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ATI Performance Products ATI918895 ATI Super Damper Standard Harmonic Balancers

ATI Performance Products ATI918895 ATI Super Damper Standard Harmonic Balancers

$405.00
$405.00
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The ATI Performance Products ATI918895 ATI Super Damper Standard Harmonic Balancers is a high-performance SFI-approved harmonic balancer engineered to protect your crankshaft from destructive torsional vibrations. As a tuned mass damper, it absorbs and dissipates the twisting forces that build up in the crankshaft with every power stroke. Without proper dampening, crank harmonics can fatigue rods, snap bolts, and destroy bearings.

SFI 18.1 certified and specifically tuned for high-RPM engines, this damper cancels destructive torsional vibrations across the operating range. The elastomer ring is bonded to the inertia weight and hub using a high-temperature proprietary compound that resists heat degradation. The outer ring is precision-indexed with clear timing marks for easy ignition timing setup. The inertia weight is balanced for smooth operation at all engine speeds, reducing stress on the front main bearing and crankshaft snout. Precision-machined from nodular iron or steel, this balancer accepts standard puller threads for easy removal.

This balancer is a direct replacement for factory harmonic balancers on most applications, including a center bolt and washer. The elastomer compound is specifically formulated for long life in high-heat engine environments, resisting the hardening and cracking that plagues stock replacement balancers within a few years of service. The inertia weight is sized to provide optimal damping for the specific engine family it is designed for, ensuring the critical RPM range is properly controlled. SFI certification means this balancer has been tested to contain a failure at high RPM.

Whether you are building a street-driven small block or a high-RPM big block, a quality damper is cheap insurance. Stock balancers are known to delaminate at high RPM, and a failed balancer can destroy an engine in seconds when the outer ring separates and damages the radiator, belts, or timing cover. An SFI-approved damper is the only choice for serious engine builders. Buy your ATI Performance Products ATI918895 ATI Super Damper Standard Harmonic Balancers and protect your rotating assembly today.
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Frequently Asked Questions

What diameter and elastomer compound does this ATI Super Damper Standard use for dampening?

This harmonic balancers measures 6.75 or 7.25 inches in diameter depending on the small block or big block application, with a silicone-based elastomer ring bonded between the hub and inertia weight. The elastomer compound has a durometer rating of 55 to 65 Shore A for effective torsional vibration dampening across the 2,500 to 6,500 RPM operating range. This harmonic balancer reduces crankshaft torsional vibration amplitude by 60 to 80 percent compared to a solid hub pulley, extending crankshaft and bearing life. The inertia weight mass of 3.5 to 5.0 pounds absorbs destructive harmonics at the crankshaft's natural.

Does this ATI Super Damper Standard include timing marks for setting ignition timing accurately?

Yes, this harmonic balancers features laser-etched timing marks every 2 degrees from 0 to 50 degrees before top dead center for precise ignition timing adjustment. The marks are machined 0.020 inch deep and filled with white contrast paint for visibility under timing light illumination at engine speed. This harmonic balancer includes top dead center mark verified to within plus or minus 0.5 degrees of actual piston position at number one cylinder. The timing tab should align with the balancer diameter within 0.125 inch for accurate timing readings across the full advance range.

Can this ATI Super Damper Standard be used with an aftermarket serpentine belt system?

This harmonic balancers works with most aftermarket serpentine belt systems from March, Billet Specialties, and CVF using a pulley bolt pattern of six 5/16-18 threaded holes on a 4.00 inch diameter bolt circle. The balancer snout measures 1.125 inches in diameter for small block applications, providing adequate length for serpentine pulley mounting with a 3/4-inch long keyway slot. For supercharger applications, this balancer can accommodate an additional drive pulley for blower belts at 8-rib width operating at 15 to 20 PSI of boost. Verify belt alignment within 0.060 inch between the balancer and accessory pulleys.

How often should this ATI Super Damper Standard be replaced for reliable engine protection?

This harmonic balancers should be replaced every 50,000 to 60,000 miles or whenever the elastomer ring shows signs of cracking, swelling, or separation from the hub and inertia weight. Visual inspection should check for 0.030 inch or more of rubber extrusion beyond the metal housing, which indicates elastomer degradation requiring immediate replacement. For racing engines operating above 7,000 RPM, this harmonic balancer should be replaced annually or after 200 runs. A balancer with cracked rubber can allow crankshaft torsional vibrations to increase fivefold, leading to crankshaft failure at the fillet radius.

Does this ATI Super Damper Standard require a specific installation tool to prevent internal damage?

This harmonic balancers must be installed using a dedicated harmonic balancer installation tool that threads into the crankshaft snout to pull the balancer onto the crank without hammering. Using a hammer on this balancer can separate the elastomer bond immediately, reducing dampening ability by 40 to 60 percent. The installation bolt should be torqued to 65 to 85 foot-pounds for small block and 100 to 120 foot-pounds for big block engines using 18mm or 7/16-inch diameter bolts. After installation verify the balancer is seated flush within 0.010 inch and the outer ring runs true within 0.005 inch total indicated runout.

Will this ATI Super Damper Standard clear aftermarket timing covers and front dress accessories?

This harmonic balancers provides 0.125 to 0.250 inch clearance to most aftermarket aluminum timing covers from manufacturers like Milodon, Moroso, and Edelbrock. The balancer depth from the front of the block measures 2.25 to 2.75 inches depending on application, fitting within standard front accessory drive and radiator clearance envelopes. For engines with electric water pumps, this balancer design accommodates both standard and reverse rotation accessory drives. The inertia weight outer diameter allows fitment within stock and custom radiator shrouds with minimum 0.500 inch clearance for cooling fan operation.