 Any use for a 6/29 ring and pinion? |
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| Peashooter |
 Oct 30 2014, 01:46 PM
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Member  Group: Members Posts: 163 Joined: 17-December 11 From: SW Ohio Member No.: 13,903 Region Association: None  |
I was wondering if any of you serious autocrossers have considered changing out the R&P? It seems like it would make a huge difference in how the car accelerates out of the tight bits.
The PO of my car was going to build it as an autox car, and bought a brand new Porsche ring and pinion set, in 6/29 ratio. I don't need it and was thinking someone may be interested? Bill |
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| crresind |
Dec 4 2014, 07:33 AM
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Newbie Group: Members Posts: 13 Joined: 8-June 04 From: Oceanside, California Member No.: 2,175 Region Association: Southern California |
There is really no good use for this ring and pinion setup. The ratio works out to 4.833:1 vs stock 4.428:1. This is an even lower, meaning stump-puller, ratio. It might be useful for a hill climb/rock crawler. The REAL reason that it is not practical for long term use is the fewer pinion teeth. It tends to wear out much more quickly.
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| ChrisFoley |
Dec 4 2014, 09:56 AM
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#3
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I am Tangerine Racing Group: Members Posts: 7,922 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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It has value in SCCA Improved Touring where gear changes are not allowed but R&P changes are allowed.
The stock gears are too tall for racing, even with a low rpm engine like stock. The short R&P gives a roughly 10% rpm increase at any given speed. |
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