Pro-Rascer Balancer BB Chev 396 427 Internal balance  Dimension's 7.01 x 1.73 x 2.68, 

PERFORMANCE
PRO/RACER harmonic dampers are tuned and built for ultimate performance in the PRO/RACE range of dampers, providing the largest boost to the raw performance of your engine, allowing you to squeeze out every last horsepower with ease. You can buy a PRO/RACER damper with the utmost confidence it will provide many years of reliable, trouble-free service.

QUALITY
PRO/RACER harmonic 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, far exceed OE standards. PRO/RACER harmonic dampers also feature accurate laser engraved timing marks at 0, 90, 180 and 270 degrees (except Ford models). Once assembly of the damper is complete, the entire damper is highly polished and then treated with clear protective coating providing an extremely attractive appearance.

INSTALLATION
All PRO/RACER harmonic dampers come with installation instructions and spacer kits (where required) for pulley allignment. All PRO/RACER harmonic dampers are sold correctly balanced from our factory. As long as the factory balance of your original damper has not been changed, it will directly interchange. Bolt-in counterweights are sold separately.

ENGINE LIFE
Due to the superior performance of the PRO/RACER range of harmonic dampers and significantly reduced vibrations, a greatly improved engine life is obtained using PRO/RACER dampers. Why spend thousands of dollars on a race engine only to ruin it by using a substandard harmonic damper.

“RACER” vs “STREET”
PRO/RACER offers two styles of dampers for small and big block Chevys; a Racer model and a Street model. The difference is that on the Racer model the elastomer is bonded to the steel hub and ring. This bonding is particularly valuable on applications where sustained high speed is present such as marine or circle track applications. The Street models are suitable for moderate performance applications on engines making approximately 350 to 400 hp. The special splines (see cutaway photo) enhance the bonding between the elastomer and the inner hub and outer ring which helps prevent any outer ring radial movement, a common problem on OEM stock factory dampers. If you would like to use a Street style damper on a 400 small block simply combine our #64262 Street small block damper with our #65266 Counterweight and you will have the proper combination for that engine. Cutaway shows internal splines which provide for twice the contact area, eliminating any possible

EXCEEDS SFI SPEC #18.1
his 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/RACER Damper has been tested at a speed of 18,000 rpm, substantially exceeding SFI requirements.

LIGHTWEIGHT MODELS
We offer one SB Chevy and two Ford dampers with aluminum hubs. Also our #73265 is “All Steel” with a lightened inertia ring which reduces the weight of the damper by nearly 3.5 pounds. See Application Chart for all weights.

HIGH QUALITY STANDARDS
PRO/RACER 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/RACER Harmonic Dampers also feature engraved timing marks at 0°, 90°, 180°, and 270° (except Ford models). 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.

REMOVABLE COUNTERWEIGHTS
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. The PRO/RACER Damper for internally and externally balanced small block and big block Chevys and for small block Chryslers is identical except for the counterweight. This means, for example, if you have a PRO/RACER Damper for a 400 small block Chevy you can remove the counterweight and the damper will work perfectly for a 350 Chevy. Conversely, if you have a 350 Damper and want to use it on a 400 you can now purchase the proper PRO/RACE counterweight and bolt it into your 350 damper and it is now a 400 damper. All small block Ford dampers are externally balanced with a counterweight. This counterweight can be removed for use on internally balanced engines.

• “All steel” construction.
• Exceeds SFI Spec. 18.1
• Spin tested to 18,000 RPM.
• 60 degrees of permanently engraved timing
marks. (40 degrees on SB Ford models).
• Specially formulated bonded elastomer.
• 100% CNC machined.
• Billet steel inertia ring and hub.
• Splined inertia ring and hub.
• Accepts most crank trigger wheels.