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E85 LT1 questions

 
Old 06-29-2019, 12:21 AM
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fred96ws6
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Default E85 LT1 questions

I have a couple questions on E85 in the LT1. I've read several threads on it and see some conflicting answers in regards to injectors and alcohol percentages. My 14 has LT's, AFE, Ported TB and been tuned for E85.

1. What is the max alcohol % the stock injectors an handle? I've read 50% but I've seen people say they are running in the mid 60% range.
2. That 30% alcohol is more then enough and anything over that you're really not gaining.

Thanks,
Fred
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Old 06-29-2019, 06:38 AM
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lancelot1
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I ran what was sold as full E85 with no issues on stock injectors. That was with the engine modified with Katechs cam and head package. Car was producing 515 whp. E85 contributed about 25 hp over 93 octane.
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Old 06-29-2019, 11:40 PM
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Matthewstorm
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I test my local E85 at about %73. One station was %85.
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Old 07-01-2019, 09:02 AM
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With those mods you can easily run 85% ethanol. Do you have flex fuel? if not you should.

Max detonation resistance comes with an ethanol percentage around 50%. Anything over that is not really helping to make more power, but will allow the cylinders to be slihtly cooler which is not a bad thing. Plus it is much easier to simply pump a full tank of e85 over mixing a partial tank with 93.
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Old 07-01-2019, 10:31 PM
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fred96ws6
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Originally Posted by subieworx View Post
With those mods you can easily run 85% ethanol. Do you have flex fuel? if not you should.

Max detonation resistance comes with an ethanol percentage around 50%. Anything over that is not really helping to make more power, but will allow the cylinders to be slihtly cooler which is not a bad thing. Plus it is much easier to simply pump a full tank of e85 over mixing a partial tank with 93.
subiework,
I do have the flex sensor. When car was tuned the sensor was reading alcohol at 45%. I mostly run the car between 30 & 40 percent alcohol and have no detonation and it runs strong. I did run 70% one time and the car would run fine during normal to a little aggressive driving but WOT it would start bog down at the upper RPM range when shifting like it wasn't getting enough fuel.

Last edited by fred96ws6; 07-01-2019 at 10:32 PM.
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Old 07-07-2019, 12:58 AM
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the 50% E info is for the LT4 engines with boost and stock fuel system. The NA LT1 can run 85% on stock injectors. If you were getting bogging or the car wasn't running right at wot on 70%+ E then its most likely a problem with the tuning.
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Old 07-07-2019, 08:06 AM
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Gary barnes 1098
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Trust what poppacapp is telling you,he knows his e85 stuff.
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Old Yesterday, 11:54 PM
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Currently on stock fueling with BTR stage 2 cam 38% Lobe and Alky Meth kit.
Making 731whp with A&A blower.

I'd like to not rely on meth so I think I'll go pure 93 pump with meth to help cool and make about 650whp.

What all will I need to go e85 so I can ditch meth all together.

lt4 injectors, lt4 hpfp? Or will I also need an auxiliary low side pump?
Is my in tank pump enough?

If I can figure out what I need for e85 I could max this blower out close to 800whp (My block is build)
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