My car is a heads cam LPE car with 30# injectors and LTs, borla,the fuel pump is a walbro 340s series intank i want to know what i should set the pressure at with the vaccum unpluged or plugged what do you guys set yours at also the car is stock bottom end with custom tuning for the package and reprogrammed for the 30# injectors

 

You didn't say if the injectors were SVO or GM Multech.

What ever, SVO injectors are rated at 39psi and GM injectors are rated at 43psi.

If SVO type, then I'd try 45psi at idle with the vaccum line off.

If GM type, then I'd go with 47 - 49psi at idle with the vaccum line off.

Hope this helps

LWM

 

46.5 to be exact, no vacuum. 30lb SVO's on mine.

Good Luck with it Chris.

 

All you should have to do is bump the injectors up to 31.6 and run stock fuel psi...if I remember right.

 

Where did you guys find this thread (LOL)? Ion changed it in the computer for the bigger injectors and fuel pressure is set at stock 43.5 with vac. off....

Hey gary i put stock heat range plugs in the car and it seems to make a big diffrence..... Did you ever make it back to the track for that 11 sec pass? The injectors are svo injectors... It sucks that you need a ford product to make a chevy run....

 

Sent you email back and no I'm still sitting at 12.02.