Stock fuel pump

[WDRacing]

Just to let you guys know, I'm running the stock pump, broke my Holley...long story, It runs great at 12 lbs of boost with 45 psi base pressure. I'm using 42lb injectors and a huge rail, and the pump is doing a fine job. My AFR's are 11.3 till I get over max torque, about 4500, and then I leaned it out myself to run 12.1 up to 6500.

So if your not using a FMU, then the stock pump is good for quite a few lbs of boost.

Just figured I'd post the info...the "must replace the fuel pump to run boost" theory isn't as strict as we thought.

WD

[Craving4Boost]

interesting....im about to run 370cc's with an SAFCII with 8psi of boost on a t3/t4. your saying my stock fuel pump will do fine? even 10psi

[WDRacing]

Mine is...

[Jookmasta]

well the ka-t i lost to is running 12 psi on his t3/t4 with sr injectors and a stock pump. He's been doing it for about 6 months i hear........

[WDRacing]

I also ran 15 psi on my Skyline with the stock pump, everyone said I couldn't do that either, did it for a year.

[Structure240sx]

awesome that just made my s13 sohc cheap ghetto turbo project $100 cheaper

[:: orion ::]

S14 fuel pump is significantly better than S13 fuel pump...

I have seen stock SR's lean out at stock boost with OEM S13 pumps...but I've seen an OEM S14 pump run ~12psi on a KA-T.

Should be noted...this *may* hold true for S14s, but DO NOT attempt boosting...espcially using an FMU...with a stock S13 pump.

- Brian

[Bronze MFP]

Great info. i have a walbro pump, but would rather not tear into my gas tank if i dont have to (lazyness). Maybe i'll never need it, who knows. thanks WD