I'm confused by the charts on pages 9 and 10 of Kastner's book.
The charts on pages 9 and 10 both show HP curves using the standard
head, other than 10.0:1 CR, and using the S2 cam. It's curve "A" on page
9 and curve "C" on page 10. Curve "A" page 9 peaks at about 148 HP while
curve "C" on page 10 peaks at only 139 HP. There is also a note for
lower HP curve "C" on page 10 that in addition to the 10.0:1 CR,
velocity stacks and a racing valve grid were used. It seems strange that
the velocity stacks and the racing valve grind lower the HP? Am I
missing something?
Is a racing valve grind a 3 angle valve grind?
It's also interesting that the 10.0:1 CR only raises the HP to about 113
HP from the stock of 103 HP, while the S2 cam plus the 10.0:1 CR raises
the HP to either 148 or 139 depending on which chart you want to
believe. Seems that the cam is by far the most important performance
addition one can make.
FWIW, TRF sells Kastners book for $5.00.
Don Malling
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