Torsen questions
#1
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Torsen questions
I've got an open rear in my '02, so it obviously needs a limited slip. I have a lead on a used RX7 clutch type for just over $400, but what I've read here makes me think the torsen would be better for autocross and street driving at ~250whp.
Any suggestions on where to look for a used torsen unit? Planet-miata doesn't have one right now, the classifieds haven't listed one without the whole assembly for as long as I've been looking, Partsgroup is closed until Tuesday, and Ebay only has ones shipped from Japan.
Also, will the internal torsen unit from an MSM just bolt into my open diff? I know the whole swap requires the axles, but I can't find anything about just the LSD.
Oh, and one last thought I just had: Would it be easier and no more expensive to just do the whole swap and sell my open diff afterward?
Any suggestions on where to look for a used torsen unit? Planet-miata doesn't have one right now, the classifieds haven't listed one without the whole assembly for as long as I've been looking, Partsgroup is closed until Tuesday, and Ebay only has ones shipped from Japan.
Also, will the internal torsen unit from an MSM just bolt into my open diff? I know the whole swap requires the axles, but I can't find anything about just the LSD.
Oh, and one last thought I just had: Would it be easier and no more expensive to just do the whole swap and sell my open diff afterward?
#2
.
I've got an open rear in my '02, so it obviously needs a limited slip. I have a lead on a used RX7 clutch type for just over $400, but what I've read here makes me think the torsen would be better for autocross and street driving at ~250whp.
Any suggestions on where to look for a used torsen unit? Planet-miata doesn't have one right now, the classifieds haven't listed one without the whole assembly for as long as I've been looking, Partsgroup is closed until Tuesday, and Ebay only has ones shipped from Japan.
Craigslist, Spec Miata classifieds, Flyin' Miata salvage, email blake@isellmiataparts.com -I've had fantastic luck with blake
Also, will the internal torsen unit from an MSM just bolt into my open diff? I know the whole swap requires the axles, but I can't find anything about just the LSD.
To my understanding, yes
Oh, and one last thought I just had: Would it be easier and no more expensive to just do the whole swap and sell my open diff afterward?
Your open diff might be an upgrade for a 1.6 car if they aren't also looking for a torsen, but don't expect to get much money out of it
Any suggestions on where to look for a used torsen unit? Planet-miata doesn't have one right now, the classifieds haven't listed one without the whole assembly for as long as I've been looking, Partsgroup is closed until Tuesday, and Ebay only has ones shipped from Japan.
Craigslist, Spec Miata classifieds, Flyin' Miata salvage, email blake@isellmiataparts.com -I've had fantastic luck with blake
Also, will the internal torsen unit from an MSM just bolt into my open diff? I know the whole swap requires the axles, but I can't find anything about just the LSD.
To my understanding, yes
Oh, and one last thought I just had: Would it be easier and no more expensive to just do the whole swap and sell my open diff afterward?
Your open diff might be an upgrade for a 1.6 car if they aren't also looking for a torsen, but don't expect to get much money out of it
#3
Swapping the entire pumpkin and axles would be easier. If you get into just the LSD unit itself, you'll need to have a driveline shop/specialist assemble and set the backlash...which is more cost and downtime. This is worthwhile if you're adding an aftermarket LSD such as a Cusco,OSG,Quaife etc...
There is also Mazmart, Panic Motorsports, Parts Group and numerous single-person dismantling operations.
The MSM unit will require MSM axles as they are bigger and have more splines.
Be aware of the different R&P from year to year as well as you can get a TorSen with a 4.1, 4.3 or a 3.9.
The RX-7 LSD is an OK upgrade, but getting the preload can be a PITA..they like to go high or low, the sweet spot is hard to get. There are TONS of threads on m.net about this. IIRC FatherLeadfoot has a good comparison/review of the RX-7 CLSD and the different preloads and how it acts. $400 for one sounds kinda high.
http://forum.miata.net/vb/showthread.php?t=308131&
There is also Mazmart, Panic Motorsports, Parts Group and numerous single-person dismantling operations.
The MSM unit will require MSM axles as they are bigger and have more splines.
Be aware of the different R&P from year to year as well as you can get a TorSen with a 4.1, 4.3 or a 3.9.
The RX-7 LSD is an OK upgrade, but getting the preload can be a PITA..they like to go high or low, the sweet spot is hard to get. There are TONS of threads on m.net about this. IIRC FatherLeadfoot has a good comparison/review of the RX-7 CLSD and the different preloads and how it acts. $400 for one sounds kinda high.
http://forum.miata.net/vb/showthread.php?t=308131&
#5
http://atlanta.craigslist.org/nat/pts/2184707973.html
This guy is one of our locals, he parts Miatas for a living and is a very good guy. Don't know if he still has all of these or not, but it's a good start and the prices are fair. (I'd stay away frrom the 3.9 T-F diff as well.)
This guy is one of our locals, he parts Miatas for a living and is a very good guy. Don't know if he still has all of these or not, but it's a good start and the prices are fair. (I'd stay away frrom the 3.9 T-F diff as well.)
Differentials
2001 3.9 Torsen carrier 97K miles from a 6speed $695
2003 3.9 Tochiji Fuji LSD 39K miles from a 6speed $695
1999 4.3 Open carrier from a 5speed $325
1999 4.1 Open carrier from an automatic $275
1997 4.1 T2 Torsen carrier $595
2001 3.9 Torsen carrier 97K miles from a 6speed $695
2003 3.9 Tochiji Fuji LSD 39K miles from a 6speed $695
1999 4.3 Open carrier from a 5speed $325
1999 4.1 Open carrier from an automatic $275
1997 4.1 T2 Torsen carrier $595
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