[numus]

There is no higher pressure requirement or temperature for ignition though. You have it backwards. It burns slower, therefore you need advanced timing and are allowed to run higher compression to use it fully. It'll work in Kats and other cars, you're just ****ing away money.

Ignition point/temperature is the same for gasoline regardless of octane rating. It is the burn speed and propagation of the flame wall that changes with octane. Hence the need to ignite it sooner than lower octane gasoline. It is also more resistant to detonation than lower octane, thus allowing the use of higher compression. It doesn't require it.

You have the concepts down, but the implementation is slightly incorrect.

In regards to alcohol, that is BS. There is a reason that drag cars burn alcohol and not gasoline. Also, different sources of ethanol contain different amounts of energy. The corn ethanol we use is around 70% the energy of gasoline. The sugar cane ethanol Brazil uses is about 110-115% the energy of gasoline. Loudnlow explained it well also.

The statement about the higher pressure requirements are directed towards lower incidence of premature ignition