PRODUCT DESCRIPTION
Fits: Big Block B/RB, Hemi
Internal Balance
7.01" Diameter, 11.03 LBS, Race Use, Each
PRO/RACE Features:
• “ALL STEEL” construction
• Exceeds SFI Spec. 18.1 - Spin tested to 18,000RPM
• Specially formulated bonded* elastomer
• 100% CNC machined.
• Billet steel inertial ring and hub
• Splined inertia ring and hub
• 60° of engraved timing marks (40° on SB Ford models)
• Easily installed - Instructions included
* Bonding on “Race” models only.
The PRO/RACE Damper
The PRO/RACE “ALL STEEL” Harmonic Dampers are designed and manufactured for racing and high performance street applications and are available for a wide range of engines. The PRO/RACE Damper is a direct replacement for the cast iron stock damper which is no longer permitted by most racing sanctioning bodies due to the danger of fracture and high speed disintegration or separation of the inertia ring from the hub. This problem is eliminated with a PRO/RACE Damper. The PRO/RACE “ALL STEEL” Harmonic Damper is also a must for all belt driven supercharger applications due to the additional torque loads on the damper hub and keyway which results in failure in nearly 100% of all blower installations with a stock damper.
Exceeds SFI Specification #18.1
This specification is enforced by most racing sanctioning bodies to assure that the dampers conform to specified standards. While the SFI test is quite stringent and requires the damper to be spin tested at a speed of 12,000 rpm for a period of one hour, the PRO/RACE Damper has been tested at a speed of 18,000 rpm, substantially exceeding SFI requirements.
PRO/RACE Dampers are manufactured to extremely high quality standards that are constantly monitored and checked at every step of the manufacturing process.
Our quality levels in bore tolerance and the finish of the machined surfaces, in particular the critical oil seal area, far exceed OE standards and those of competitive models. Sixty degrees (60°) of computer generated timing marks (40° on Ford units) are accurately laser engraved. PRO/RACE Harmonic Dampers also feature engraved timing marks at 0°, 90°, 180°, and 270°.
Once assembly of the damper is complete, the entire damper is highly polished and then treated with a clear protective coating providing an extremely attractive appearance. Our instruction sheets make installation a snap. Our Dampers are designed for a direct replacement of the stock damper which means all your accessory pulleys still line up without modification. The dampers will accept most crank trigger wheels.
Harmonic dampers are supplied in two styles; those for internally balanced engines and those for externally balanced engines. Externally balanced engines have a counterweight bolted into the hub of the damper. The advantage of having a removable counterweight in the hub eliminates the possibility of having the counterweight mass move from its position.
