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E85 on ls3

Old 01-02-2019, 09:20 PM
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E85 on ls3




Hi there guys sorry if I post this on the wrong section.
I am going to be swapping my car into a manual within the next month and while Iím at it I was talking to a buddy and I got convinced on running e85 on my car mainly because I gain a little more power and also the cleaner smell of fumes this is the major reason. I was curious if stock third gen lines handle e85 Iím running N/A ls3 engine with a mild cam I might be sending my heads to get ported and milled especially if I go e85. My main concerns are if stock lines can handle e85 for say 500-550rwhp. I am running ls1 gas tank with braided lines to stock fuel filter. I know I will need a e85 compatible pump and bigger injectors for sure. Any help Iíd appreciate guys. Btw hereís some pics
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Old 01-02-2019, 11:40 PM
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Re: E85 on ls3

Recommend flex fuel, so you can still run normal octane. Not sure if that's a compatible option for third gens. Unless you have a reliable source for e85. It's rare near me, so most people go flex fuel that way they can use both e85 or normal octane.
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Old 01-03-2019, 12:25 AM
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Re: E85 on ls3

Flex fuel will be in the future for sure but for now I just want to be able to get it to run so I can break in my setup then Iíll be looking for a newer pcm to run flex fuel. Iím lucky to be in the middle of over 10 e85 stations within 30miles lol
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Old 01-03-2019, 08:07 AM
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Re: E85 on ls3

Originally Posted by SiCkRs View Post
I am running ls1 gas tank with braided lines to stock fuel filter. I know I will need a e85 compatible pump and bigger injectors for sure. Any help Iíd appreciate guys. Btw hereís some pics
You'll have to replace that rubber hose with either PTFE or stainless hard tube. I would go stainless hard tube from one of the companies that reproduce the factory hard line, I's only ~$100-120 and will outlast the car. I am not sure why people like using the rubber hose so much, it has to be replaced periodically. I have a 4th gen tank, with the factory plastic and hard lines from the 4th gen, 4th gen filter, 3rd gen hard line and a PTFE hose from the hard line to the fuel rail. Cost me less than all that hokey stuff to make the corvette filter work with rubber hose to the front and I'll never have to replace any of it, or at least not for a long time, not every 3-5 years. The alcohol is very hard on rubber parts
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Old 01-03-2019, 12:45 PM
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Re: E85 on ls3

Where can I find that reproduction line you have mentioned? Or do I have to get it custom made.
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Old 01-04-2019, 08:44 PM
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Re: E85 on ls3

I got mine from sstubes.com It wasn't listed on the website last time I looked, but i emailed them and he said is still available though.
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Old 01-04-2019, 10:04 PM
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Re: E85 on ls3

Without higher compression, or forced induction it's not really worth the effort. You won't make significantly more power and fuel economy will be reduced quite a bit.

With higher compression or forced induction its AMAZING stuff. You can't detonate on it and combustion pressure (temp) is much lower.

E85 really wants like 14:1 compression. Max power fuel/air ratio is around 7:1. LOTS of fuel, and tons of compression are what make it worthwhile. Or a turbo.

GD
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Old 01-06-2019, 04:21 AM
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Re: E85 on ls3

Clean that air filter lol
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Old 02-02-2019, 05:36 PM
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Re: E85 on ls3

Well decided to buy another lsa blower for my car so definitely going for e85 flexfuel now. Thinking of getting Racetronix 4th gen lines setup itís a 8- an feed and 6-an return system. What do you guys think?
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