Hello,
While we definitely still manufacture an LSD for your application, it’s not what I would recommend. As you’ve described, in auto-x you rotate the car early and do actually want it a little on the loose side. The lock up under braking you get with an LSD will make the car harder to rotate.
For auto-x in a 911, what you really want is a
TBD, torque biasing differential. We no longer make those, but of the two on the market I would strongly recommend the Quaife. The other one, by Wave-Trac has a proprietary gizmo that locks it like a spool under the brakes. They also seem to have more failures than the Quaife.
Regards,
Matt Monson
Guard Transmission llc.