING BELT	TB101A-NS05A
VG30DE(TT) VG30DET VG20DET	NEW		TB101A-NS10A
CA18DE(T)			TB101A-NS11A
TOYOTA
4A-G(Z)E 16V		TIMING BELT	TB101A-TY01A
4A-G 20V	AE111 ONLY		TB101A-TY02A
2JZ-G(T)E			TB101A-TY03A
1JZ-G(T)E			TB101A-TY04A
MITSUBISHI
4G63	NEW	TIMING BELT	TB101A-MT01A
4G63		BALANCER BELT	TB102A-MT01A
SUBARU
EJ20/EJ25	DOHC	TIMING BELT	TB101A-SB01A
EJ20/EJ25		TIMING BELT GUIDE	TB103A-SB01A
MAZDA
B6-ZE BP-ZE BP-VE	NEW	TIMING BELT	TB101A-MZ01A
HONDA
B16A		TIMING BELT	TB101A-HN02A
B16B/B18C		TIMING BELT	TB101A-HN03A

HOW IS YOUR TIMING BELT?

OEM timing belts were never intended for use with tuned engines!

Replacing worn or stretched timing belt might just save your engine!

COMPARISON : TOMEI vs OEM

TOMEI TIMING BELT FEATURES

The Nissan and Subaru belts have matching marks similar to those on the OEM belts, allowing the user to check the position of the belt in relation to the cam pulley and crank pulley correctly when installing the belt.

IMAGE GALLERY

VG30

4G63

B6/BP

RB26/RB25/RB20

4AG

EJ20/EJ25

VG30DE[TT]/VG30DET/VG20DET

B6-ZE/BP-ZE/BP-VE

4G63

4G63 BALANCER BELT

RB26DETT/RB25DE[T]/RB20DE[T]

CA18DE[T]

4A-G[Z]E 16V

4A-G 20V AE111

2JZ-G[T]E

1JZ-G[T]E

EJ20/EJ25 DOHC

B16A

B16B/B18C

23May2024-05-25

By TOMEI USA

ALL NEW 0.5mm OVERSIZED FORGED PISTONS

All New
0.5mm OVERSIZED PISTONS!

Wide variety of applications
from overhaul to increasing displacement

We have recently added a new bore size to Tomei’s forged piston series, which has received very high praise from engine builders and engineers at tuning shops in Japan by RSE and around the world. The new bore size is oversized by 0.5mm. This is a smaller size compared to our current 1.0mm oversized lineup. For example, RB26’s standard bore size is 86.0mm, and Tomei’s current piston bore is 87.0mm. This time, we have added 86.5mm pistons, which are oversized by 0.5mm from stock. Due to the smaller bore, the displacement is slightly smaller at 2598.6cc for the 86.5mm model than the 87.0mm model’s 2628.7cc. Still, it is very difficult to obtain new cylinder blocks these days, so we have added 0.5mm oversized pistons for those who want to use the precious cylinder block with care and who wish to maintain block strength. Of course, those aiming for the ultimate power can still choose the larger bore of 87.0mmpistons. This time, Tomei would like to increase bore options and help engine builders realize the ultimate engine they are aiming for. At the same time as the piston kit, a new bore size has also been added to Tomei’s stroker kit. We hope that you will complete the ideal engine that suits your purpose and enjoy your car life further. 1

New Lineup

ENGINE	BORE(mm) [OEM]	COMPATIBLE STROKE	PART NO.	AVAILABLE
NISSAN
RB26DETT	86.50 [+0.50]	STD/2.8L	TA202A-NS05B More details	End of June
SR20DET	86.50 [+0.50]	2.2L	TA202A-NS08C More details	End of June
SR20DET	86.50 [+0.50]	STD	TA202A-NS08D More details	End of July
TOYOTA
4A-G 16VALVE	81.50 [+0.50]	1.8L		To Be Announced
4A-G 20VALVE	81.50 [+0.50]	1.8L		To Be Announced
2JZ-GTE	86.50 [+0.50]	3.4L	TA202A-TY03D More details	End of July
		3.6L	TA202A-TY03E More details
		STD	TA202A-TY03F More details
MITSUBISHI
4G63 EVO1-9	85.50 [+0.50]	2.2/2.3L	TA202A-MT01B More details	Mid June
4B11 EVO10	86.50 [+0.50]	2.3L	TA202A-MT02B More details	Mid June

Current Lineup

ENGINE	BORE(mm) [OEM]	COMPATIBLE STROKE	PART NO.
NISSAN
VR38DETT	95.50 [±0.0]	4.1L	TA202A-NS01A More details
RB26DETT RB25DET	87.00 [+1.00]	2.6L/2.8L	TA202A-NS05A More details
SR20DET	87.00 [+1.00]	2.2L	TA202A-NS08A More details
SR20DET	87.00 [+1.00]	2.0L	TA202A-NS08B More details
TOYOTA
4A-G 16VALVE	82.00 [+1.00]	1.8L	TA202A-TY01AP More details
4A-G 20VALVE	82.00 [+1.00]	1.8L	TA202A-TY02AP More details
2JZ-GTE	87.00 [+1.00]	3.4L	TA202A-TY03A More details
		3.6L	TA202A-TY03B More details
		3.0L	TA202A-TY03C More details
SUBARU
EJ25	99.75 [+0.25]	2.5L/2.6L	TA202A-SB02A More details
MITSUBISHI
4G63 EVO1-9	86.00 [+1.00]	2.2L/2.3L	TA202A-MT01A More details
4B11 EVO10	87.00 [+1.00]	2.3L	TA202A-MT02A More details

VR38DETT (4.1)

RB26DETT (2.6/2.8)

SR20DET (2.2)

SR20DET (2.0)

4A-G 16VALVE (1.8)

4A-G 20VALVE (1.8)

2JZ-GTE (3.4)

2JZ-GTE (3.6)

2JZ-GTE (3.0)

EJ25 (2.5/2.6)

4G63 (2.2/2.3)

4B11 (2.3)

TOMEI FORGED PISTON FEATURES

Forging Material Exclusive For Each Model

3D Profile

Compatible With 1mm Oversized Valves

Designed For Thin Piston Rings

New stroker kits with 0.5mm oversized piston are now available

ENGINE	TYPE	BORE(mm) [OEM]	CRANKSHAFT	PART NO.
NISSAN
RB26DETT RB25DET	2.8	86.50 [+0.50]	8 COUNTER	TA201A-NS05D More details
	2.8		FULL COUNTER	TA201A-NS05E More details
	2.6		FULL COUNTER	TA201A-NS05F More details
SR20DET	2.2	86.50 [+0.50]	FULL COUNTER	TA201A-NS08B More details
TOYOTA
2JZ-GTE	3.4	86.50 [+0.50]	FULL COUNTER	TA201A-TY03C More details
2JZ-GTE	3.6	86.50 [+0.50]	FULL COUNTER	TA201A-TY03D More details
MITSUBISHI
4G63 EVO1-9	2.2	85.50 [+0.50]	FULL COUNTER	TA201A-MT01C More details
4G63 EVO1-9	2.3	85.50 [+0.50]	FULL COUNTER	TA201A-MT01D More details
4B11 EVO10	2.3	86.50 [+0.50]	FULL COUNTER	TA201A-MT02B More details

RB26DETT/RB25DET 2.8 8 COUNTER

RB26DETT/RB25DET 2.8 FULL COUNTER

RB26DETT/RB25DET 2.6 FULL COUNTER

SR20DET 2.2

2JZ-GTE 3.4

2JZ-GTE 3.6

4G63 EVO1-9 2.2

4G63 EVO1-9 2.3

4B11 EVO10 2.3

CYLINDER BLOCK RELATED PRODUCTS

ENGINE	CATEGORY	SPEC [OEM]		PART NO.
NISSAN
VR38DETT	STROKER KIT	4.1L	TOMEI BORE: 95.50mm [+-0.00]	TA201A-NS01A
	PISTON	for 4.1L	TOMEI BORE: 95.50mm [+-0.00] CH 31.20mm [+-0.00]	TA202A-NS01A
	CON-ROD	for 4.1L	165.10mm [+-0.00]	TA203A-NS01A
	CRANKSHAFT	for 4.1L	94.40mm [+6.00]	TA204D-NS01A
VQ35HR	CON-ROD	for 3.5L(STD)	151.80mm [+-0.00]	TA203A-NS03A
VQ35DE	CON-ROD	for 3.5L(STD)	144.20mm [+-0.00]	TA203A-NS04A
RB26DETT	STROKER KIT	2.8L 8-C.W.	TOMEI BORE: 87.00mm [+1.00]	TA201A-NS05A
			CP BORE 87.00mm [+1.00]	TA201A-NS05AP
			TOMEI BORE: 86.50mm [+0.50]	TA201A-NS05D
		2.8L Full-C.W.	TOMEI BORE: 87.00mm [+1.00]	TA201A-NS05B
			CP BORE 87.00mm [+1.00]	TA201A-NS05BP
			TOMEI BORE: 86.50mm [+0.50]	TA201A-NS05E
		2.6L(STD) Full-C.W.	TOMEI BORE: 87.00mm [+1.00]	TA201A-NS05C
			CP BORE 87.00mm [+1.00]	TA201A-NS05CP
			TOMEI BORE: 86.50mm [+0.50]	TA201A-NS05F
	PISTON	for 2.6L(STD)/2.8L	TOMEI BORE: 87.00mm [+1.00] CH 30.00mm [+-0.00]	TA202A-NS05A
			CP BORE 87.00mm [+1.00] CH 30.00mm [+-0.00]	TA202A-NS05AP
			TOMEI BORE: 86.50mm [+0.50] CH 30.00mm [+-0.00]	TA202A-NS05B
	CON-ROD	for 2.6L(STD)	121.50mm [+-0.00]	TA203A-NS05A
	CON-ROD	for 2.8L	119.50mm [-2.00]	TA203A-NS05B
	CRANKSHAFT	for 2.6L(STD)	Full-C.W. 73.70mm [+-0.00]	TA204B-NS05A
		for 2.8L	Full-C.W. 77.70mm [+4.00]	TA204B-NS05B
		for 2.8L	8-C.W. 77.70mm [+4.00]	TA204C-NS05A
RB25DET	STROKER KIT	2.8L 8-C.W.	TOMEI BORE: 87.00mm [+1.00]	TA201A-NS05A
			CP BORE 87.00mm [+1.00]	TA201A-NS05AP
			TOMEI BORE: 86.50mm [+0.50]	TA201A-NS05D
		2.8L Full-C.W.	TOMEI BORE: 87.00mm [+1.00]	TA201A-NS05B
			CP BORE 87.00mm [+1.00]	TA201A-NS05BP
			TOMEI BORE: 86.50mm [+0.50]	TA201A-NS05E
		2.6L(STD) Full-C.W.	TOMEI BORE: 87.00mm [+1.00]	TA201A-NS05C
			CP BORE 87.00mm [+1.00]	TA201A-NS05CP
			TOMEI BORE: 86.50mm [+0.50]	TA201A-NS05F
	PISTON	for 2.6L(STD)/2.8L	TOMEI BORE: 87.00mm [+1.00] CH 30.00mm [+-0.00]	TA202A-NS05A
			CP BORE 87.00mm [+1.00] CH 30.00mm [+-0.00]	TA202A-NS05AP
			TOMEI BORE: 86.50mm [+0.50] CH 30.00mm [+-0.00]	TA202A-NS05B
	CON-ROD	for 2.5L(STD)/2.6L	121.50mm [+-0.00]	TA203A-NS05A
	CON-ROD	for 2.8L	119.50mm [-2.00]	TA203A-NS05B
	CRANKSHAFT	for 2.6L	Full-C.W. 73.70mm [+-0.00]	TA204B-NS05A
		for 2.8L	Full-C.W. 77.70mm [+4.00]	TA204B-NS05B
		for 2.8L	8-C.W. 77.70mm [+4.00]	TA204C-NS05A
RB25DE(T) NEO6	CON-ROD	for 2.5L(STD)	121.50mm [+-0.00]	TA203A-NS05A
RB25DE	CON-ROD	for 2.5L(STD)	121.50mm [+-0.00]	TA203A-NS05A
SR20DET	STROKER KIT	2.2L	TOMEI BORE: 87.00mm [+1.00]	TA201A-NS08A
	STROKER KIT	2.2L	TOMEI BORE: 86.50mm [+0.50]	TA201A-NS08B
	PISTON	for 2.2L	TOMEI BORE: 87.00mm [+1.00] CH 29.50mm [-2.50]	TA202A-NS08A
		for 2.2L	TOMEI BORE: 86.50mm [+0.50] CH 29.50mm [-2.50]	TA202A-NS08C
		for 2.0L(STD)	TOMEI BORE: 87.00mm [+1.00] CH 32.00mm [+-0.00]	TA202A-NS08B
		for 2.0L(STD)	TOMEI BORE: 86.50mm [+0.50] CH 32.00mm [+-0.00]	TA202A-NS08D
	CON-ROD	for 2.0L(STD)/2.2L	136.30mm [+-0.00]	TA203A-NS08A
	CRANKSHAFT	for 2.2L	Full-C.W. 91.00mm [+5.00]	TA204B-NS08A
SR20DE SR18DE	CON-ROD	for 2.0L(STD)/1.8L(STD)	136.30mm [+-0.00]	TA203A-NS08A
KA24DE	CON-ROD	for 2.4L(STD)	165.00mm [+-0.00]	TA203A-NS16A
TOYOTA
4A-G 16VALVE	STROKER KIT	1.8L	CP BORE: 82.00mm [+1.00]	TA201A-TY01AP
4A-G 16VALVE	PISTON	for 1.8L	CP BORE: 82.00mm [+1.00] CH 27.70mm [-3.00]	TA202A-TY01AP
4A-G(Z) 16VALVE	CON-ROD	for 1.6L(STD)/1.8L	122.00mm [+-0.00]	TA203A-TY01A
4A-G(Z) 16VALVE	CRANKSHAFT	for 1.8L	Full-C.W. 83.00mm [+6.00]	TA204B-TY01A
4A-G 20VALVE	STROKER KIT	1.8L	BORE: 82.00mm [+1.00]	TA201A-TY02AP
	PISTON	for 1.8L	CP BORE: 82.00mm [+1.00] CH 27.70mm [-3.00]	TA202A-TY02AP
	CON-ROD	for 1.6L(STD)/1.8L	122.00mm [+-0.00]	TA203A-TY01A
	CRANKSHAFT	for 1.8L	Full-C.W. 83.00mm [+6.00]	TA204B-TY01A
2JZ-GTE	STROKER KIT	3.4L	TOMEI BORE: 87.00mm [+1.00]	TA201A-TY03A
			CP BORE: 87.00mm [+1.00]	TA201A-TY03AP
			TOMEI BORE: 86.50mm [+0.50]	TA201A-TY03C
		3.6L	TOMEI BORE: 87.00mm [+1.00]	TA201A-TY03B
			CP BORE: 87.00mm [+1.00]	TA201A-TY03BP
			TOMEI BORE: 86.50mm [+0.50]	TA201A-TY03D
	PISTON	for 3.4L	TOMEI BORE: 87.00mm [+1.00] CH 30.00mm [-4.00]	TA202A-TY03A
			CP BORE: 87.00mm [+1.00] CH 30.00mm [-4.00]	TA202A-TY03AP
			TOMEI BORE: 86.50mm [+0.50] CH 30.00mm [-4.00]	TA202A-TY03D
		for 3.6L	TOMEI BORE: 87.00mm [+1.00] CH 29.50mm [-4.50]	TA202A-TY03B
			CP BORE: 87.00mm [+1.00] CH 29.50mm [-4.50]	TA202A-TY03BP
			TOMEI BORE: 86.50mm [+0.50] CH 29.50 mm[-4.50]	TA202A-TY03E
		for 3.0L(STD)	TOMEI BORE: 87.00mm [+1.00] CH 34.00mm [+-0.00]	TA202A-TY03C
		for 3.0L(STD)	TOMEI BORE: 86.5mm [+0.50] CH 34.00mm [+-0.00]	TA202A-TY03F
	CON-ROD	for 3.0L(STD)/3.4L	142.00mm [+-0.00]	TA203A-TY03A
	CON-ROD	for 3.6L	139.00mm [-3.00]	TA203A-TY03B
	CRANKSHAFT	for 3.4L	Full-C.W. 94.00mm [+8.00]	TA204B-TY03A
	CRANKSHAFT	for 3.6L	Full-C.W. 100.0mm [+14.00]	TA204B-TY03B
1JZ-GTE	CON-ROD	for 2.5L(STD)	125.25mm [+-0.00]	TA203A-TY04A
SUBARU
EJ25	STROKER KIT	2.6L	TOMEI BORE: 99.75mm [+0.25]	TA201A-SB02A
	STROKER KIT	2.6L	CP BORE: 99.75mm [+0.25]	TA201A-SB02AP
	PISTON	for 2.5L(STD)/2.6L	TOMEI BORE: 99.75mm [+0.25] CH30.70mm [+-0.00]	TA202A-SB02A
	PISTON	for 2.5L(STD)/2.6L	CP BORE: 99.75mm [+0.25] CH30.70mm [+-0.00]	TA202A-SB02AP
	CON-ROD	for 2.6L	127.80mm [-2.70]	TA203A-SB02A
	CON-ROD	for 2.5L(STD)	130.50mm [+-0.00]	TA203A-SB01A
	CRANKSHAFT	for 2.6L	Full-C.W. 83.00mm [+4.00]	TA204B-SB02A
EJ20	CON-ROD	for 2.0L(STD)	130.50mm [+-0.00]	TA203A-SB01A
MITSUBISHI
4G63	STROKER KIT	2.2L	TOMEI BORE:86.00mm [+1.00]	TA201A-MT01A
			CP BORE:86.00mm [+1.00]	TA201A-MT01AP
			TOMEI BORE:85.50mm [+0.50]	TA201A-MT01C
		2.3L	TOMEI BORE:86.00mm [+1.00]	TA201A-MT01B
			CP BORE:86.00mm [+1.00]	TA201A-MT01BP
			TOMEI BORE:85.50mm [+0.50]	TA201A-MT01D
	PISTON	for 2.2L/2.3L	TOMEI BORE:86.00mm [+1.00] CH 31.65mm[-3.35]	TA202A-MT01A
			CP BORE:86.00mm [+1.00] CH 31.65mm [-3.35]	TA202A-MT01AP
			TOMEI BORE:85.50mm [+0.50] CH 31.65mm[-3.35]	TA202A-MT01B
	CON-ROD	for 2.0L(STD)/2.2L	150.00mm [+-0.00]	TA203A-MT01A
	CON-ROD	for 2.3L	147.00mm [-3.00]	TA203A-MT01B
	CRANKSHAFT	for 2.2L	Full-C.W. 94.00mm [+6.00]	TA204B-MT01A
	CRANKSHAFT	for 2.3L	Full-C.W. 100.00mm [+12.00]	TA204B-MT01B
4B11	STROKER KIT	2.3L	TOMEI BORE: 87.00mm [+1.00]	TA201A-MT02A
			CP BORE: 87.00mm [+1.00]	TA201A-MT02AP
			TOMEI BORE: 86.50mm [+0.50]	TA201A-MT02B
	PISTON	for 2.3L	TOMEI BORE: 87.00mm [+1.00] CH 27.40mm [-6.00]	TA202A-MT02A
			CP BORE: 87.00mm [+1.00] CH 27.40mm [-6.00]	TA202A-MT02AP
			TOMEI BORE: 86.50mm [+0.50] CH 27.40mm [-6.00]	TA202A-MT02B
	CON-ROD	for 2.0L(STD)/2.3L	143.75mm [+-0.00]	TA202A-MT02B
	CRANKSHAFT	for 2.3L	Full-C.W. 98.00mm [+12.00]	TA204B-MT02A

25Jun2023-07-24

By TOMEI USA

ULTIMATE RB26 2.8 SHORT BLOCK !

All new cylinder blocks produced by new casting molds under the Nissan Heritage Program are used. You can select from two versions, N1 and standard version. There is a large difference in price between the N1 and the standard, but we recommend the standard for the general street use. For those who want to participate in drag races, full-scale races, and for those aiming for extreme power, we recommend the N1 which has even higher strength. Currently, it is difficult to obtain new blocks from Nissan Motor, but TOMEI has secured several units, so we are able to produce more, but please understand that the quantity is limited.

The crankshaft used is a forged billet full-counter crankshaft. The stroke is 77.7mm, which is a stroke increase of 4mm from the standard 73.7mm, delivering powerful torque. The counterweight has been changed from the standard 8 counter to a 12 counterweight with excellent balance ratio to achieve higher rotation and power, reducing the burden on the bearings and improving the durability of the engine.

The connecting rod is 119.5mm, which corresponds to the increased stroke compared to the standard 121.5mm, and is a forged H-beam design that achieves both lightness and strong durability with even stress distribution to the bearings. The connecting rod bolts used are L19 from the reliable American company ARP. Although they are more expensive than general ARP2000, they are extremely durable and have excellent reliability.

The piston is 87mm, which is 1mm larger than the standard 86mm, and the material is lightweight and strong A4032 forged aluminum alloy. The specified clearance of 0.05mm can be achieved by the material and the oval barrel design. It is the world’s best piston with excellent sealing performance, power retention, overwhelmingly low engine noise, less stress on piston rings, and outstanding durability.

The main studs and head studs are made by the trusted American company ARP. During machining work for engine boring and honing, work is performed after tightening the ARP studs to the specified torque on the torque plate and the crank caps. As a result, when the actual cylinder head is placed on the vehicle, the deformation of the cylinder block is extremely suppressed, and the appropriate piston and bearing clearance are ensured, providing maximum peace of mind. If these procedures are not made, there is a possibility of clearance error, with abnormal noise and decrease in engine durability.

Nismo bearings are used for both the main and connecting rod bearings and are carefully assembled by a veteran engine builder who has been building RB26 for over 30 years and are measured under a well-maintained environment with optimal temperature control giving it an outstanding sense of reliability.

Before assembling the short block, it is necessary to perform boring and honing work for enlarging the cylinder bore to match the +1mm oversized 87mm pistons. The machining work is outsourced to Diamond Engineering in Tokyo. Diamond Engineering is a world’s top level machining company, specialized in race and tuning engines, requested by many race engine builders and tuning shops in Japan. They have a track record of few thousand, if not more of RB26 engines.

Torque plate dedicated to RB26 is attached before beginning the actual machining work. If an actual cylinder head is left attached, the blade of the machine will not go through, so a torque plate with holes like this will be used. This torque plate is thick and heavy as shown in the photo and reproduces the actual cylinder head of RB26 as much as possible. Then machining is performed with outstanding precision after tightening the ARP studs that we use with the specified torque.

At Diamond Engineering, Mitutoyo measuring instruments are used to carefully measure each piston to be used one by one in a temperature-controlled room before the bore machining process to carefully achieve the perfect size, one bore at a time.

On the block side, in order to ensure that the angle installed on the machine is correct, the parallelism is thoroughly checked, and the angle of the machine and blade is adjusted. Extremely high-level precision work is carried out by the hands of the ultimate super-skilled craftsmen.

This figure demonstrates the gap if these tasks are neglected. There are lot of experience in Japan and are aware of this kind of phenomenon and are improving upon it. Overseas machining companies often neglect these tasks, resulting in many tuning engines with short engine life and loud engine noise. At TOMEI USA, we have thoroughly verified and confirmed the deviation, and high-level short block is achieved by matching perfect machining with the high-precision pistons.

The order of process is boring to roughly enlarge the block, and then honing to determine the performance of the engine. Detailed bore size and fine groove that also serves as a fine oil passage called crosshatch is achieved by honing.

The craftsmen at Diamond Engineering take numerous measurements repeatedly to ensure the perfect finish without compromise.

This small groove is the crosshatch. This angle and roughness are trade secrets, but they are important factors for reducing resistance and noise to the piston. If it has a shiny mirror finish, oil will not enter and will seize and cause a failure. There believed to be only a few machining companies in the world that can perfectly match the finish for the RB26.

Regarding honing. As for further information, Diamond Engineering uses a high-tech finish called plateau honing. As shown in the figure, the finish that removes this apex greatly reduces aggressiveness to pistons and piston rings. And this allows for quiet and smooth engine rotation.

The engine is assembled at TOMEI USA headquarters in Japan by a veteran engine builder who has built RB26 engines for over 30 years. First, burrs are carefully removed from the block after processing.

After machining, metal shavings from the cutting machine remain in the water line and oil line. We take the time to thoroughly wash these with a dedicated machine with the hands of an engine builder. If the engine is started with such metal shavings remained in the engine, it will damage the bearings and pistons, and in the worst case it will lead to engine failure. At TOMEI USA, engineers who cannot properly clean the engine are not allowed to assemble the engine, and we proceed carefully as we regard this step as the most important work of engine assembly.

We measure the weight of each component such as pistons and connecting rods one by one in pursuit of appropriate weight balance arrangement.

The crankshaft is balanced individually, and straightness is checked so that there is no bending, and the vibration is suppressed to its utmost state. Combined with 12 full counterweights, amazing stability, and quietness even at high revolutions is achieved.

High precision Mitutoyo measuring equipment is used to measure the bearing clearance with the utmost precision in a location that is well-controlled for temperature and air management.

After measuring the weight of the piston and con-rod assembly, compatibility is balanced and matched.

When installing the piston ring to the piston, it is very important to adjust the piston ring gap. Too tight of a gap will result in galling damage, and too wide of a gap may result in a blow-by. TOMEI USA utilizes the skills of skilled craftsmen to achieve the highest level of sealing performance with tightest gap possible.

A dedicated engine assembly lubricant is used for bearings and other components to suppress galling before the oil completely circulated upon engine installation.

Next is the tightening of the main studs. These are carefully assembled one by one taking equal amount of time with the specified torque in correct order. Then crankshaft is rotated and checked. As a result, smooth rotation is felt even when turned by hand.

And finally, the pistons/con-rods are inserted into the cylinder block and attached to the crankshaft. TOMEI USA manufactures and uses special jigs and carefully incorporates them into the engine one by one.

A laser marked serial number is engraved on each short block. Also comes with serial plate with the same number packed separately. The plate itself can be affixed to the vehicle such as the radiator core support and functions as proof.

The short block is also equipped with an owner’s book that authenticates the short block. Detailed contents are listed, and serial number is marked. By being able to authenticate the high level of quality, the next owner or car dealer can be informed at the time of sale of the vehicle, and possibly being assessed at a higher price.

Completed in a sturdy dedicated wooden crate with the TOMEI logo and serial number. And we can ship all over the world. We have completed two of each N1 block and standard block specifications, totaling four units have been completed and have already been transferred from Japan to the USA. Currently, it is difficult to obtain new blocks from Nissan Motor, but TOMEI has secured several units, so we are able to produce more, but please understand that the quantity is limited.

PART No.	PRODUCT NAME	MSRP(USD)
TA102A-NS05A	SHORT BLOCK RB26DETT 2.8 FULL COUNTER STD BLOCK RB28SB/FS INVENTORY→	$15,000.00
TA102A-NS05B	SHORT BLOCK RB26DETT 2.8 FULL COUNTER N1 BLOCK RB28SB/FN INVENTORY→	$20,000.00

TOMEI The Engine Specialist:RB20/RB25 Camshafts<br>

22Jun2023-06-22

By TOMEI USA

TOMEI The Engine Specialist:RB20/RB25 Camshafts

Great news for Skyline GTS, Laurel, Ceffiro and Stagea fans!

TOMEI has re-released camshaft for RB20/RB25, designed using the latest technology, the highest performance and quietness are achieved. These are already available in stock, and the related parts are also ready now!

ENGINE	IN/EX	Type	DURATION	CAM LIFT	PART NO.	PART NO. (SET)
RB20DE(T)	R31/R32, LAUREL C33 CEFFIRO A31	IN	258	8.5	TA301D-NS07A	TA301B-NS07A
		EX			TA301F-NS06A
		IN	272	10.25	TA301C-NS07A	TA301A-NS07A
		EX			TA301E-NS06A
RB25DE(T)	R33 EARLY LAUREL C34	IN	258	8.5	TA301D-NS06A	TA301B-NS06A
		EX			TA301F-NS06A
		IN	272	10.25	TA301C-NS06A	TA301A-NS06A
		EX			TA301E-NS06A
	R33 LATE	IN	258	8.5	TA301D-NS06A	TA301B-NS06B
		EX			TA301F-NS06B
		IN	272	10.25	TA301C-NS06A	TA301A-NS06B
		EX			TA301E-NS06B
RB25DET NEO 6	R34 GT-T LAUREL C35	IN	254	9.15	TA301C-NS06B	TA301A-NS06C
		EX			TA301E-NS05B
		IN	262	9.15	TA301C-NS06C	TA301A-NS06D
		EX			TA301E-NS05D

Movie : Speed Academy BNR34 GT-R Gets TOMEI Fuel Pump

22Jun2023-06-16

By TOMEI USA

Movie : Speed Academy BNR34 GT-R Gets TOMEI Fuel Pump

Awesome Episodes by Speed Academy TOMEI Fuel Pump “FIRST START of the R34 Skyline GTR is GLORIOUS!“ Full length original footage is here Speed Academy – YouTube

13Apr2023-06-16

By TOMEI USA

LAST PRODUCTION! FUEL PUMP RB SERIES

Only 100 in stock per model!
This is the last run of the TOMEI fuel pumps.
They will never be for sale again!

APPLICATION	PART No.	PRODUCT NAME	MSRP(USD)
BNR32	TB503A-NS05A	FUEL PUMP BNR32 INVENTORY→	$600.00
BCNR33	TB503A-NS05B	FUEL PUMP BCNR33 INVENTORY→
BNR34	TB503A-NS05C	FUEL PUMP BNR34 INVENTORY→

PART No.	FLOW RATE	DIAM.	LENGTH	INHALATION	ACTUATION	SHAPE
TB503A-NS05A	276L/h (@ P=3.0kg/cm2) (STOCK 195L/h)	φ56	151mm	Directly attached to the strainer	Roller Vane type	Same as Nissan Genuine
TB503A-NS05B		φ61	174mm	9mm hole and strainer
TB503A-NS05C		φ61	174mm	9mm hole and strainer