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Showing content with the highest reputation on 10/15/2019 in Posts

  1. 1 point
    A real check for a mechanical diff is to lift the rear, and rotate a wheel. If the other wheel rotates too, but in the opposite direction, then it has a mechanical locking diff. I added a Guards 60/40 LSD to my 986S racecar. There are certain turns at certain tracks with poor rear grip (Homestead Miami Speedway for example) where the LSD kicks in a lot. The Boxster race cars in the Grand Am Sports Car Challenge ST Class are also using this same diff. If anyone else is thinking of adding a diff for track use, the Grand Am guys tested both the 80/20 and the 60/40. The 80/20 caused excessive understeer. The 60/40 also makes it biased to understeer, but it can be dialed out with shocks, springs and sway bar settings. If anyone is thinking about a diff for spirited street driving, the torque biasing diffs are good.
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