Ideal % of E85 for Power?

[CraigG.]

Hey Everybody,
What is the best % of E85 for horsepower?
Thanks, Craig

[user-23911]

All of it.

[Baprace]

Hey Everybody,
What is the best % of E85 for horsepower?
Thanks, Craig

I'm with Joe 90 , 100%

[modok]

more than all of it.

[digger]

more than all of it.

117.65%?

[cjperformance]

Hey Everybody,
What is the best % of E85 for horsepower?
Thanks, Craig

%of E85?

[CraigG.]

Hey Everybody,
What is the ideal % of Ethanol for pump E85 to make the highest power?
Thanks, Craig

[jmarkaudio]

Generally between 75 and 90% from what I've seen. It need a small amount of gas to improve early vaporization, get the fire started.

[pcnsd]

Hey Everybody,
What is the ideal % of Ethanol for pump E85 to make the highest power?
Thanks, Craig

Your question is not clear and a clear question will get you a clear answer.
Are you carbed or EFI?
Are you asking what % of ethanol mixed with gas (75%-90%) works best? I think it may depend on ambient temperature at time of operation. My application starts and runs like crap below 65F until the motor is hot on pump E85.
Are you asking what mixture ratio in air for E85 specifically? Unlike gasoline fuels, alcohols have a wide tuning tolerance. It is generally safer to be on the rich side and it carries little power penalty within reason.

[Circlotron]

Generally between 75 and 90% from what I've seen. It need a small amount of gas to improve early vaporization, get the fire started.

In that case it might be an interesting experiment to bleed a small percentage of hydrogen into the inlet airstream. Spark lights hydrogen very easily, then the hydrogen flame *rapidly* progresses through the chamber to get that E85 up and going!

[cjperformance]

Generally between 75 and 90% from what I've seen. It need a small amount of gas to improve early vaporization, get the fire started.

In that case it might be an interesting experiment to bleed a small percentage of hydrogen into the inlet airstream. Spark lights hydrogen very easily, then the hydrogen flame *rapidly* progresses through the chamber to get that E85 up and going!

Send us a vid of the fireworks when you get a cold backfire thru the carb !!

[Circlotron]

I did say it would be interesting.

[cjperformance]

I did say it would be interesting.

Haha yes true! Other than that it would work fine

[Mike Croley]

There doesn't seem to be a reliable figure for the ideal blend. For pump e-85 it stands to reason that the higher the ethanol percentage, the less 87 octane you'll be running through the engine. With race E-85, like the Renegade Pro E-85, customer feedback says that 85% works just fine. We also sell a fair amount of Renegade Pro E-98, some use it to blend down, others run it as is.

[woody b]

No help for the original question, but an engineer told me "they" put 15% gas in E-85 for 2 reasons. Cold starts, and to keep people from drinking it. Perhaps e-98 has 2% something that's poison, or otherwise non drinkable.