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  1. #1
    Join Date
    Sep 2007
    Posts
    109

    Default Maximum compression on e85

    I keep hearing conflicting things on the maximum compression ratio that e85 is good for. I have an iron headed 406 that's 14.5:1 that i was hoping to run it on.

  2. #2
    Join Date
    Sep 2009
    Posts
    723

    Default

    My carb guy has engines on 16:1 with E85.
    14.5 is okay, just test and make sure your getting at least E75 if buying it at the pump.
    PM if you have more questions.

  3. #3
    Join Date
    Oct 2017
    Posts
    1,203

    Default

    Considering the power they make with it on boosted applications. I see no reason why their would be any limit with it on a n/a combo

  4. #4
    Join Date
    May 2007
    Location
    Nebraska
    Posts
    511

    Default

    E85 and higher is a huge help to any engine. I know in a few LS applications with changes to the intake and exhaust side of the engine, you can get 160+ HP gains.

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