Fluidampr – Evo 4/5/6/7/8/9

Price: $322.00

A harmonic balancer reduces destructive crankshaft torsional vibration to reduce wear on critical internal engine components.

Fits these Applications:
1996-2006 Mitsubishi Evolution IV V VI VII VIII IX

Part Number: 610701
OD: 6-1/8″
Bore Diameter: 1.7328″
Length: 1.779″
Weight: 6.8 pounds
Rotating Weight: 4.5 pounds
Engine Type: Internal
Finish: Black Zinc Chromate

Fluidampr Engine Dampers are designed to control destructive vibrations which are transfered thru the crankshaft.

Each time the air/fuel mixture inside a cylinder is ignited, the combustion that occurs creates a torque spike that is applied to the crankshaft through the piston and rod. This torque spike is so severe that it not only turns the crankshaft, it actually twists the crankshaft ahead of its normal rotation and then the crankshaft rebounds. This twisting action is known as torsional vibration. When these torque spikes and forces get into phase with the natural frequency, critical torsional harmonic vibrations occur and can be seriously destructive to the bearings and the crankshaft. Dampers are designed to control those destructive vibrations.

Critical harmonic vibrations occur numerous times in a engine’s operating range. Stock rubber and elastomer-type dampers are frequency sensitive “tuned absorbers”, and work at only one critical frequency. In the case of a stock rubber damper, it is tuned for a factory engine’s critical harmonic vibrations. If you change the mass of pistons, rods, or the crankshaft, you change the natural frequency of the crankshaft assembly; therefore, the stock damper is no longer tuned to the new frequency of vibration, and you may be headed for early failure of expensive engine components. Dampers also create heat while they work, and rubber is a poor dissipator of heat. This heat and the exposure to the elements deteriorates rubber, causing it to crack and change durometer, which then leads to inertia ring slippage, damper failure, uncontrolled torsional vibration, and costly engine parts breakage.

The Fluidampr Harmonic Balancer Crank Pulley replaces your crank pulley to control the harmonics through all RPM ranges of your engine. The precision machined and balanced internal inertia ring inside the precision machined and balanced housing is constantly shearing through the silicone tuning to the harmonic frequency bandwidths that your engine is producing real time.

Rubber (elastomeric) dampers are only tuned for a specific narrow bandwidth of harmonics and they cannot tune up or down to what your engine is producing. They also wear out and have to be rebuilt or re-tuned frequently. The Fluidampr products never wear out or have to be re-tuned, as they are constantly balancing the engine to max efficiency via the internal inertia ring. Fluidampr also helps to calm down the chatter associated with double disc clutches.

Decreased engine vibration. No more flywheels, crank trigger wheels, or timing gears falling off of the crankshaft. This was unavoidable when revving past 8000rpm in the past.

  • Decreased “Clutch/Gear Box Chatter” which is caused by lightweight single mass flywheels.
  • Reduction in rpm drops when shifting in a competitive environment.
  • Gains of 3-10whp and 5-13ft/lbs. of torque depending on your current setup.
  • An overall more efficient and reliable engine.