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I am looking for a quite double roller timing set for my 71 350/270 hp. Should I go with Sealed Power ($35.52), Edelbrock ($60.00), Cloyes Heavy Duty ($18.99), Speedpro ($45.00), Zoom ($21.28), Clevip ($18.99), Dynagear ($13.99), Algin Pro Stock ($30.00)
Considering the hassel to replace it, and the damage to the rest of the engine that one can cause if it fails, I'd look for the best you can get. From the broad range of pricing you posted, I suspect that only one or two of them are "true" rollers. The difference is in whether or not the rollers are seamed or not. A "true" roller has no joint (as in a section of tubing) in the roller whereas a standard roller is a piece of metal formed into a round shape and the ends butt. I run a Cloyes "true roller" which sells for $60 or so.
Another consideration might be if it's adjustable or not. Some allow advance/retard positions, some only permit straight up. 99% of the time straight up is used so that may not be a factor in your case.
I'm running the Cloyes double roller. The chains come pre-stretched so you won't have wear in problems. My engine builder swears by them and he does not cut corners. A lot of people prefer running timing gears instead, would probably make sense if you are trying to pull some major horsepower.
Read an article recently that didn't give the gear drives a very favorable look. The vibration from the gears and crank are supposedly transmitted to the cam and can cause it to be more inaccurate than the chains.
Don't know if it's true but the article was credible.
Dep
Read an article recently that didn't give the gear drives a very favorable look. The vibration from the gears and crank are supposedly transmitted to the cam and can cause it to be more inaccurate than the chains.
Don't know if it's true but the article was credible.
read smokey yunicks power building secrets, he recomends a gear drive, but!!!!!! the kind that has a reverse rotation and that requires a special cam
Only negatives I've ever heard were noise. Some guys even like the sound. Kinda like a "turbine" sound. :)
Need to find out who exactly wrote that negative article. If it's in a car magazine check to see who the advertisers are ;)
I just fitted a PJ gear drive and love it. My car isn't a daily driver so the noise doesn't bother me and it sure gets people's attention too. Obviously I haven't had it in long enough to see if there're any adverse effects, but it's not a new motor either so it doesn't matter.
Paul Jackson gear drives have been around a LONG time. I'd be very surprised/suspicious if negatives "suddenly" started showing up. I like the noise :D
Just remember PRICE alone does not make a chain set better than a less expensive one.
Gear Drives are popular but hardly needed for a street machine.
Changing the damper is a cheap "to-do" especially if yours is original as they tend to slip.
Actually, roller timing chains are probably "overkill" for a street machine. All you really need to do is make sure you don't have any plastic gears. Timing variation isn't going to matter much when you're driving from home to Dunkin Donuts and back :)
I have used the Crane billet steel on three motor rebuilds. When i had to replace the roller cam this April. I was amazed that the chain had virtually no stretch in 20,000 miles of monster roller cam springs working against it.
Change the cam to a Crane 272 power max while your at it.
I had a Dynagear double roller in my old engine and had no trouble, but it was only a stock L-48, so I can't say how it would work in a higher powered engine.
It's picture time - Crane billet steel timing set on my fully studded stroker
If you think that crank shaft looks funny to you it's because it's a black nitrided 40 lbs 4340 forging.. I'm also not done with the metal flake blue motor paint job.
Good 'ole basic Cloyes will do anything you want. I use it with my roller and I out it right back in this last time around after two years of street running.