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Author Topic: 170Va harmonic balancer diameter  (Read 1031 times)

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Offline GF

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170Va harmonic balancer diameter
« on: August 28, 2008, 03:50:55 PM »
Does anyone know the diameter of the harmonic balancer for the 170 series?  I would think that the 170V,Va ,Vb and S would all be the same.  My car is not accessible so I can't measure.

The reason I ask is because I am having a 6volt alternator built and need to decide on the pulley size for the alternator.  The pulley on my generator is 3 inches and I was thinking of using a 2.5 inch pulley on the alternator to get more revolutions at idle.  Any comments or advice is welcomed.  Has anyone done a 6volt alternator conversion?

Offline John Ellis

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Re: 170Va harmonic balancer diameter
« Reply #1 on: August 29, 2008, 02:24:08 PM »
George,
The outside diameter of the crankshaft pulley is approximately 130mm or about 5-1/8". 

By the way, what type alternator are you using?  There is an alternator site for classic cars with some good info on pulley size.

http://www.fifthaveinternetgarage.com/alternator/index.html
« Last Edit: August 29, 2008, 02:33:48 PM by John Ellis »
John Ellis
1953 170Vb
1958 190
2007 Porsche Cayman

Offline GF

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Re: 170Va harmonic balancer diameter
« Reply #2 on: August 29, 2008, 05:48:35 PM »
Hi John,

My local alternator shop is using a Delco-Remey S10.   He says the delco-remey are the only ones that he can convert.  We checked out the pulley alignment today using the original generator mounting bracket and it is off a tad bit.  He believes there is enough extra room on the shaft of the alternator to add a bushing to make it perfect. 

I decided to use a 2.5" or 2.75" diameter pulley in a 5/8" width. which ever is available.

When the alternator is complete I will give full details on the model,casting etc.

Thanks for the measurement and the link.

George