higher ethanol was my thought as well which would be less power.
I agree higher octane doesn't make more power,it is just more stabile?I hadn't adjusted my a/f for some time...maybe a bit of dirt in the carb or whatever?Would a detonation free engine be a more complete burn and give a lean reading?
..Time for one of the experts to weigh in?

Last edited by can.al; 08/18/17 04:57 PM.