91 octane with 10% ethanol vs. 91 octane pure gas

[WildHorse]

On a N/A going from 24 degrees to 27 is probably a solid 25-30whp difference.

Really? Wow. Thank you 94 E10 !!

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[AZ18yote]

Really? Wow. Thank you 94 E10 !!

If you like that, on an FI application every degree of timing is worth about 20 hp !

 

[WildHorse]

If you like that, on an FI application every degree of timing is worth about 20 hp !

That's crazy !! But, makes sense. Good thing I'm sticking to NA haha.

 

[bootlegger]

I discussed this with some technical people I know. Here are some other thoughts

2) Additionally, Ethanol has a lower flame temperature than Gasoline. So, Ethanol doesn't cool an engine more than gasoline, it just doesn't burn as hot as gasoline does resulting in a lower engine operating temperature.

This isn't entirely correct. It doesn't just burn slightly cooler, the solvency/ability to hold water provides a cooling effect from the ethanol before combustion. Vaporization is key.

 

[bootlegger]

I get 4 MPG better on pure 93 than I do with E10 93.

1/4 mile trap speeds are the same. I'd rather have pure gas and the better efficiency.

You must get over 30mpg normally, or that wouldn't make much sense.

 

[K4fxd]

I get 23 on real gas and 19 on e10.

 

[AZ18yote]

I get 23 on real gas and 19 on e10.

23 is extraordinarily good mpg unless just babying it or all hwy driving ?

 

[Exhausted]

I don't really see a difference with MGP but at the track I noticed almost two tenths on my ET. Now I know that could be the DA or track conditions but the main difference was E10 and then 100$ gasoline.

 

[K4fxd]

I baby it, this is from the dash data. Seems to be close.

 

[K4fxd]

My trap speeds are the same, Edgewater sports park. So the power is the same just uses more e10.