Exhaust Gas Temperature

[Charles Rainey]

Originally Posted by bill dedman

If "too much octane" slows burn time, then what about E 85, which supposedly has a LOT of octane (because it's alcohol. mainly?)

Anybody have any comparative figures for E 85, compared to 110 octane gas? (burn rate)

Bill
You are not comparing apples to apples. You are comparing apples to oranges. If you use that train of thought, then look at Methanol or even better lets look at Nitro or even look at the pure Methane (My Wife)gas that some people put out HeHaw. All these fuels have totally different burn characteristics. Yes I have played with E85 and I only use it where they say I have to use pump gas and even then if I can get by with it. You really better check each batch of E85 you purchase as it is all over the place and you better not run it on the razor edge and then purchase more fuel and not check it. Weve seen E85 or E80. I guess, what I am saying try it on the dyno first so you can monitor it. I had a customer jet for E85 and he took the top ring right out of the engine and then he called me. wished he had called me B4. There is Et in fuel, but do it smartly. Some engines burn towards the exhaust valve, some dont. How much quench area you have will make a difference. I personally want a small quench are (read the piston number on the head).Oh also on E85, you better watch the carb for deposits and other changes you may not like.
charles