That math always lines up when I do it , and I'm a curious type so I will flow @ 28 then convert to 50 and then flow it @ 50--Always lines up--UNLESS the head has a stall .
For example a BIG name cylinder head in the Ford camp is advertised to flow *** cfm @ .600-.700" @ 28", well I have flow tested a few sets and all of them stall @ .550" UNLESS I test them @ 10". They will flow great @ 10" all the way up the lift range and when you do the math to convert to 28" guess what? They flow what the claim is. Its a great way to market isn't it? Moral of the story is the math works unless the port goes turbulent @ a higher depression. J.Rob
