[madokie]

well since this thread is almost over(maybe) i will add a few things not said ,,it was smokey yunick that once said( in his power secrets book IIRC) they once put a plexiglass plate and a light inside on a SBC revved it up to 5k and watched the timing chain , the slack side was jumping around like a snake on fire..he also said the gear drive w dual idlers was no good..as to the roller timing chains , their are 2 ways to make the part that really rolls , the chepos take a flat piece of steel put it into a forming machine to make it round,,obviously these chains are junk,,the good chains take bar stock, drill a hole in center and ream to size, only buy these style chains, check out your roller chain an look for a seam on the roller part ,if found do NOT install !!!

[chuckies76ta]

Originally Posted by mgarblik

9-3112 Cloyes true roller set available at Jegs and Summit Racing among others. Approx. $125.00. High quality, rugged and reliable. We ran these sets on the Grocery Getter race car for for 16 years. Never a failure. Over 1000 lbs. open spring pressure, 8500 RPM's, just under one inch valve lift, Hundreds and hundreds of runs. We now use the billet sprocket set with the 9 keyways for more adjustment. Even more spring load, higher RPM's, 44 amp magneto, belt driven 43 GPM oil pump, nitro fuel pump and a 14-71 roots blower all pulling on that timing chain. Never a failure. Even when we had a blower explosion, that bent the crankshaft .030", left the blower case in 3 pieces. Even sheared the camshaft key off. Timing set and chain were fine and tight. I just don't know what else you can do to destroy one. I don't think a Chinese set would have fared as well.

So this one? Thanks.


https://www.cloyes.com/part-finder/?...=applicationhp

https://www.cloyes.com/part-finder-s...20428%2C%20455

[HWYSTR455]

Yes, the ones that say 'TRUE' in the name have the best chain.


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[chuckies76ta]

Thank you

Charles

[P@blo]

https://forums.maxperformanceinc.com...16#post5735816