|
I won't mince words , a '75 , '76 or '77 CIS engine is one of the worst engines Porsche produced because of emission requirements . If you want the car to run half decently don't even think about using the original CIS pistons , and don't use the CIS cams if you are using carburetors , the carbs alone will not change anything . Leave as is or use different pistons and cams . Any cylinder head work will be a waste of time and money with the CIS pistons and cams .
|