Do i need to upgrade my fuel pump ?? See inside

[slydin-cressy-style]

Hi guys

I have a 1J Mx83 with a HKS T04R and am looking at running more boost soon (currently running 8 PSI) but am worried about leaning out with my current fuel pump

ATM i have a Walbro 255lt intank Fuel pump and am looking at running 15 PSI

Will this be sufficient?

Does anyone run the same fuel pump on 15 PSI or maybe even more?

All comments welcome

Josh

[BlitzRacing]

The Walbro pump should be sufficient at 15psi.. it can even support more in most applications.. What is the make up of the rest of you system, especially your injectors?FPR ?

[PlacentaJuan]

keep and eye out for clubs in your area running a dyno day and come along. that way you can get an definate answer for not too much $

[slydin-cressy-style]

Thats just a copy paste of my mods list:

- 1990 MX83 Cressida GL
- 1JZGTE Conversion from Jzx81
- Mod Plated
- HKS T04R Ball Bearing Turbo (1.00 Exhaust housing, 86mm Comp Wheel)
- HKS Stainless Steel heat sheild
- Braided oil feed
- SARD 850cc Injectors
- Microtech LTX12s
- 6 x Individual Bosch Coils
- 8mm Ignition Leads
- Walbro 255lt Fuel pump
- 150amp relay on fuel pump
- 8 Gauge wire to fuel pump
- Microtech DigiDash
- Autotechnica Black Steering wheel
- Autotechnica Boss Kit
- Hybrid 600x300x100mm Intercooler
- Custom Intercooler piping
- High Quality Clamps used all round on Cooler piping
- Twin 12" Flexalite "S Blade" fans
- Custom Stainless Steel Manifold with twin entry t4 flange
- Turbosmart 48mm Progate
- Modified return radiator pipe to position it away from manifold
- Polished Radiator over flow tank
- Century Battery (67EF 450 CCA)
- Battery box mounted in boot
- Full 3" mandrel bent exhaust with 3" black pipe out the back
- 3" Hi-flow cat
- Malpassi Rising Rate Fuel Regulator
- Mechanical Fuel Pressure Gauge
- 4" inlet K&N Air Filter
- Modified water return pipe for turbo to fit the 3" dump pipe
- Heat Shield for Brake booster
- Polished Cam Covers
- Turbosmart Raceport 50mm BOV
- Air con has been removed
- Cusco Strut brace
- Custom 1 Piece tail shaft with thicker wall (supports up to 800hp)
- JZX81 Rotors and Callipers (295mm)
- Brand New NGK Spark Plugs
- R154 gearbox
- OS Giken twin plate clutch
- JZX81 clutch and brake pedal
- Jzx81 clutch master cylinder with heat sheild
- JIC silver series coilovers with 12kg springs in front and 10kg springs in bak
- JAR Custom made alloy radiator

Again, more comments the better

[Norbie]

Should be OK, but install a fuel pressure gauge and keep an eye on it when it's on the dyno. If the pressure starts to drop in the top end you need to upgrade the fuel pump, if not it's all good.

[slydin-cressy-style]

Should be OK, but install a fuel pressure gauge and keep an eye on it when it's on the dyno. If the pressure starts to drop in the top end you need to upgrade the fuel pump, if not it's all good.

I have a Fuel Pressure guage in the engine bay

Best to keep an eye on it anyway durring the run