Anyone know if a 94+ Supra Twin Turbo fuel pump is sufficient enough for a 2gnt with a turbo kit. I plan on running 310cc or 370cc injectors with a SFMU. I hear they flow like 260lph and the 4G63 guys use them as a cheap upgrade.

I can't comment on how good the Supra pump is, but I can give you a word of caution. Find a performance chart for the Supra pump. Something that charts flow vs pressure. RC engineering may be able to help since they test fuel pumps and may have the data already. Pumps on factory turbo cars flow alot of fuel at low pressures (since those cars use big injectors), but they often flow very little fuel at high pressures. 310's or 370's will let you run decent fuel pressures, but you should still make sure that the pump can supply enough fuel at whatever pressure you choose.
See this page for further explanation:
http://www.geocities.com/vttalon/tech.html


Corbin

'95 ESI-T
HRC+FMIC+ETC...



Gimme fuel...Gimme fire...Gimme that which I desire

I'm running a '96 TT Supra fuel pump now with my stage iv. It seems to flow well, but I haven't datalogged my current setup yet. Currently, my Autometer air/fuel gauge is at the 2nd from the richest blinker, and that's with some leaning of the fuel system with a Crane Power Tuner. On a long pull, my egt reads about 1450-1500 degrees F. I hope to put my car on a dyno and datalog my runs within the next week or so; that way I will know for sure whether the Supra pump has good flow vs. pressure.

When I had the 370cc's, an S-AFC and the Supra pump, I was running so rich at 10 psi boost. I had to lean my fuel from -22% to -35% throughout the rpm bands. I don't have any doubt that the Supra will do the job at 8-10 psi.

If anyone has a flow chart of the Supra fuel pump, please post it; I'd really like to see how it compares with the Walbros, Holleys, etc.

Kon,
Let me know when you are going to dyno tune your car. I would like to be there.

Yup, I'll you guys posted.