Frankfort MB's
Well-Known Member
Cheap and easy upgrade thoughyes it is a lean fuel/air ratio that is the main culprit of high head temperatures.
But when you have the right ratio if you increase the compression then that increases temperature
which is why I recommend not raising it too much.
going from 90 to 135psi is enough. most aftermarket heads bring it up to around 160 which is way too much.