Stillen SC A2W Plenum Temps

Chuck33079

Isn't that 98 RON? That comes out to about 94 the way we measure it here in the US. Still great, but not quite as impressive as it seems at first.

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blobbish

Your right it is around the 93–94 (AKI) and the E85 you guys have is 94-96 (AKI), although looking at the tables its comparative with your premium/super stuff.

We did have a race 102 (98-98 AKI) but that was way to expensive. Current fuel prices here work out to be $6.50 per gallon

TopgunZ

Quick read from a website:

Straight ethanol has a race-gas-style octane rating of 115. Mixed with 15 percent 87-octane pump gas, E85 lowers this to between 103 and 105 and generally sells for less than 87-octane gasoline. You read that right. We're talking the equivalent of 105-octane race gas for the price of moose-piss pump gas.

While there is a 27 percent reduction in heat, ethanol's strong octane rating allows the use of a higher static compression ratio to take advantage of that resistance to detonation. This means if you were to run E85 in an 11:1 or 12:1 compression engine, E85's higher octane would prevent detonation, which would allow you to run this higher compression ratio and take more advantage of the reduced Btu heat output by squeezing the existing air and fuel a little harder to make more power.

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