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robertb robertb is offline
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Join Date: Mar 2004
Location: Scottsdale, AZ
Posts: 67
Alternator Belt size?

I have a 79 930 and the 10 x 710 belt seems way too tight. I have all of the shims on the inside of the pulley and still too tight, I am missing 2 shims, I only have 4 so don't know if 2 could make that much of a difference but I don't think so. I tried a 29 inch belt which works but is too loose with all of the shims on the outside.

So tomorrow I'm going to buy 2 more shims and a 10 x 725 belt which I think will fall in between a 29 inch and 710 (I think 710 is approx 28 inch and 725 is approx 28.5 inch). Why would my belt be different? Seems almost like I have a normal 911 pulley on there. Is the 930 crank pulley smaller than a regular 911? Wouldn't you want the 930 pulley to be bigger than the 911 for more cooling?

Car is also a European model, don't know if that would make any difference.

Last edited by robertb; 10-18-2007 at 08:09 PM..
Old 10-18-2007, 08:04 PM
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