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Old 10-16-2012, 02:09 PM   #1
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Default CSP Limited Slip Differential choice

The autocross season is just finishing here in the great frozen north of upstate NY. My car is a 90 with a 2003 engine. Currently installed is a 94 differential housing with matching driveshaft and axles along with an RX7 clutch type LSD that feels a little weak. I also have, already on the shelf, a like new Type I torsen. I will be installing a 4.30 gear set so my diff housing will already be apart. My question is, should I rebuild the clutch type LSD or install the torsen? I know about the OS Giken but my short term plan will be to use one of the differentials that I already own. The car is dedicated for autocross use.
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Old 10-16-2012, 02:13 PM   #2
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Rx7 differentials suck. Install the Torsen if you must, but get an OS Giken into the car as soon as you can. It makes a huge difference.
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Old 10-16-2012, 02:38 PM   #3
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FWIW this year’s national champion car in CSP and CSPL was using a stock Torsen. I still think I prefer the OS Giken though. The RX7 diffs I have driven were not near as smooth and predictable.

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Old 10-17-2012, 09:56 AM   #4
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Bob pretty much nailed it. I just helped adjust the sister car OS Geiken. Wasn't to difficult, hopefully the adjustment will get rid of the on throttle push issue. I like the torsen, as long as your setup keeps both rear wheels on the ground always its not a massive step down from a factory setup geiken. No comment on the RX7 diff.
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Old 10-18-2012, 08:22 AM   #5
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Until someone beats Scott Fraiser(CSP National Champion) with a OSG....I would say save your money, use the torsen and spend the $1,600 on driving the car.
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