ATI Super Damper for the 1990-1996 Nissan 300ZX (Z32) is designed exclusively for high performance engines. 

This is recommended for any high HP motor. 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 connecting 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.

Features:

• Eliminates torsional crankshaft vibrations
• Exceeds SFI 18.1 specs
• Black zinc chromate finished
  
• Tunable, rebuildable, and extremely efficient at ALL RPM
• Laser engraved 360° timing marks

General Specifications:

• 12% underdriven AC and H2O/Alt pulleys
• 6% underdriven PS pulley Rated for 600 HP engines
• Weighs 6.13 lbs
• Aluminum outer shell and pulleys
• Integral hub and inner shell (not removable)
• Built in the USA

Race Specifications:

• 3 Ring
• 6.78'' OD
• Total Weight: 4.5 lbs
• Inertia Weight: 2.4 lbs
• Rated to 1000HP

Street Specifications:

• 3 Ring
• 5.5'' OD
• Total Weight: 3.6 lbs
• Inertia Weight: 2.27 lbs
• Rated to 600HP

ATI's patented Super Damper is the only harmonic balancer developed exclusively for high-RPM performance engines (6000+ RPM). Its proven elastomer design is 2-in-1: a 4" diameter damper and a 7" diameter damper in two shells that bolt to the crank hub.

Inner and outer shells are aluminum or steel to contain the steel inertia weight. The inertia weight has eight computer-machined grooves to retain the proper durometer O-rings (installed at ATI and dyno tested for each application). O-ring life has been tested in Winston Cup competition over two million cycles and in drag racing engines for 10 years (exceeds SFI 18.1 specs). Units can be rebuilt by installing new O-rings. Shells have a black zinc chromate finish with computer-controlled, laser-engraved 360° timing marks.