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Old 04-22-2011, 02:11 PM   #61
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In for updates.

There doesn't seem to be **** in the NorthEast concerning reasonabley priced Torsens.

No yards have them and every add is directed towards the spec crowd:

"freshly rebuilt [pulled from a yard car with 140k] Torsen - $1400"

-Zach
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Old 04-22-2011, 02:15 PM   #62
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1995
Carrier
Mazda Miata MX5 NO ALUM. COVER, GEARS ONLY $250 Best Foreign Auto Salvage USA-PA(Aliquippa) E-mail 1-800-370-6002

1996
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Mazda Miata MX5GOOD LOCKERA4879$550Beasley Foreign Parts, Inc. USA-MI(Holly) E-mail 1-248-634-8681
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Old 04-22-2011, 06:32 PM   #63
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So far so good after one track day, it survived a full days abuse, no odd noises and operates smooth. It wasn't my car, but I did get to drive it for a few laps, and my opinion is it's very similar to the oem unit, the track was a new configuration and i didn't have my miata with to actually do a back to back comparison.

Bottom line is, it works as an lsd, and it didn't fail in any manner.
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Old 04-22-2011, 06:49 PM   #64
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That one in Aliquippa is about 3 miles from my house.
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Old 04-22-2011, 09:15 PM   #65
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Quote:
Originally Posted by donutbob View Post
So far so good after one track day, it survived a full days abuse, no odd noises and operates smooth. It wasn't my car, but I did get to drive it for a few laps, and my opinion is it's very similar to the oem unit, the track was a new configuration and i didn't have my miata with to actually do a back to back comparison.

Bottom line is, it works as an lsd, and it didn't fail in any manner.
That is good news but what are the specs on the car that was running the diff? Stock?
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Old 04-23-2011, 10:27 AM   #66
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The 4.3 7" open diff sitting in my garage is getting tempting to mess with now.
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Old 04-23-2011, 12:12 PM   #67
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Bust-the one in Aliquippa turned out to be an open.
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Old 04-23-2011, 03:05 PM   #68
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(zack morris's phone)

So what's the torque ratio of these obx diffs? Type I or ii?
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Old 04-23-2011, 04:12 PM   #69
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Quote:
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(zack morris's phone)

So what's the torque ratio of these obx diffs? Type I or ii?
I've read elsewhere that the ratio is about 2.1:1, but it depends on which quaife this is a copy of. Quaife isin't very forthcoming with this info for whatever reason.
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Old 04-23-2011, 04:34 PM   #70
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Old 04-25-2011, 09:54 PM   #71
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I just read this one...

http://forums.hybridz.org/index.php/.../page__st__180

Lots of really good info in there.

Also this one. I'll be doing this to my casing as well...

http://forums.clubrsx.com/showthread.php?t=520556

In the first link they discover that a lot of the times the gears are installed the wrong way forcing the gears to the middle under accel instead of the outer side of the casing. This causes huge force to be put on the washers.

So the 3 (or 4 if you're ---- like me) things to do.

1)replace washers
2)replace bolts
3)ensure the gears are installed the correct way
4)optional... clean all the burrs and glass bead the casing. I may even cryo the gears.

I ordered all the stuff i need including the diff.



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Old 04-26-2011, 12:18 AM   #72
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are there two sets of gears or do you have to recut the helicies?
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Old 04-26-2011, 12:52 AM   #73
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No you just flip them over to make a right hand helical a left hand helical.

Same way you can make a right hand tap a left hand tap by tapping a part from the bottom.
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Old 04-26-2011, 01:10 AM   #74
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OK after reading through that new stuff, I just tore open the obx diff again. I flipped the gears by taking the ones from the bottom and putting them on top. I'm going to trust that internet forum in that these units sometimes are assembled backwards.

Last edited by dustinb; 04-26-2011 at 01:27 AM.
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Old 04-26-2011, 01:40 AM   #75
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Quote:
Originally Posted by curly View Post
No you just flip them over to make a right hand helical a left hand helical.

Same way you can make a right hand tap a left hand tap by tapping a part from the bottom.
Very funny haha. Even funnier that I just tried to figure out how to flip the gear in my head.

There are two sets of gears in there that make up the torsen, basically one for each axle and some units come with them in the wrong orientation. The rsxforum thread that falcon posted is great
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Old 04-26-2011, 02:04 AM   #76
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Yeah no problem. Seems there are a bunch of guys running this in the Nissan R200 diff with 350ft'lbs and doing track days with no issues. And Honda guys with 600whp drag launching on them.

As much as it pains me to run an OBX product... the forums back it up as a decent budget diff if the few things I listed are corrected.

Dustin, were yours backwards?

The best way to really check it is to orient the diff as though it is sitting in the housing and mentally "turn" the input shafts. If you turn it that way, do the gears move outwards? OR inwards? You want outwards. And approx .090 of compression on the washers. That, along with 12.9 bolts should give you a fairly clunk free and good diff.
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Old 04-26-2011, 11:02 AM   #77
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Ah, so there is two sets of gears, one left hand helix, one right, and the left hand little gears and right hand middle gear is supposed to be on top when looking at it with the above orientation?
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Old 04-26-2011, 11:04 AM   #78
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Is there a way to put preload on these so it does not go open when you lift a tire?
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Old 04-26-2011, 11:15 AM   #79
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Quote:
Originally Posted by BenR View Post
Is there a way to put preload on these so it does not go open when you lift a tire?
I believe that's the point of stacking the washers in such a way to increase the height when stacked. they have to compress down when installed, and that provides some preload.
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Old 04-26-2011, 03:55 PM   #80
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So the washer tension determines preload, and possibly lock ratio?
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