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 Post subject: LSD for Z31
PostPosted: Fri Oct 07, 2016 12:30 am 
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Joined: Sun Jun 30, 2013 3:33 pm
Posts: 4
Hi, I'm looking for a limited slip diff for a Z31. This is for a lemons race car, it needs to survive for 16 hours of hard running on a road course. Willing to purchase, borrow, rent, or any other creative option.

Thanks.


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 Post subject: Re: LSD for Z31
PostPosted: Fri Oct 07, 2016 10:12 am 
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Joined: Wed Apr 09, 2008 5:53 pm
Posts: 12937
Location: CT
Is that the one with the finned rear case?
What other cars (beside the Z31) used it?
How can I tell if it's an LSD by looking at it?

_________________
1970 240Z


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 Post subject: Re: LSD for Z31
PostPosted: Fri Oct 07, 2016 11:02 am 
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Joined: Sun Jun 30, 2013 3:33 pm
Posts: 4
Z31.com has a bit of info on when the factory shipped the LSD ---
http://www.z31.com/mods/drivetrain/differential.shtml

I'll see if I can find a picture. I have never actually seen one myself.

There were also a number of aftermarket solutions that could be used to modify the stock open diff. Some of these are real junk and are available on ebay, after checking those out I find they are not suitable for race use and would likely induce a failure. Some of the more robust solutions came from companies like Cusco but I can not seem to locate any. I figured someone here might have one "hanging around", it was worth a shot anyway.

thanks for the reply


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 Post subject: Re: LSD for Z31
PostPosted: Fri Oct 07, 2016 1:09 pm 
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Joined: Sun Jun 30, 2013 3:33 pm
Posts: 4
Yes, the fins would seem to indicate there's an LSD inside ---

http://forums.nicoclub.com/rare-z31-eur ... 18988.html


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 Post subject: Re: LSD for Z31
PostPosted: Fri Oct 07, 2016 11:04 pm 
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Joined: Wed Apr 09, 2008 5:53 pm
Posts: 12937
Location: CT
If nobody chimes in saying they have one laying around their garage gathering dust, I suspect your best chance of finding one might be with our member Paul M in Rhode Island

[http://forums.ctzcc.com/memberlist.php?mode=viewprofile&u=719] ,

or with our member Clive (Evil Z) in New Yawk,

[http://forums.ctzcc.com/memberlist.php?mode=viewprofile&u=755],

or with Bedini Motorsports in New Milford

[http://www.ctzcc.com/images/bedini.pdf].

Give Vinny Bedini a call at 860-355-182*9 and tell him you're our Club member (so is he) and ask if he has what you're looking for. He has a huge inventory of good used parts in his Z speed shop business, just like Paul has.

Frank

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1970 240Z


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 Post subject: Re: LSD for Z31
PostPosted: Sat Oct 15, 2016 5:04 pm 
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Joined: Wed Feb 29, 2012 11:44 am
Posts: 588
Location: New Haven, CT
For quality aftermarket clutch-type units, Cusco, Tomei, Nismo, Kaaz are all good buys. You want to get the models for the 240SX (non VLSD). I have the Tomei 2-way and it works great. Check out: http://www.frsport.com/Tomei-562021-Tec ... _1374.html

Used OEM LSDs for the Z31 are pretty much all gone. The few that are left typically fetch a price higher than a brand new aftermarket unit.

For Helical LSDs, Quaife makes a high quality, but pricey product with a lifetime warranty.
The cheap eBay flavor is known as the OBX r200 helical. There are some forum posts about it and it is not a half bad copy of the quaife, but the hardware (bolts, spring washers) are trash. Check here: http://rbryant.freeshell.org/obx_washers.htm

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Justin
1986 Z31 NA 2+0


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