The thing that’s almost never discussed when talking about the 30* seat is, it allows for easier port reversion during the overlap period, especially when there is any restriction in the exhaust system(mufflers), and can make it so the motor has to turn a few hundred more rpm before really overcoming the reversion and getting up on the cam.
It’s more of a “problem” as the cam starts getting “bigger”.
Really it comes down to this......
Does the 30* increase low lift flow?
All else being equal....... basically..... yes.
Is that something you want?
Maybe......maybe not(usually not......even if you don’t know it).
