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LSD

 
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chad-tanner  



Joined: 23 Mar 2008
Posts: 217
Location: New Madrid,MO

PostPosted: Sun Aug 03, 2008 9:38 pm    Post subject: LSD Reply with quote

I posted this in the general discussion by mistake,I had intended, to only post it here....I get lost sometimes...


Has anyone here converted their open diff to a true LSD,using a method such as this.

I bet you never seen this before







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77.5 Porsche 924/4.9L cadillac swap

Inspector: These brakes look completely inadequate.
Burt Munro: Well, I'm planning on going, not stopping.
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Lizard  



Joined: 03 Nov 2002
Posts: 9364
Location: Abbotsford BC. Canada

PostPosted: Mon Aug 04, 2008 1:34 am    Post subject: Reply with quote

technically a phantom grip unit iirc.
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alexvex  



Joined: 31 Jul 2006
Posts: 420
Location: Seattle, WA (from Indiana)

PostPosted: Mon Aug 04, 2008 1:41 am    Post subject: Reply with quote

looks like a phantom grip....i'd never put one in my car though...do it right or not at all
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--Alex--
1992 Porsche 968 (VW 2.5L I5 Turbo swap in the works)
1995 Audi 90 Quattro Sport (4.2L V8 Swap)
2010 Touareg TDI
Past Pcars: 80 931, 87 924S, 87 951
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chad-tanner  



Joined: 23 Mar 2008
Posts: 217
Location: New Madrid,MO

PostPosted: Mon Aug 04, 2008 1:59 am    Post subject: Reply with quote

alexvex wrote:
looks like a phantom grip...


Thats what their lawyers said to!!!
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77.5 Porsche 924/4.9L cadillac swap

Inspector: These brakes look completely inadequate.
Burt Munro: Well, I'm planning on going, not stopping.
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chad-tanner  



Joined: 23 Mar 2008
Posts: 217
Location: New Madrid,MO

PostPosted: Mon Aug 04, 2008 2:23 am    Post subject: Reply with quote

Lizard wrote:
technically a phantom grip unit iirc.


Is there anyone here running a phantom grip diff conversion?
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77.5 Porsche 924/4.9L cadillac swap

Inspector: These brakes look completely inadequate.
Burt Munro: Well, I'm planning on going, not stopping.
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Smoothie  



Joined: 01 Jan 2003
Posts: 8032
Location: DE (the one near MD, PA, NJ)

PostPosted: Mon Aug 04, 2008 3:12 am    Post subject: Reply with quote

Big secret, so don't tell anyone, but.. - "try the search function".
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"..it's made in Germany. You know the Germans always make good stuff."


'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox
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simsport  



Joined: 06 Nov 2002
Posts: 573
Location: UK Warrington

PostPosted: Mon Aug 04, 2008 9:48 am    Post subject: Phantom Grip Reply with quote

I am. Works well, not as well as a proper ZF plate type but not bad. I have heard the stories about these units but as long as you do the prep work its ok. Works well as locker at launch but not as good when unloading wheels in corners.

Cheers
Simon
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wombat  



Joined: 07 Jun 2008
Posts: 422
Location: Melbourne, Australia

PostPosted: Tue Aug 19, 2008 10:56 pm    Post subject: Reply with quote

Question: Was LSD an option with manual cars and standard on autos? This is for some reason what I thought but I dont know why I thought this.
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ideola  



Joined: 01 Oct 2004
Posts: 15548
Location: Spring Lake MI

PostPosted: Wed Aug 20, 2008 1:39 am    Post subject: Reply with quote

I've never heard of an auto with LSD. The only gear box that even offered it as an option was the snailshell. I don't believe the pre-944 audi-based 924 gearboxes ever had LSD as an option from the factory.
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RC  



Joined: 25 Mar 2007
Posts: 2636
Location: Australia

PostPosted: Wed Aug 20, 2008 2:39 am    Post subject: Reply with quote

Recall reading something like that in the haynes. More BS than wishful thinking.

Am positive that if you jack your rear wheels up, handbrake off, trans in N, and rotate one wheel the other will turn in the opposite direction, indicating an open wheel diff. With a LSD both wheels will rotate the same way.

FYI the 924 and 944 autos are essentially the same transmission, Audi/VW 087. Minor differences such as ports for the cooler but the internals are identical, and AFAIK the ratios too. The diff ratio may be taller though.
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ideola  



Joined: 01 Oct 2004
Posts: 15548
Location: Spring Lake MI

PostPosted: Wed Aug 20, 2008 2:58 am    Post subject: Reply with quote

RC wrote:
The diff ratio may be taller though.

Yes, this is the case, and many have reported it to be unsuitable for the 924, unless you REALLY enjoy winding out in 4th gear.
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