| Just read some interesting information regarding the dangers of UDP's. It wasn't anything i hadn't read in the past but it prompted some renewed investigation. According to Unorthodox Racing : "We do not manufacture crank pulleys that replace or eliminate a damper in applications where the factory crank pulley is an actual harmonic damper (such as 90 degree V engines".... "A common misconception is that factory crank pulleys on certain vehicles are harmonic dampers. The fact is, on todays late model cars the factory crank pulley is designed to reduce NVH (noise / vibration / harshness), which does not affect crankshaft or bearing life. These are noises and vibrations from the engine compartment that may travel into the cabin of the vehicle when the engine is running and the stock crank pulley is used to reduce NVH for the occupants (similar to the use of resonators in the intake to quiet intake noise)".
I would like to know what people think about this information from UR's site and if they think they are accurate. My intial thought concerning this subject is that it all revolves around whether or not the damper on a stock app. like our Z's (especially the TT) is actually for dampening crank and bearing vibrations or is it for "cabin noise" vibration? According to UR our particular damper is for "cabin noise" and thus there is no damage done to our engine but others believe that the damper is for "bearing and crank vibration" and thus there to protect the engine.
Other than speculation and theory regarding the intention of our stock crank's damper application does anyone have "official" information from Nissan, JW, or someone else to help straighten this out? What about testimonials of good or bad?
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