bigzeb1

I've been trolling on this website for a while now. New to the LS1 scene. I'm currently working on my first car project ever. I have a highly stressed LS1 built by HKE going into a euro car. I like the idea of having instant throttle response but my buddy has the same project, except he is running boost.
I have been doing all kinds of research on nitrous and E85. I have decided, if possible I would love to run E85. So let me tell you about my engine

Its a 5.7 LS1 freshly built.
Stock crank.
LS6 pistons and LS3 rods
12:7 compression ratio
241 heads ported is thin as possible, almost hollow lol
3/8th 7.4 pushrods
lightweight valves
some other valve train goodies for high revs
248-246/.650 .650/113 cam
Fast 92 intake
38 pound injectors

I searched E85 but wasn't able to find much information on whats necessary to convert. To my knowledge it should be very beneficial to my engine since my compression is so high. Could someone please tell me if I can run E85 and if so, what parts do I need? Thanks!

HexenLord

It requires 30% more fuel so size fuel system accordingly. Lots of things need to be E85 compatible. From there its a wideband and tune.

bigzeb1

So bigger injectors and fuel rails should cover it followed by a tune, right? Also, will it be beneficial for me. I thought since I had a high compression ration it would add lots of power.

HexenLord

Stock fuel rails flow more than you'll make N/A. Injectors will need to be resized, and possibly your pump depending on what you're running. The stock lines will be fine also.

How much power you'll make depends on several variables. In most situations, you won't switch to E85 and pick up power. With the right fuel tables, yes you'll gain around 5% power from E85 alone. Even though it contains less energy than gasoline per volume, its stoic ratio is much more rich than gasoline, and therefore the larger amount of fuel required increases the overall energy output above gasoline.

The rest of the power you'll find will be in the ability to run more timing. Its not abnormal to be able to bump timing 5-10* with E85.

maroonls1z

you need to make sure your pump, lines, and injectors are E85 compatible

bigzeb1

Okay. That's very informative! Thank you. I know its hard to tell but could someone give me a ballpark figure of what I may gain if I follow through with it? Is it worth my efforts?

DietCoke

iTrader: (18)

2-3% over pump 93... about 10hp on a 450hp motor

91parkave

iTrader: (4)

The only thing you need to worry about changing out for now is your fuel filter and you need to tune. Wideband is always good. But the only thing you need to change is your stoich value.

https://ls1tech.com/forums/fueling-injection/602091-how-run-your-ls1-e85.html?styleid=26