fuel pressure #'s stock and modified

[mattymac]

I was needing to know what are you guys getting for your readings with your stock lift pumps at idle? (What is the max PSI of these pumps supposed to be?). And also I was wanting to know for you guys running DD's pump or any other type of aftermarket pumps what are you guys getting for readings as well (Max)? thanks guys!

 

[rbattelle]

I think the stock pressure at WOT is 6-8 psi. Someone will correct me if I'm wrong. I don't have a fuel pressure gauge, so can't speak from experience.

 

[MUDDY]

mine,,,,,,,12 1/2 or so idle,,,,,,,,,6 anna half wot w/dd2s and b-dog prssre boxon low [50hp setting]. dd's pump [hp4601]



goin by memory,,,,,,,,,a friends early 04 has approx 8 at idle and below 0 wot. edge prssr box on 3 [60 hp setting] and dd1s

 

[bpenrod]

Mine was 6 to 8 at idle with the stuff in my sig. (minus the FASS)Pulled down to a vacuum at WOT! Now I the FASS installed and its 16 to 17 at idle and never below 14 at WOT.

 

[Jengle]

My fuel system is stock, I see 7. 5 at idle, and pull down to an even 5 at WOT. I just have the aFe and 4"exhaust. No boxes, or pumps. This is with a Dipricol mech fuel pressure gauge, reading through an isolator. I am also reading it at the hpcr pump inlet side, so this is a post filter reading. I got no change at 10k miles, when I put a new fuel filter in. There was an article several months ago in the TDR on our 3rd gen fuel systems, something like the pump was a 10psi pump.

 

[rbattelle]

My fuel system is stock, I see 7. 5 at idle, and pull down to an even 5 at WOT. I just have the aFe and 4"exhaust. No boxes, or pumps. This is with a Dipricol mech fuel pressure gauge, reading through an isolator. I am also reading it at the hpcr pump inlet side, so this is a post filter reading. I got no change at 10k miles, when I put a new fuel filter in. There was an article several months ago in the TDR on our 3rd gen fuel systems, something like the pump was a 10psi pump.

That's good info, Jengle... thanks! Makes me feel better about not having a fuel pressure gauge.

 

[Jengle]

Your welcome. That's what the TDR is for. Give and get good info. What surprises me, is how many times with this setup that I have to wait a minute or two for the EGT to come down to 300* so I can shut down, and not have to worry about the turbo. It happens enough to wonder why the dealers say you don't need it if youre stock. And how many people are shutting off too hot, because the general consensus says you don't need the gauges if you stay at stock levels.