Rich:
I essentially knew NOTHING about this topic until 6 months ago. I still know/understand very little. Nevertheless, I had already read your article on Fuel. I will review the terminology page.
I guess i should be more descriptive. I know the high octane stuff will burn, but will it burn completely?
This all stems from a conversation with my father-in-law (racing carts and/or modifeds for 40 years).
He disagrees with you on a couple points. He maintains that an engine of less that 10:1 compression WILL NOT burn anything over 100 octane efficiently/completely. Essentially that using 110 octane in a 9:1 motor has the same effect as taking 10,000 mg of vitamin C - it won't hurt you but you'll just "piss it out" in the form of splooge. He also cites repeated cases of cart and modified drivers who increased their lap times simply by changing from 108+ race fuel to either pump or AVGAS.
He is no chemist by any means, but he does have 40 years of day to day experience and testing, building motors, etc. . .
I notice that the info on Eric's site has some/all his built motors specs running under 10:1 compression.
I tend to think you and Eric are right on point, however, my father-in-law knows more about motors and transmissions than anyone I personally know . . . perhaps he's just been misled.
At any rate, until I have Eric put in the 144, any recommendation for race fuel for a 2002 RM 125, Bill's Pipe and Silencer? I may be interested in switching from the AVGAS.
Thanks for the input and any other thoughts you might have.
Rob