Head Porting Recomendation?

Chad Speier said
Thanks Guys.

I'm not a big flow number guy, more velocity..

Here is some data on the Performer RPM

2.140/1.810
45º seats
NO PIPE

.200 140/115
.300 214/146
.400 264/174
.500 292/191
.600 307/205
.700 319/216
.800 321/226

Just out of curiosity Chad, are air velocity and flow not directly related? Wondering why one would focus more on the air velocity. I'm just trying to learn.