Thread: The E85 Mystery
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Old 06-19-2014, 05:38 PM   #23 (permalink)
Nixlimited
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Quote:
Originally Posted by Jordo! View Post
Also, if E85 has a lower stoichiometric ratio than regular petrol I believe that translates into more potential energy (i.e., combustion pressure) to get out of it, so that could be contributing too.
Ethanol has significantly less potential energy than gasoline. That's why it takes significantly more of it (think huge injectors) to make lots of power. But it's excellent for knock resistance.

Per Wiki: Gasoline has 114K BTU/gal to Ethanol's 76K/gal.
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