a lump ported head with MILD (port work)cast iron head.And Flow tested on a Super Flow SF-1020 flow bench.
Intake 194 --- Exhaust 1.6 @28"
.100 63.5 --- .100 56.5
.200 128.6 --- .200 105.3
.300 177.9 --- .300 130.8
.400 215.2 --- .400 149.6
.500 234.0 --- .500 163.7
.600 244.6 --- .600 173.9
.700 250.5 --- .700 180.5
.800 251.9 --- .800 184.5
These numbers are of a head that my lumps were installed.And had only mild port work (valve area)& Had Only port matched the head to a Mrgasket int & exh gasket. The port was Not touched other wise.(meaning The roof was not rasied Or was the intake port widened.
I hope this helps.
Ps you can not compair a SB head to our L6 head
when it comes to flow numbers.
God doesn't like ugly.
