Originally Posted by jferg92
Can someone explain what the head cc is and how it relates to piston choice and compression ratio. Im guessing its the combustion chamber volume which means the more highly modified heads have less? What is the stock size on an unmodified head?
Edit: looks like the stock 4.6 head is 49.77cc so I wonder if the 5.4 is the same
Yep, it's the size of the combustion chamber in the head. Stock is 42cc as everyone else mentioned. Trick flow has a 38cc head available to tighten up the compression a bit. I'll be doing the 38cc heads and some dished pistons for a 9.2 or 9.3 CR.
Most modified heads a 42cc, it's kinda hard to add more material later on