E85 Options

[badbu68]

I know some of you were interested in this considering the detonation resistance of 105 octane. You should be awaire though that the like gasoline, different winter blends cause different properties, apparently w/ e85 it's a 70% ethanol 30% gasoline blend. Anyway, check this out for tuning properties, I know it's a subie site but just try and overlook that;

http://www.cobbtuning.com/tech/instruction...ubarusv1.08.xls

[SCCA Stang]

If you can truely get more power out of it without much trouble that's a good thing.

And I'm not bashing anyone, but 300 miles on $30 bucks and 311 miles on $30 bucks in reality is a wash for me. I think the example is good and concise, but may even be a bit optimistic on the 10%, so the savings could be less.

More power is more power though.

I am not sure if you really are getting that much more from it overall if you look at the British Thermal Units (BTU) produced from it.

CLICK HERE is a site I found that talks about it.

and we just talked about this in school too and our books show these values for different fuels

2D diesel 141,800 BTU/gal
1D diesel 137,000 BTU/gal
Gasoline 110,000 BTU/gal
Butane 103,000 BTU/gal
Propane 92,500 BTU/gal
Ethanol 80,000 BTU/gal
CNG/LPG 75,000 BTU/gal
Methanol 55,000 BTU/gal

and the definition of a BTU is how much heat energy the fuel will produce when burned

so with that in mind I am thinking that Gasoline producing more BTU's accually produces more power per unit.

the only way that we are getting more power from Ethanol is from the lower volitility (a fuels ability to vaporize) which happens to reduce the likelyhood of preignition and detonation, thus we are able to run more compression, more boost and more advanced timing.

if we can simply control detonation and preignition while running gasoline we can do more with gasoline than ethanol