8" CHEV SB RACE FLUID DAMPER Suits: 383 - 400 Fluid Dampers consist of a forged 1025 steel housing and a steel hub. Timing marks printed on the outer ring of the black anodized finish for accurate timing The housing is filled with a high viscosity silicone fluid with nylon ring and positioning guides surrounding a freely rotating; iron inertia ring harmonically balances with high engine RPM's to absorb the torsional vibration put out by the rotating assembly. How does it work? When crankshaft torsional vibrations occur, the outer housing of the damper reacts with the crankshaft, twisting as it rotates; while the inertia ring attempts to rotate at a constant speed. This relative motion between the inertia ring and housing causes the inertia ring to shear the silicone fluid: which reduces the destructive torsional vibrations of the crankshaft. When left unchecked, these vibrations may lead to a cracked or broken crankshaft, valve train problems and premature bearing wear.
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