Gonna be running IMCA's 500 cfm engine this year, so unfortunately my double humps have to go, and with it my 10.75:1 compression...sad day.
Ive heard that 441 heads aren't bad, about the best option, but I'm open to any ideas!
How far down could one mill a 76cc combustion chamber head, to get compression back up?
any other thoughts?
thanks.