O.K. I'm just about at that point where I have to decide where to set the CR
on my 1275 project.
Motor specs as follows: 20 thou over, valves 1.401 intake and 1.212 ex.
SPVP3 cam with 1.5:1 rockers. Dual HS2s on maniflow manifold.
APT says the cam is suitable for CRs between 9.0 and 10.5.
Is 10.0 too high on today's gas? Will I become a slave to octane booster if
I go that high? For performance and economy I would likt to set the CR as
high as possible, but don't want to have to find racing gas to make the darn
thing run. Suggestions?
Hal
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