They are door stops now in my opinion,travis wrote: ↑Wed Jun 16, 2021 6:42 pm Throat size…something I completely overlooked
Throats are 1.80”-1.84”, which with the current 1.94” valves gives 92.7-94.8%. A 2.00” valve after equalizing all the throats at 1.84” gives 92%…a 2.02 gives 91%. A 2” valve is going to be super tight though, putting the edge of the valve right against the chamber wall, and starts to get into the 18mm spark plug trough.
My wife likes to quote Frozen in these situations. Let it go, let it go…
Larger throat 90% plus as an example can be used with steeper angles and is dependent upon application,
I don't think those heads qualify