Obx Lsd Helical Differential !?
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03-09-07, 08:50 PM
#8
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good luck finding a Miata one that is in great condition and isn't priced ridiculously high. i have been searching every now and then and haven't found one.
you can actually source the guts from Mazda motorsports, and it will be all new parts. but again, not cheap.
i've been tempted to try the OBX just because it is fairly cheap, and see how long it takes to break. or maybe it won't on an NA. who knows...
a more reliable and cheaper option is to swap for TII components and put a FD torsen diff in the rear. adds a bit of weight though.
the stock clutch-type LSD seems to work ok for me. i haven't been on the track or auto-x enough to really say "damn i need a torsen", so IMO if you can't explain why you need it, might not be worth it.
you can actually source the guts from Mazda motorsports, and it will be all new parts. but again, not cheap.
i've been tempted to try the OBX just because it is fairly cheap, and see how long it takes to break. or maybe it won't on an NA. who knows...
a more reliable and cheaper option is to swap for TII components and put a FD torsen diff in the rear. adds a bit of weight though.
the stock clutch-type LSD seems to work ok for me. i haven't been on the track or auto-x enough to really say "damn i need a torsen", so IMO if you can't explain why you need it, might not be worth it.
03-09-07, 08:56 PM
#9
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I recently bought a T1 torsen in good condition for $350. Look in the www.miata.net classifieds, there's usually some there, but they tend to go for $600+, but you usually need to buy the whole rear end, mine was just the diff.
03-09-07, 08:59 PM
#10
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you got lucky for $350. 
yeah the only ones i've been able to find are between $500-$800. i figure it's not really worth it.
but i guess i could try harder. i'm sure getting one off a crashed Miata from a junkyard might be cheap, but that doesn't happen every day.
yeah the only ones i've been able to find are between $500-$800. i figure it's not really worth it.
but i guess i could try harder. i'm sure getting one off a crashed Miata from a junkyard might be cheap, but that doesn't happen every day.
03-10-07, 12:54 AM
#12
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Yea I was lucky to get it for $350, but the weird thing is that it was in the miata.net classifieds for several weeks before I bought it.
For drifting you'll be better off with a clutch type most likely. You can get a used S4 LSD and rebuild it to have more preload and you should be good.
For drifting you'll be better off with a clutch type most likely. You can get a used S4 LSD and rebuild it to have more preload and you should be good.
03-10-07, 01:30 AM
#13
I'd imagine that they are probably just copies of the miata and FD torsen made with their own materials, no one has done any real testing on them so no one really knows other than anyone can just come out and say "Cheap chinese piece of crap" wether it's true or not.
03-10-07, 12:09 PM
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The way the torsen works puts a lot of stress on the gear teeth. Gear teeth aren't that good at taking stress. That's why you want to be sure that it's made of the right materials, made in the correct way and with proper QC. I doubt that OBX went to the same amount of effort to make it durable as Mazda and their supplier would have done.
03-10-07, 09:59 PM
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any of the aftermarket clutch-type diffs would be a better choice. cusco i believe makes them, but maybe not for the NA.
in any case it's going to be about $1000+.
the stock S4 LSD is less aggressive, but used ones can be found that are still in working condition, and rebuilding one doesn't cost too much (although requires some skill).
torsen type diffs are better suited to road courses and autocross usage, although you would probably be hard pressed to screw up an FD torsen. but in terms of lock-up characteristics torsens work to help keep torque balanced. this means it will work hard to keep as much grip as possible, and this is harder to "break loose" than a LSD diff. but i'm not a "drifter" or anything, so i'm not quite sure how it would actually perform.
in any case it's going to be about $1000+.
the stock S4 LSD is less aggressive, but used ones can be found that are still in working condition, and rebuilding one doesn't cost too much (although requires some skill).
torsen type diffs are better suited to road courses and autocross usage, although you would probably be hard pressed to screw up an FD torsen. but in terms of lock-up characteristics torsens work to help keep torque balanced. this means it will work hard to keep as much grip as possible, and this is harder to "break loose" than a LSD diff. but i'm not a "drifter" or anything, so i'm not quite sure how it would actually perform.
03-10-07, 10:37 PM
#19
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psss torsen/drifting statement not true...... i wonder what i was doing allday today with my car must have been teleporting side sliding and not "drifting." a good drivier can make most anything drift.. i have an fd diff
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