Speedmaster Small block porting tips and results Part 1

Flow numbers

———-stock——-ported——-gain
.100——-34————-40————+6
.200——-95————104————+9
.300——-135———-143————+8
.400——-159———-175————+16
.500——-172———192————+20
.600——-179———202————+23
.700——-181———207————-+26
.800———————-210

I never flow these ports this high as they are usually stalled way before I get this high.
You have looked at a lot of ports. Can you figure why these are so good?