[MJN]

Perry

You may want to call the head manufacturer and ask if they think that compression ratio is too high for their heads with your cam. Some heads are very tolerant of higher compression ratios and some are not. Different quench area designs and also the amount of swirl or tumble that is imparted to the incoming mixture all enter into it. If you have a cam with zero or minimal overlap then you may find that the compression ratio is a little too high to run on pump gas.