In the int bowl blend that lip out on the short turn, the common wall side and the back of the bowl , but only half way around to the Exh side of the bowl on the rear wall ,and do not polish out the blending work , leave it with the ruff texture of the cutter as long as it does not look like the suface of the Moon!
Exh valve back cutting wise, any where from a 20 to a 35 degree angle will produce some level of a low lift flow gain .
You have a nice 3 angle job in the chamber now which will pick things up so my main concern with applying a back cut would be to keep the main seat width to atleast .070" wide.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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