No good news here...lol
Well, there is and there isn't... not bad, but lacking a hair. As cast they are garbage.
As cast 1.94 11/32 valve @28 w/4" bore adapter.
Lift-cfm
.100- 47
.200- 98
.300- 147
.400- 181
.500-196
.600- 226
Nutshell, They flow like a 318 head ootb up to .400 lift.
After the work i did in the last post +pinch and straight wall.
Lift-cfm
.100-63 +16
.200-119 +21
.300-178 +31
.400-212 +29
.500-246 +56
.600-254/257 bouncy/turbulent +26-28
Conclusion Now i have fiddle fk them more than i wanted. The chamber is still smothering...its a 1.94... though it's not a 2.02, it should still do about 10 cfm better .200-.400 lift. Imo
What will I do next you might be asking yourself....well... a 75 degree lower angle , lower the ssr height from the window side and work the chamber nearest the cyl wall for starters. I don't think the raised fin between the int/exh on the closed side is helping any either... The chamber can be opened more at the far side of the bowl right off the seat/15*.
This head ootb would just kill the perfomance bolted it on as is. Looks are decieving , and even a decent looking ssr can get road blocked by a intrusive chamber. Nothing new i guess. They come with buried valve seats. If they could come up with or offer a cnc it would be the only way they'd be bought!
