well guys nobody on the chevy sites seem to know, so maybe someone here can help me. ive got a 95 chevy tahoe, i bought an adjustable fp/ regulator from cfm-tech. the site states that stock pressure is anywhere from 9-13 psi, and that they recommend running around 14 psi. well my tahoe has 17 psi with the stock regulator, and i dont know if i should still run more pressure. it just so happens that the day i need help, they are closed. anybody know? thanks

 

Do you do any datalogging?

If everything runs well at 17psi, leave it at 17, if your running rich at 17, drop it a couple. if you are a hair lean at WOT, raise it a hair.

Not sure what exactly you are asking, there is not 'perfect' pressure, it varies from car to car.

 

Why did you buy an adjustable fpr? Have modded your exhaust etc?

 

no datalogging eqipment other than tech 1. been pulling plugs to check, not sure how accurate this is though. the truck has cold air, ported throttle body, injector/throttle body spacer, thorley headers and magnaflow exhast. really wanted the adjustable regulator for future mods when more fuel will be necessary.

 

i understand the GM TBI prior to 1995 runs approx 13 lbs? now i can only comment on 454 truck TBI as i have one(1995) and it came new with 45 lbs injectors(took a while to fiqure that out) and the GM dealer said it was designed to be run at 26-32 lbs. not sure what a 350 cid runs at.

 

anybody know?

 

see Dewey's comment.