Posted by LJD on January 07, 2012 at 14:38:13 from (75.213.249.188):
In Reply to: Re: 4230 power loss posted by rrlund on January 07, 2012 at 13:26:45:
I don't think it's mechanically possible to over-advance timing at high RPMs. Not unless someone unbolted the pump and moved the entire housing . . . and then it would be advanced all the time. Not just when hot.
The timing advance works by a hydraulic piston moving the cam ring. It can go just X amount of distance and then metal hits metal. That is at full advance for high RPMs and it cannot go any further. It can malfunction and make the engine run too retarded at high speeds - but not too advanced. If it was too retarded it would skip and start breaking up. Not run smooth, labor and blow black smoke.
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