September 7, 2000Has any one ever heard of a timing chain set up that would retard on decell and advance on excell. I told that this was old this is an old racing trick but thay could never keep it from coming apart .The set up used like a snow machine clutch set up.Can any one give me any input on the subject or a web site on it.
January 27, 2004I am rebuilding my `74 350 Chevy,can anyone tell me if is a "true roller" timing chain or a double roller timing chain is worth the money or is a regular steel timing set as good for a mild cammed non-racing rig used primarily for towing. Also whats the difference between the two except the double roller looks like two chains side by side? Will they fit under a stock cover?
January 27, 2004It depends on how you`re going to drive. The double roller chain is definitely better because it `stretches` less and the timing will stay more accurate. Not only that but it will actually reduce the `drag` of the chain because the double roller is more flexible. An even greater reduction is seen using the `true` roller, but the double roller should be plenty enough. .... I don`t know how it is now, but GM used to use a nylon toothed cam gear in order to isolate vibrations from the crankshaft to allow the cam to break in more smoothly. They should`ve stated in the owner`s manuals that these gears should be replaced at around 25,000 miles. A lot of people would`ve avoided a lot of headaches if this was done .... ... The double roller chain and gears should fit under the normal timing case cover ...... When I rebuild a small block Chevy I usually install a two piece timing cover, less hassles to take apart, and use the nylon gear to break in a new cam. After a few months, when I`m satisified with the way the engine`s running, I remove the timing cover plate and replace the stock timing chain set-up with a double roller ...
[ 01-27-2004, 02:43 PM: Message edited by: fmthefixer ]