Re: Gear drive vs Timing Chain

by The Dude Wed Mar 17, 2010 8:46 pm

It was what they used from the factory. I just helped my dad tear apart a 327 a couple of months ago & the Nylon gear was still in good shape even though the chain showed stretching.

by BlackChevelleSS Wed Mar 17, 2010 11:45 pm

Ive got a collection of them, My dads 302 in his 69 camaro has nylon gear originally in it and it blew up.
One weird thing I noticed the other day, We ordered a Cloyes True Roller with thrust bearing and the cam gear has the GM logo and GM part number on it, the crank gear was billet steel with 3 key ways

by dragons_lair59 Thu Mar 18, 2010 10:16 am

i think they have a gm part number because they use them in soe gmpp engines

by JB2wheeler Thu Mar 18, 2010 11:39 am

My nylon gear in my 351W dumped at 99,000 miles. I caught it just in time to stop any other damage, I was lucky. JB

by robert_harsh101 Wed Oct 03, 2012 7:31 pm

i know im a couple years late but back to the orig. question. the gear drive can cause harmonics and catastrophic faliure to your cam if it is not installed properly. i have seen broken cams from this. yes it is more accurate on cam timing which in turn would give you more horsepower over a chain of any type. common sence if there is no slack there is no lag, no lag = quicker responce. quicker responce= more power. all chains have some slack. on a gear drive there is slack also but it is 0.020 max if set up corectly. a chain is up to .25 max.

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