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Old 03-04-2013, 10:01 PM
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What was at 6deg advance? Did you degree in the cam with a degree wheel and dial indicator on the lifter or....?
6deg advance based on what/ ? the .050" lifter rise open close events? or...?

What is/was the .050" (@ the lifter) intake closing point ABDC?

Do not go by the point of max lift of the cam lobes or the point of split overlap as this cam is a non symetrical cam. The intake and exhaust sides of the lobes are different and the in and ex lobe is not the same lobe.
You cannot determine the advance/retard phasing of a non symetrical cam by laying a ruler across the lifters @ TDC
or comparing the points of max lobe lift.

You need to degree the cam to determine its installed position based on the .050" (lifter rise) open close event timings.

You are primarily concerned with the measured .050" (lifter rise) intake closing point ABDC.
It should check @ 47deg ABDC @.050" and you want to move that to 38deg ABDC.

Last edited by F-BIRD'88; 03-04-2013 at 10:13 PM.
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