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I've noticed for some time now my fuel pressure at WOT is 50 psi, idle is 44-46 psi. I have a walbro 255 high flow pump and 36lb injectors tuned with HP Tuners. No problems with misfires or any codes. Have a VS cam, run nitrous once and awhile with a 125 wet shot, no issues. Wideband is working showing 12.7 to 12.8 N/A and 11.8 to 12.0 on the nitrous with the fuel pressure still at 50 PSI at WOT. I think in the Tech pages it says WOT should be 55 PSI at WOT. My Vac. was showing 16-18 ar idle which is pretty normal for the cam and 20 to 22 while crusing. With the 36lb injectors in at WOT I'm at 56%-58% injector duty cycle. Anyone think there is something wrong some where with the fuel pressure reg. of the walbro pump? Or is this normal since I have no issues. Also all O2 sensors where just replaced.
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08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine -
Re: Fuel pressure at WOT?
within 10 psi is normal they normally give you a span of acceptable pressure -
Re: Fuel pressure at WOT?
Thanks auto666, that makes me feel alot better.08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engineComment
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