[KingLT1]

Yes the LPE big bore is worth another 10% in flow volume. I was out the other night when the temps hit the 30's, boost hit 11 psi, and I still had enough fuel system on E67 and no meth. Normally I see around 9psi above 50 degrees.

The LPE has never been a popular choice. In the end it isn't any more expensive then the LT4 + a Meth kit. I believe it's not popular because the early version was not compatible with bigger fuel lobe cams larger then 32%. So the LT4 with a 38% lobe would end up out flowing the LPE pump. Most seem to go right to a cam swap for more fuel. If you want to run a stock cam with E85, then a LPE pump will free up some headroom.

I also didn't need a Auxillary pump.


My fuel system:

LT4 injectors
LPE big bore HPFP
LT4 low side with JMS booster

This fuel setup is so far is working well. I wont push past 11-12psi tops on stock pistons, so i dont plan on touching it unless I do rod/pistons.