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Old 10-23-2020, 02:24 PM   #7
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Join Date: Jan 2011
Location: Central Ohio
Posts: 2,893
Default Re: Finally some Cam Degree Numbers - Now what?

You should do it with zero lash - and use the .050 numbers (they tend to be more accurate). We have no idea as to how the opening ramps influence the timing - only way to figure it out is with the heads off and checking the timing of both valves - and I'd do both at .020 as well as .050 (to compare). Given your lash of .014, you can look at the .020 timing to get a rough idea as to how close you are.

Just from what you've posted, seems the cam does not truly have the duration that it was advertised with. Comparing .020 to .014 lift, the valve should open SOONER than the timing tag and close LATER - it closes quite early.
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