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ummm...I'm not sure... The formula requires mass for damping. "frequency = square root of ( k / m)" k = spring rate (stiffness of rubber in the oem pulley) m = mass There's a lot more into it. And tuning the damper is one heck of an expensive task.. Just wondering the fisher pulley is tuned for 300ZX or just for all applications. If Fisher tunes different damper for different cars, I am amazed how cheap they sell the damper.
"We feel that the power pulley is a bad way to get extra power from and engine and the potential for serious engine damage is too great.".............Steve Dinan
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