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Short Ratio C&P for 924 S

 
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stv951  



Joined: 06 Mar 2005
Posts: 100

PostPosted: Wed Jan 20, 2010 7:58 pm    Post subject: Short Ratio C&P for 924 S Reply with quote

Hello guys,

anyone knows what is the shortest crown and pinion that can be installed on a 924S that is used for hllclimbs and shorts tracks ?
Can I use one from an Audi or is ony Porsche unit available with short final ratio ? I need the shortest available

TIA
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v8carreragts  



Joined: 05 Sep 2003
Posts: 665
Location: Tucson, AZ

PostPosted: Thu Jan 21, 2010 9:16 am    Post subject: Reply with quote

I believe the 4:11 used in the 80-82 US 924 would fit.
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stv951  



Joined: 06 Mar 2005
Posts: 100

PostPosted: Tue Jan 26, 2010 7:01 am    Post subject: Reply with quote

Interesting !!! Anyone to confirm this before i go out and buy it please ?
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stv951  



Joined: 06 Mar 2005
Posts: 100

PostPosted: Thu Feb 04, 2010 8:43 am    Post subject: Reply with quote

Bumper !
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Andrew NZ  



Joined: 22 Jun 2004
Posts: 744
Location: New Zealand

PostPosted: Thu Feb 04, 2010 4:46 pm    Post subject: Reply with quote

I've just bought a 4.78:1 out of an audi diesel, but won't know for sure if it'll fit for a few weeks. Will let you know when I've tried it.
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Andrew
1977 RX924 rally car
12a bridgeport
www.race4-dcup.co.nz
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v8carreragts  



Joined: 05 Sep 2003
Posts: 665
Location: Tucson, AZ

PostPosted: Fri Feb 05, 2010 8:16 am    Post subject: Reply with quote

They should both work. The only ones they won't fit is the 944 S/S2 and 951. In these the front pinion bearing is larger and the pinion shaft is 4mm longer than all previous 016's.
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stv951  



Joined: 06 Mar 2005
Posts: 100

PostPosted: Tue Feb 23, 2010 8:06 am    Post subject: Reply with quote

Andrew NZ wrote:
I've just bought a 4.78:1 out of an audi diesel, but won't know for sure if it'll fit for a few weeks. Will let you know when I've tried it.


hello Andrew,
what gearbox have you got ?
Which audi did this come from ?
I am very interested as if you managed to install it.
Please let me know
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stv951  



Joined: 06 Mar 2005
Posts: 100

PostPosted: Mon Mar 08, 2010 10:12 am    Post subject: Reply with quote

Bump
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stv951  



Joined: 06 Mar 2005
Posts: 100

PostPosted: Mon Mar 27, 2017 8:04 am    Post subject: Reply with quote

bumpie...
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Steve
931 81 177 bhp White
931 81 0 bhp engineless Platinum
924S 86 stripped with cage for Track days Red
944 83 Auto Blk
924 84 project 924 CGTS with 951 running gear
944 S2 90 Convertible 3xBlack
951S 91 Vitesse stg 3 350 bhp
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kevingross  



Joined: 15 Apr 2015
Posts: 23
Location: Stow, MA, USA

PostPosted: Sun May 07, 2017 9:34 am    Post subject: Reply with quote

Yes, the shorter ratios will work in the 924S transmission if you can find them. NLA for many years from Audi/VW. My advice if you can find one:

- Have it tested before installing, especially the pinion gear. I use a dye penetrant test (Magnaflux makes the kit I use) which will reveal surface cracking.
- Have the pinion depth set using the factory VW385 tool set. Correct set-up is critical to keeping the pinion from breaking. Bluing or eyeballing it doesn't work.

Good luck!
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Kevin
Catellus Engineering, Inc.
http://www.catellusengineering.com/
catelluseng@gmail.com
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