deucesallin

Can anyone confirm that this the order of fueling problems on a bone stock GenIV FFV 4.8L truck motor runing boost and E85?

1) INJECTORS & PUMP finish around ~400ish WHP
2) FPR then gets overpowered by the new pump/pumps
3) LINES & RAILS (if still stock by then) domt need attention until 700-ish?

So a large drop in pump+FPR+returnless fuel system conversion should get me close to 700whp on factory rails and lines?

-asking for a friend,

JoeNova

Something like that.

deucesallin

With HP Tuners to control the factory FPR and pump, how much boost can I run without an external regulator?

I would like to get this thing running under boost, even at 6 or 8 PSI and play with HP Tuners before stepping up the fueling and valvetrain. Whats the simplest method to get there with a bone stock FFV GenIV?

Thanks,
Jake

Kjduvall

Walbro 450, convert to an lines , in line flexfuel sensor, and appropriate injectors. With aeromotive boost refranced regulator. And pull out the fuel pump controller. And replace with a hot wire kit. That's how I did mine and it's stupid reliable!!!