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What wears or stretches more on dbl roller timing chains? Top cog? Lower sprocket? I just got a more " economy " timing set and wondering if i should advance the cam a little to compensate for wear ?

Don`t know what these guys are joking about but a few builders I know advance it for that reason to compensate for chain stretch. At Pettis we`d boil the chains to impregnate the hot oil into em and lessen the stretching that takes place on a running engine.



It's true.

This is why this time around I have a geardrive.
When I took my smallblock apart the last time the chain was hanging so damn bad if I reversed the engine it would have skipped teeth.

No more of that crap...now I'll supposedly destroy my engine with "harmonics" instead.
We shall see!