Ideal rear gear for my setup?
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I grenaded my 4.1 torsen at around 220whp, 190lb/ft. But according to my logs I was nowhere near peak power when it blew. Probably more in the 170-180 in first. Leafy did the same with a lot more power. I was on relatively sticky tires on one of the best drag strips on the east coast. So there was a ton of grip. Wheelhop killed it, I doubt it was power.
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The S2000 guys have mods they do to the diffs to handle their big turbo motors. Billet caps, preloaded caps, etc. Search Puddymod.
cap straps
![](https://www.miataturbo.net/attachments/suspension-brakes-drivetrain-49/141420-ideal-rear-gear-my-setup-three_diff_caps_.jpg?dateline=1433960510)
solid crush collar
![](http://www.s2ki.com/s2000/gallery/page__module__images__section__img_ctrl__img__488979__file__med)
plus nicer hardware, cryo, REM, bla bla bla.
cap straps
![](https://www.miataturbo.net/attachments/suspension-brakes-drivetrain-49/141420-ideal-rear-gear-my-setup-three_diff_caps_.jpg?dateline=1433960510)
solid crush collar
plus nicer hardware, cryo, REM, bla bla bla.
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<p>Revisiting this because I think there was false information posted above. The MSM diff is a Torsen, just called something different. Bosch sold the Torsen name so they had to call it the Bosch torque sensing limited-slip rear differential. The rest of the miata line up switched to the TF in 03 but the MSM didn't.</p><p>Which LSD in an MSM [Archive] - MX-5 Miata Forum</p><p>http://forum.miata.net/vb/showthread.php?t=508115</p><p>http://www.s2ki.com/s2000/topic/7755...-differential/</p>