So i was wondering if i need a aftermarket fuel pump or can i use the stock one with my mods
2007 classic 6.0 228/232 243 heads 232cc advanced induction port job
Tbss intake 8.1 marine injectors
And so on lol i made 402 hp on 2nd gear pull due to stock driveshaft
Will my stock fuel pump be sufficient or should I consider a aftermarket one
Any info is greatly appreciated guys

 

If you have the flex fuel system you will be fine up to 500 or so.

 

No flex fuel how much hp are stock pumps able to hold?

 

Not much...350 on a good day.

 

Right on
Any thought on any good aftermarket ones?

 

If you dont plan on boost a walbro 255 would put you at 550ish and a walbro 400 would put you at 700ish.

 

Cool thanks for ur knowledge my man

 

Your injectors would max out at probably 400 though...

 

When i got it tuned he said i was no where near maxing out the 42lbs

 

Yea, I was a little off just shooting from the hip.

42lb@4bar injectors will do roughly 475rwhp at 60psi at 95% IDC.

At 60psi NA,
Walbro 255 will support ~530rwhp
Walbro 400 will support ~800rwhp
Walbro 450 will support ~900rwhp

Check out the stickied thread in the top of the fuel section for a spreadsheet I made that does all this.