alcohol helps "quench" the motors hott spots. if you have high velocity ports, like your intake port, you could possibly get frost or a extreemly cold reed and maybe colder front transfers(intake side)
and if your motor has a smaller exaust port your pipes will possibly be cool enough to touch at the end of a ride or a drag race.
and it does more of a rolling motion that a cumbusting motion. thus resulting is better power increase 15% atleast. more compressions isint ALWAYS better for alki. there is a deminishing point where alki wont like the PSI or tight squish clearences.
Gasoline likes high compression to, 91Octane cold run 18:1 compression ratios and not detonate if the motor is built properly. Thermodynamics, and Fluid mechanics are wonderful things to know when come to building pump gas engines.