Determining top dead center
(Add link, text, image; minor clean up; format) |
(→Rebuilt dampers) |
||
| Line 29: | Line 29: | ||
==Rebuilt dampers== | ==Rebuilt dampers== | ||
| − | One noted place to buy a rebuilt damper/balancer is [http://www.damperdoctor.com/ Damper Doctor]. They disassemble stock, OEM production dampers, clock the hub to the ring and reassemble the unit with new elastomeric material pressed together under tremendous hydraulic pressure. An 8" damper for a 350 Chevy can be had for a mere $32.95 (ca. 2012), deal of the century!!!! | + | One noted place to buy a rebuilt damper/balancer is [http://www.damperdoctor.com/ Damper Doctor]. They disassemble stock, OEM production dampers, clock the hub to the inertia ring and reassemble the unit with new elastomeric material pressed together under tremendous hydraulic pressure. An 8" damper for a 350 Chevy can be had for a mere $32.95 (ca. 2012), deal of the century!!!! |
| − | The option is a used damper/balancer that may be clocked worse than the one you have or an aftermarket damper/balancer that will cost more money and may not have been correctly machined on the inner hub diameter. Some of these Chinese dampers being sold are either oversize or undersize for the production crank snout diameter. The damper/balancer MUST BE A SNUG PRESS-FIT on the crank in order to properly transfer harmonics from the crankshaft to the damper/balancer hub. | + | The option is a used damper/balancer that may be clocked worse than the one you have or an aftermarket damper/balancer that will cost more money and may not have been correctly machined on the inner hub diameter. Some of these offshore (Chinese) dampers being sold are bored either oversize or undersize for the production crank snout diameter. The damper/balancer hub MUST BE A SNUG PRESS-FIT on the crank in order to properly transfer harmonics from the crankshaft to the damper/balancer hub and on to the inertia ring, where harmonics are dissipated. |
| − | On a street engine or a drag race engine down to 11.00 E.T. in the quarter mile, an OEM-type damper/balancer may be used legally. At 10.99 E.T., an aftermarket SFI-18.1 damper/balancer is required. | + | On a street engine or a drag race engine down to 11.00 E.T. in the quarter mile, an OEM-type damper/balancer may be used legally. At 10.99 E.T. and quicker, an aftermarket SFI-18.1 damper/balancer is required. Blower motors normally do not use a balancer/damper, but instead, use an aluminum toothed hub on the crank snout to drive the blower. On these blown motors, the large Gilmer drive belt functions as a dampener to dissipate crankshaft harmonics. |
===Damper suppliers=== | ===Damper suppliers=== | ||
Your Privacy Choices