Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Cam lobe seperation
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Old 09-19-2008, 09:25 AM
454C10 454C10 is offline
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I believe that means it is an asymmetric cam. That means the lift ramps and lowering ramps are not the same. So, the max lift is not centered on the lobe profile.

If you do the math on the @0.050" then the LSA should be 112 degrees if the max lift is centered on each. On asymmetric cams, typically the exhaust closing ramp and the intake lift ramp is slightly slower, so it spreads out the peak to peak lift point (exhaust peak and intake peak).

So, even through the LSA is 112, centered between the closing and opening points, it will be 116 (112+4) at the peaks which is the typical way to measure LSA.

so install the cam at 112 degrees at the intake peak.
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