Luis998
Honda Enthusiast
That helps with picking the cam profile. You match the lift and duration to the point where flow is greatest.
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Here's another good link; Cylinder Head
Regarding flow, the tulip is the physical shape of the airflow coming into the engine around the intake valves. A proper flow will look an unbloomed tulip. The goal of valve work is to get a perfectly formed tulip from each intake valve. Can't for the life of me find a picture of it now, though.
This is something I've toyed with buying; Head & Intake Porting Secrets
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Here's a fun picture for you, just to illustrate how complex this all is.
Mmmmm, more to learn from. Sweet! Believe it or not, I have a binder with all sorts of information that is pertinent in helping me with my build, as well as other things that have caught my interest in the past. (an LSVTEC build is one of those things, though it seems a tad bit more than I could handle right now)