Quote:
Originally Posted by Enigmus
I haven't heard of anyone having catastrophic damages done on the forums.. and I believe Perrin to be highly regarded by the Nasioc community. Yes there will be those .01% failure rates but it's the risk we take for the enjoyment of our cars!
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Regarding "balance" of the crank pulley: most engine configurations vibrate to hell, in order to lessen this manufacturers often have a dual purpose crank pulley. That is, the crank pulley also acts as a harmonic dampener to reduce the vibrations inherent to the engine design. Recall, I said most engine designs have vibrations; the horizontal/opposed-piston/flat engine does NOT. Therefore, the pulley doesn't need to act as a harmonic dampener. When queried about this in the early 2000s, SOA stated that the pulley was NOT a harmonic dampener. So people should stop talking about balance.
Issues seen with crank pulleys in Subaru applications typically manifest as misfires or ghost misfires/CELs, usually when used in conjunction with lightweight flywheels.