Does anyone know the "factory" fuel pressure at the fuel rail? My scan gauge does't pick it up.

 

54-58 lbs, took a stab at the service manual.

 

That was fast. The GM tech I know couldn't give me that. Thanks.

 

with a stage 2 kit how much can u up the amount of fuel and retard ur timing before it starts to hurt u?

 

Why would you do such a thing?

 

Yeah the actual fuel pressure varies, but it is rated at 58psi.

The Stage 2 injectors are maxed out already on that tune. The Stage 3 tune has updated fuel tables that provide a little extra head room.

Since you're asking about adding fuel and retarding timing, are you considering nitrous?

 

I am running a 35 hp "wet kit" with my stage 2 gm tune. Seems to be good and safe without retarding the timing.