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Aircon pulley


IanDD
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Probably a new boy question, but is it OK to machine off the aircon v-belt part of the crank pulley on my '84 3.2 911 motor?

It's a heavy, solid combined pulley, but I want to make sure it's not acting as some sort of harmonic balancer.

Cheers

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It just appears to be a workman like solution to provide an extra pulley rather than any attempt at a harmonic balancer.  Similarly, Porsche didn't use a harmonic balancer style pulley on either the earlier or later air cooled engines so I think you are pretty safe to machine away.

However, what are you really likely to achieve by lightening?  What happens if you or a later owner wants to revert to AC?  It would be a pain to replace!

If you are trying to make your 3.2 more responsive and revy, you need to focus on updating the EFI and ideally going twin plugs. 

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