Quote:
Originally Posted by jwshira
HPD, I understand about cams being ground as you describe, but all I did was pull a balancer off and put a new one on. I would have thought that if the timing mark lined up with zero on the old balancer, it would be the same on the new one. I'm not sure how the cam grind would affect that, but if I'm missing something, please give me a bit more explanation.
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Here is the important piece of the puzzle. The new balancer is clearly wrong.
The original combo showed all the possibilities of any error did not exist.
And we all know that this not related to cam timing.
But just for your info, your first pass at kissing the piston stop is at 4 BTDC on the compression stroke.
Now when turn the engine backwards to strike the stop again, you are chasing the inlet valve opening point, and around 10 ATDC is the closest point for piston to valve clearance, coincidence?
I would find another stop that kisses earlier in the stroke, and repeat your tests. For example, if you get 46 BTDC ad 54 ATDC instead of 50 in both directions, then your balancer is still incorrect.