Hi i have a 89T/A with the 350 engine. I have the tpi setup with 305 injectors. The guy i bought it from says he put on a fuel regulator on it. I wanted to see what its set at but where is it located and how do adjust it?I heard that if its adjusted to about 50 psi i can get more hp from my car. Any info would be appraciated thx

 

I will try to help you. Most of the people on this board will think this is a lame question. The fuel pressure regulator is just in front of the distributor. It is on an angle. If it is an ajustable one it will have some sort of bolt or allen nut in it.

 

also put the bigger injectors back in your car, those 305 injectors aren't gonna cut it when you start modding your car, it prob doesn't even cut it right now at WOT

 

It all depends on what year "305 TPI injectors" he has. Gm used 17# injectors on 87and later TPi cars. If I am correct, please let me know if i'm wrong, Gm used 19# injectors in the 305 and 350 F-body 88 on. I know my 91 came with 19# injectors stock. The corvette came with the 22# injectors from the factory.

 

Here ya go. Usually the adjustable ones have a screw or hex head you can screw in or out to adjust the pressure.

David

 

no, thats wrong. all 305's had a 19# and 350's came with 22#... even with 50psi it only increases the fuel to push teh 19's to about 21's, which isnt enuff for the 350. Id go with 22's or 24's if you plan to mod it anytime soon. I ave 19's in my car... Vettes came with 22's. Lt1's came with 24's and LS1's come wth 26's.

 

Are you sure? I know for a fact that GM put 17# injectors in the 86-87 IROC,s.

 

All infomation on 305 FI injectors are for 19#. GM did not use a 17# injector on the 305 TPI. What is the part number? And for a fact my 1987 305 had 19# FI.