Victor340 and RPM manifold testing

Icetech said
I get that, Eric explains it in pretty much every video he does :) i was more curious that if someone (Me) is planning a 408 that won't be going over say 6500 (cause i'm a wussy that worries too much) would having 330 over 300 make much difference or does that extra cfm mostly matter to the guys that are running up well over 7k?

300-310 is pretty easy. I wouldn’t even port a set for a customer if he wanted over say 320. In hand porting 8 ports to that cfm level takes more time than you can imagine. Short turn sizing and shape has to be spot on. That set I’m doing for my car will probably get every single intake port flowed on my bench multiple times.