head port size help

[celal]

what is the exact size of intake and exhaust port on 964 heads?
intake ports 41.5or 41? what about exhaust?

[Bill Verburg]

Originally Posted by celal

what is the exact size of intake and exhaust port on 964 heads?
intake ports 41.5or 41? what about exhaust?

M64/01, 02 & 03; ports 41.5/38, valves 49/42.5

[celal]

Thanks Bill,
What about combustion chamber volume (cc)?

[Bill Verburg]

Originally Posted by celal

Thanks Bill,
What about combustion chamber volume (cc)?

you'd have to cc the combustion chamber for that info, I suspect that the folks that have done it will be keeping that info close to their chests, The only thing i know is that most 3.6s spec out way below nominal for cr