SPEEDMASTER ALUMINUM HEADS

Meanwhile, on the original subject of Speedmaster heads (mine are for BB but I would expect similar from a SB head), I got a deal on a bare pair ($502 shipped), and sent them to Dwayne Porter for a little massaging (his Stage 1, clean up the valve job, blend the guides).

OOTB with Ede. valves
Lift——-in/ex
.100— 67.5/53.5
.200—137.2/101.2
.300—202.8/138.3
.400—241.2/160.3
.500—256.1/171.2
.550—262.5/174.4
.600—269.2/176.9
.650—269.2/178.1
.700—269.2/179.3

After:
Lift—— in/ex
.100—- 72.5/62.7
.200— 148.8/105.4
.300— 217.6/143.9
.400— 261.8/171.5
.500— 286.1/190.5
.550— 290.5/197.8
.600— 292.4/203.7
.650— 293.5/208.6
.700— 294.3/212.2