torsional damper size

Apr 11, 2007 1 Replies

Hey guys,



What would be the advantages or diadvantages of running a certain size of damper. My crate 290/350 chev engine calls for either a 6.75 inch or 8 inch. I do plan on adding edelbrock heads and a roller cam. What size and why?Whats the difference?



6.75" - Lets the engine rev a small fraction faster, Less weight on the crank snout, smaller diameter makes it easier to fit in some engine bays. 8" - better damping due to the higher weight, easier to set timing due to larger markings, larger bolt circle allows a larger pulley for accessory drive (larger alternator, plow pump, HD stuff).

Just make sure that whatever size you use that you get the matching timing tab AND set it correctly.

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