318 head porting for the average joe
Worked and shortened the guide, straight/common wall, bowl, opened pinch and removed .030 from the roof half way in and right over the turn. What you call very ported....yet I did not gasket match the port window at all. Hand cleanup with 60 grit right in the bowl under the seat. Hope it helps somebody who wants to modify these heads low buck.
Intake Cfm @28 4" bore 1.78 valve
.100-62.9
.200-120
.300-172
.400-195
.500-201
.600-207
..beyond turbulence 193cfm
These rival stock 360 flow #s...but who cares.
Worked and shortened the guide, straight/common wall, bowl, opened pinch and removed .030 from the roof half way in and right over the turn. What you call very ported....yet I did not gasket match the port window at all. Hand cleanup with 60 grit right in the bowl under the seat. Hope it helps somebody who wants to modify these heads low buck.
Intake Cfm @28 4" bore 1.78 valve
.100-62.9
.200-120
.300-172
.400-195
.500-201
.600-207
..beyond turbulence 193cfm
These rival stock 360 flow #s...but who cares.
