Slightly strange head flow question.
Pipemax shows you just how you can add more cfm/port but not make anymore power...because the engine can't access it. You have to build the engine so that it will access the airflow provided by the heads ports. If you don't do this, it's just like not degreeing the cam and then blaming the cam/company for a poor camshaft.
It can be relatively easy to build a performance engine, but engines are complicated even if guys want to dumb them down to make themselves feel better about it.
I want to bring this thread up again! its a interesting question!
-Where is that edge where the engine not answering to more cfm?
usually for me(read backyard tuner) I used to stick to known combos, or hack together something and test:cheers:, but now,
I have this program called PIPEMAX, it cost a few bucks but is worth every cent. just type in some basic numbers about the engine and this program calculate cfm needs to make the power the camshaft is capable of!
If you look at the pic, you see the one row (3. from left) that is piston CFM. This is the cfm value the piston is capable to "suck" ... so I guess there is no need to go beyond this number. (sure you have to use correct area and length on intake runner! this is the hard part:D make alot of cfm out of a small and not optimised port)
Pipemax shows you just how you can add more cfm/port but not make anymore power...because the engine can't access it. You have to build the engine so that it will access the airflow provided by the heads ports. If you don't do this, it's just like not degreeing the cam and then blaming the cam/company for a poor camshaft.
It can be relatively easy to build a performance engine, but engines are complicated even if guys want to dumb them down to make themselves feel better about it.