Quick fuel pressure question....

[Super Phil]

I have a stock turbo/IC/etc.. I am running 13lbs. - 15lbs. of boost. I have a Walbro fuel pump and an Accufab AFPR. What should I set my fuel pressure at??? (For street driving)

Phil

 

[Russ Merritt]

42-45 with the vaccum line off should get you in the ballpark. you didn't say who's chip or if you had a scan tool.

 

[Super Phil]

Oh yes.....stock chip and I don't have a scan tool.

Maybe a stupid question, but what do you mean "with the vacuum line off'??

 

[Russ Merritt]

Don't worry about it, The vaccum line on top of the regulator, take it off when you adjust the pressure 42-45#, then put it back on and ZIP TIE IT!!! so it won't come off under boost.

 

[87gnstock]

I have another question i was running about 16lb's of boost but the ecm kept cutting back my timing. I checked it and with line on i had 39lbs of fuel pressure. I know this doesn';t sound right. How much should my fuel pressure be for stock injectors?

 

[Russ Merritt]

That sounds about right (36-38#) with the line on. make sure there are no leaks in that line, If your fuel press with the line off is say 45# then with 16# of boost it should be around 60ish