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Bmw Harmonic Balancer And Belt Pulleys

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Hey guys,

I have a BMW harmonic balancer I got for my z but never ended up using

and found some belt pulleys also

$300

Located in Avondale heights, Melbourne

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For the uninitiated, can someone please explain the supposed benefits of the BMW unit over the standard item?

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Not 40 years old. I pulled the stock one off my L24 and found a massive crack coming from the key way. 

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BMW pulleys are thinner and larger diameter.

The biggest  advantage is that the rubber bond is not on the diameter, but on the face. 

Old racers would cross the finish line at full noise and back off. The sudden RPM change rip the bond clean off. With the BMW balancer, this failure stopped happening.

 

They need some modification to fit. Has the one for sale been done to be a bolt on?

Edited by luvemfast

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