6togo

iTrader: (13)

I'm putting together a LS6 that will hopefully get close to 500whp what fuel pump and injectors will i need? Will a walbro 255lph and 36lbs do it or will i need more?
Also what is the difference in the 98' F body fuel system compared to the 99-02's?

Atomic

iTrader: (37)

You will need more injector than that...I would go for 48s or 60s.

93LS1S10

iTrader: (19)

I dyno'd my truck today. It made 462whp on 7lbs of boost. It ran out of fuel up top. Im running a walbro 255 with 42lb injectors. Im switching to a Walbro 400 and 60lb injectors.

Mrmooney

iTrader: (9)

I would think 60's and 1 walbro 255 would be plenty.

6togo

iTrader: (13)

This is why i'm asking i did search and got lots of different results i originally thought 60's and a single walbro but most reported 30-36's did the job easy being the system is 58lbs.

Atomic

iTrader: (37)

Well since you plan to do this NA you can get away with a smaller injector and pump than the boost guys. Still, 48s are the smallest I would run, and may consider a bigger pump like a walbro400.

6togo

iTrader: (13)

Well i emailed Racetronix today and they said their f98 255lph pump kit and siemens 60lb injectors will handle the job. Injectors seemed still a bit big considereing they will probably have a higher lb rating at 58psi but i'm no expert here!