Maptuner X E85 Tune


#1

I have read in multiple places that the E85 tune for the 900 ACE provides 120 hp ? How is that possible? Does anyone know. You would think using gas with less octane would not provide more HP that a standard tune for 91 gas. Curious what the technology is behind that tune.


#2

So equal volumes of fuel with different octane will have different energy potentials.

But you can just inject the extra 10% or so that makes up the difference for E85 and since it is less prone to detonation you can run more aggressive timing.


#3

E85 is 85% gasoline and 15% ethanol…not 85 octane. The ethanol(corn alcohol) has a higher resistance to burn (octane) and also cools the fuel mixture, thus allowing more horsepower to be produced.


#4

Biker is right…what I wrote is pretty confusing as it is apples and oranges.

To further correct what I said, E85 has less potential energy, which is the reason for injecting more rather than due to octane.