06 4.8

iTrader: (5)

So i have been reading alot and it seems the 05+ systems are different than the older models. Ive got a cammed LQ9 in the truck now thats getting a 76mm front mount setup in a few weeks with 6 psi to start. Ive already decided on 72lb injetors.
My main question is on which pump to use. This truck is my DD and i take decent trips with it, i dont want to have to worry about filling up as soon as I get to 1/2 tank. I was looking at the aeromotive 340 but read alot on here where some were failing. Which pump should I go with thats going to be a drop in style that I can use factory fuel lines with? I will be running a racetronix hotwire also.

Atomic

iTrader: (42)

How much power are you looking to make? The 72s are going to limit you to about 650rwhp or so depending on how much boost you push regardless of what fuel pump you have. A walbro 400 would be my vote as it sits.

06 4.8

iTrader: (5)

Im thinking this cammed lq9 will make in the 550 whp range on about 7 psi. I just went with 72s incase i do want to turn it up.
will the walbro 400 fit in the stock bucket modified and using stock lines?

GMCtrk

iTrader: (27)

No reason not to use Walbro 450 over 400. Minimal increase in price, but allows for E85 if you want in the future and also has increased output over the 400.

Atomic

iTrader: (42)

You will need to redo the line going to the filter/fpr in the bucket but thats not hard to do, make sure you use submersible fuel hose though.

06 4.8

iTrader: (5)

Thanks for the quck info!

06 4.8

iTrader: (5)

F20000169

This the right 400 I need? Looks like this is the one the return style guys use, is it also the same one for the return less style?

Atomic

iTrader: (42)

No, f90000262 is the walbro400 you want.

06 4.8

iTrader: (5)

possibly f90000262? when I try it with f2XXXX nothing pulls up?

Atomic

iTrader: (42)

Yea, sorry, f90000262

The first one you posted is the old 255.