There are too many people that are getting mixed up in my answers. In going to try and stop doing that. Wish I knew how to quote just part of a post and then answer it. Copy and paste is too tedious for me.
Anyway, I agree not to get all caught up in advertised numbers, but they do matter. Once the valve is off the seat about .020-.025 you start getting some flow. If you up the pressure it happens earlier. We know that at overlap, the pull on the intake port can be as high as 120 inches on a decent prepped street head. So with long slow ramps you get into issues with reversion. That's why GM in the aforementioned 30-30 Duntove junker and some other junk GM cams that I can't recall the nomenclature on, had LSA's as wide as 116. It was to help with the bi seat to seat numbers. They were **** cams.
