LS1NOVA

iTrader: (12)

For your goals, Id use two Aeromotie 340's in the tank, a -8 feed, a boost referenced regulator, the LS2 rails you have, the stock feed as the return, and a good fuel filter such as a big Magnafuel or a Kinsler Monster Mesh.

DietCoke

iTrader: (18)

30-35%. I'm running e85.

AlterEgo

iTrader: (9)

ouch! those aeromotives are $175 each! hope I can find some lightly used... I just bought the aeromotive 13109 regulator.. I hope it will work with it..

now, I gotta find some inexpensive 80lb or 95lb injectors... I wish 60 would be big enough.. I found some on CL for 300 brand new in box. I gotta find a stock feed line, the one I have was cuz pulling the 4.8 out of the donor tahoe.

AlterEgo

iTrader: (9)

30-35% more fuel! I gotta read up on e85 again to see WHY it is good to run it over pump gas with a boosted motor... GEEZ!! I will be driving gas station to gas station.

DietCoke

iTrader: (18)

Alcohol burns cooler, in addition to the higher octane and larger amount of raw fuel being injected (Again, lowers temps) benefits a boosted motor greatly.

Nasty N8

iTrader: (33)

10.2to1 air fuel for E85 verse 14.7to1 for gas gives about 33% more fuel volume. 700hp will need about 1000hp worth of fuel. Give us a call we can help you spec out your exact system for your needs.

Nasty N8

iTrader: (33)

Oh and to the original question stock fuel rails start to become a restriction about 600whp.