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ADJUSTABLE FUEL PRESSURE REGULATOR  
 

FUEL UPGRADE REQUIREMENT

When the injectors and fuel pump are upgraded to a larger flow setup the stock fuel pressure regulator will not be enough to suit the required pressures for the new setup. Also the stock is already preset to from factory for the standard setup and non adjustable so it will be restricting the tuning potential of the car. The TOMEI Fuel Pressure Regulator will ensure stable pressures are supplied with the oversized diaphragm. This special design has proven to maintain the required pressure levels with any adjustments made.
 
FUNCTION & FEATURES  
Made from billet aluminum with a hard anodized finish to cope with the extreme conditions in the engine bay while maintaining great looks.
 
HARD ANODIZED FINISH
The Hard Anodizing finish adds more protection to the Regulator since the Regulator will spend itfs time in a harsh environment. This finish helps protect the thick membrane from harmful grit and grime and with the additional resistance to corrosion and heat and electrical insulation these aspects help maximize its durability and safety.
AN6 1/8~2 / #8 STRAIGHT 1/8NPT~2 FITTINGS
Our Regulators are supplied with 2 of each AN6 and #8 nipple connectors which are the most popular type of fitments for fuel piping. Ready to install and use from the box. *Depending on your setup you may require additional equipment/parts to complete the install.
* Other piping is required and not included.
 
SPECIFICATIONS  
 
TYPE
REGULATORS
BODY
SURFACE
FINISH
WEIGHT
(With
Bracket)
DIAPHRAGM
DIAMETER
VACUUM
HOSE
NIPPLE
FITTING
PARTS
PRESSURE
ADJUSTABILITY
S
Aluminium
Hard
Anodized
155g
33
4.5
EAN6 1/8NPT x2
E#8 Straight
1/8NPT x2
2.0kgf/cm²~
8.0kgf/cm²
L
270g
50
KIT CONTENTS
Fuel Pressure Regulator (x1) / AN6 1/8NPT (x2) / #8 Straight 1/8NPT (x2)
 
FOR GENERAL TUNING
NbNŊg
TYPE
PART NUMBER
MSRP
TYPE S
185001
$120.00
(USD)
FOR HIGH FLOW, BIG POWER & HIGH BOOST
NbNŊg
TYPE
PART NUMBER
MSRP
TYPE L
185002
$180.00
(USD)
 
 
ADJUSTABLE FUEL PRESSURE REGULATOR  

When the engine is idling low the fuel flow used compared to full power is only approx 15%. Therefore most of the fuel that is sent by the pump will be returned to the fuel tank. When the engine is tuned the optimum efficiency can be obtained with the optimum mixture of A/F ratio. When the fuel pump is too large and the regulator is not strong enough to handle the excess fuel that it is receiving it will then not be able to regulate the flow to allow the fuel to return to the tank. This will cause the fuel pressure to be too high and too much fuel to be pumped into the engine which will lead to over enrichment and poor fuel efficiency and a variety of problems will occur.

 
Click to enlarge
Click to enlarge
* When the fuel pressure changes from 0.5kgf/cm2 it greatly affects the settings due to the A/F difference will change from 0.5 or more.
 
 
Click to enlarge
When the adjustable fuel pressure regulator is set to optimize the injectors the best fuel consumption and burn ratio can be achieved.
* Low Fuel Pressure Inefficient Fuel Supply. Poor Fuel Consumption.
   
* High Fuel Pressure * Operational Problems e.g. Solenoid Failing to Close.
The optimum fuel pressure is then maintained and controlled by the change in pressures from the intake manifold.
 
The balance of pressure inside the regulator (Pf+Pm=F/S) maintains the fuel pressure from when the valve opens by the pressure in the intake manifold.
RPM PRESURE BOOST DIFFERENCE
2500 3.82 0.70 3.12
3000 4.49 1.42 3.07
3500 4.53 1.47 3.06
4000 4.48 1.47 3.01
4500 4.46 1.45 3.01
5000 4.42 1.44 2.98
5500 4.39 1.41 2.98
6000 4.33 1.38 2.95
6500 4.26 1.30 2.96
7000 4.20 1.25 2.95
 
The TOMEI Design Maintains Pressure,Safely and Securely.
 
 
REGULATOR ADAPTER  
 

NO.1
PART NUMBER MSRP
185106
$18.00
(USD)
NISSAN 
BNR32E34/BCNR33 RB26DETT
R32 RB20DET
R33/R34 RB25DET
(R)PS13/S14/S15 SR20DET
Z32 VG30DETT
SUBARU
GC8/GF8 EJ20G/EJ20K
EJ205/EJ207
GDB/GDA EJ205/EJ207
BC5/BF5 EJ20G
BD5/BG5 EJ20H/EJ20R
BE5/BH5 EJ206/EJ208
SF5/SG9 EJ20G/EJ205
EJ255
TOYOTA
EP82/EP91 4E/FET
JZS147 2JZ-GTE
JZA80
(Excluding ~'97 Aug VVT-i)
2JZ-GTE
`d86 4A-GE
SXE10 3S-GE

NO.2
PART NUMBER MSRP
185107
$18.00
(USD)
TOYOTA
JZX90 1JZ-GTE
JZX100 1JZ-GTE
JZX110 1JZ-GTE
ST205 3S-GE
SW20  3S-GE
NO.3
PART NUMBER MSRP
185108
$18.00
(USD)
MITSUBISHI
EC5W 6A13
CD9A/CN9A 4G63
CP9A/CT9A 4G63
Z16A 6G72

NO.4
PART NUMBER MSRP
185109
$18.00
(USD)
HONDA
EF3/EF9 B16A
EG6/EG9 B16A
EK4/EK9 B16B
EG2/EF8 B16A
DC2 B18C
DC5 K20A
AP1 F20C
NA1 C30A
NA2 C32B

NO.5
PART NUMBER MSRP
185110
$28.00
(USD)
MITSUBISHI
CZ4A 4B11
 
 
FITTING PARTS  
 
AN6 1/8NPT
PART NUMBER MSRP
185105
$10.00
(USD)
#8 STRAIGHT 1/8NPT
PART NUMBER MSRP
185103
$7.00
(USD)
#8 ELBOW 1/8NPT
PART NUMBER MSRP
185104

$18.00
(USD)