Thread: Dual roller timing sets-Not for SBC hydro rollers??.

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Originally Posted by 1gary

Seems to me I read somewhere that you shouldn't use a dual roller timing chain on a SBC hydro roller cam.But for the life of me I don't remember where or why. Alittle help with that I what is am asking.

Also-I seem to remember reading the stock GM timing sets where machined with advance for smog laws. Sure would appreciate comments about that as well.

Thanks

Gary,
Is this for the 383 SBC that you're planning to build for the Astro Van, which I think you've said will be used primarily for highway with towing capability for your vendor trailer(s); or is this another engine or a general question? I can't help with the dual roller chain question, but I cannot see from a mechanical design standpoint how it could make a difference (other than clearance, as pointed out) so I hope any answer saying it's not to be done includes the "why".

On the stock timing set, wouldn't any "built in" advance be dealt with when you degree the cam to set it where you need it to be for your specific situation? You'll discover any factory "offset" when you run the degree wheel, won't you? Maybe I don't understand the problem?