whats the octane rating of e85?

 

105

 

105 n acts as 110 cause its cooling properties like methenol right?

 

Not sure about that but I have read where people have made as much and sometimes more power on e85 than c16 race gas which I believe is 110. Which I would assume as you have it's because of the cooling properties inherent in the ethanol. Someone else might have a more technical response than I have to offer but I am under the same understanding as you.

 

Si

 

The research octane of E85 is around 118 due to the ethanol content, and the motor octane is 105.

An interesting thing pointed out by an article I read is, that E85 as we know is very great in dealing with knock, yet is very susceptible to preignition, which is why the motor octane rating is as "low" as it is.

 

E85 has the octane rating of about 96... 105 is false...

 

96? you are kidding right?

This is a very common question and I have done a few writeups around here. The actual octane rating and effective octane rating is SIGNIFICANTLY higher than it seems is normally attributed.

Pump E85 if mixed with 87 (it is around here) can be rated 2 ways, MON or R+M/2. I have the links all sorted from the tech section on our website, but the name of the thread is "what is the octane rating of winter E70" in the alternative fuel section. E85 is actually closer to 112 or so.

 

Decided to make it easier for everyone-

https://www.evolutionm.net/forums/al...ter-blend.html

post 8

 

I guess that everyone under the sun is incorrect then, eh?

http://members.tccoa.com/392bird/e85.htm
Benefits:
"It has a motor octane rating of 104-108, it is also quite cold to the touch. It drops air intake temps dramatically, which is GREAT with boost"


http://www.turbobuick.com/forums/e85...ctane-e85.html

"What is the octane rating of E85 compared to gasoline?

E85 has an octane rating ranging from 100-105, making it a high performance fuel. In comparison, regular unleaded gasoline has an octane rating of 87."
Source - http://www.iowarfa.org/PDF/E85_value...ct%20Sheet.pdf

"E85’s octane rating is approximately 105."
http://chooseethanol.com/pages/quick-facts/

http://www.modularfords.com/forums/s...E85-109-octane
"SUMMER
E100 at 85% (113 octane pure ethanol)
Regular at 15% (87 octane)
Final Summer Blend: 109.1 octane"

 

Thanks for the clarification JB. I was just going off what it says on the pump here in Cali but I know it's greater than 96!

 

actually ams said pretty much the same thing that english racing said so bud if you know more then both those shops then u should have your own shop..

 

Dont really know and dont really care.. What i do know is i have still NOT found a limit to the pump E85 fuel.. 225/hp cyl and still going without an issue.. so if its 80 octane or 120 I dont care.. I know 1 thing.. I havent found any gas thats better..

Mike

 

Hell yah.. im excited to see what Emery gets my car to pull with the e85 with my hta86

 

I've run e85 on a track car, nothing too crazy, 420 whp but noticed my catch can is filling up with a clear fluid that looks like water pretty fast

Its not water. Im having hard time finding eny answers

Any thought on that?

Greg