Fuel these days...

[pk2]

Originally Posted by blue2000s

E100 is about 113 octane. If your goal is to hit 93 octane, using 22/78 race/pump gas your cost is at about 3.70/gal if you assume pump 91 is 3.00/gal.

9/91 toulene/pump is 4.50/gal

9/91 E100/pump is about 3.63/gal

This is just to get you to a safe octane rating. As we noted before, race gas will have more energy content than E100, so you'll make more power (and wear) on the race gas.

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Thanks as always BLUE200OS,

Nice of you doing the arithmetic, I flunked that class. Pretty much my how I've been running it the majority of the time (8:2 piump). I usually wind up using toluene in pinch. It's a lot easier to find, in most hardware stores, than race fuel.

Ive got a custom made h2o/methanol injection sittimg on a shelf. Sure to relieve any angst with an effective octane well over 100 oct. on any grade pf fuel(from what I understand). Dont quite understand it but, Ive heard of people claiming the equivalent.118 on a 50/50 meth h20 mix, a little less with straight h20.

Regards. PK

[edevlin]

Does it make any sense to put in a gallon or two of race fuel with with every tank of high test? I have also noted that my mileage goes down (and maybe performance, hard to tell) with ethanol in the mix. BTW, I did a couple of dyno runs with my 2.7L and picked up a few HP running straight race fuel, that was an expensive, but fun experiement....

Ed

[pk2]

Originally Posted by edevlin

Does it make any sense to put in a gallon or two of race fuel with with every tank of high test? I have also noted that my mileage goes down (and maybe performance, hard to tell) with ethanol in the mix. BTW, I did a couple of dyno runs with my 2.7L and picked up a few HP running straight race fuel, that was an expensive, but fun experiement....

Ed

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Well, you still have the same amount of ethanol which was what this thread was about, and for reasons I forget, till I hijacked. But good question, according to blue-s the ethanol just helps at detonation, race fuel should pack the rest of the energy on down the the hole, which ethanol won't...

On the other hand, why bother, your car shouldn't be noticeably faster with anything over 93 high test. 91oct and 2 gallons of 1000 should give every thin the alcohol dose plus the added punch...be like real 83 oct.

pk
PK