Reply to "Questions regarding George's 275/285 Custom Street Cam Profile"

George PAdmin.

3 cams, all very similar, the lower-end of their cruise rpm ratings are about equal (2400 - 2600).

I like the one on the right. The one on the left "sounds" like the better choice if you read Crane's description (1400 - 5400 rpm range, daily driver, fuel efficiency) but the one on the right actually has 1 degree less overlap. Low overlap, centered at TDC, for good low rpm power. Early opening exhaust valve (opening at 80) allows the engine to rev at high rpm. The torque curve is being stretched at both ends. The overlap is not "too low" the engine should have a bit of a lopey idle.

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