What would be the highest compression ratio that i could use with ethanol? ethanol i read has an octane rating of around 105? and if i was to use a water/methanol inkection on top of that how much would be do-able? 11-13?
Thanks.

 

you can do 11 or 11.5 with 92 octane fuel and aluminum heads
i do on my small block
im assumin you have older technology ie, sbc bbc sbf bbf etc
not an lsx engine

 

yeah, its an 88 305...i am looking at some pistons that would get me to 12. something with 54cc chambers, and i am pretty sure i could not do that with 92 octane... but with (technically) 102 octane, would this be possible?

 

Why do you want to run compression that high?

 

i am not sure if it was 12 something or 11 something...but i want to make more power and since i am going to be running on ethanol i figured i could take it up higher since ethanol has a octane rating equivalent to 102-105, or so i read...