LSD from open on track

[cat7]

I have a 325i track car which is in the process of having money thrown at it in time for spring. Its having everything from full bushes, short shift, e36 rack, cage, suspension etc etc

The obvious next step is to swap the standard open diff for a lsd for those tighter corners. I believe the standard diff is a 25% locking diff, will this reletively small % of lock be noticeable and worth all the cost and effort of replacing the open diff or.....will it be a waste of time...anyone done this?

[Lordschleife]

I think its worthwhile, I put an LSD on my 325i before taking it to the ring. With the open diff on my 318is its quite easy to spinn up a wheel, so even easier with the torque of the 325

[Eddy]

Is this gonna be a circuit/time car or a driftcar? if it was mine ,I whould weld the diff....

[astondg]

LSD would be better for a circuit car. Welded might work ok for drifting and rally events, although even rally events might benefit from a good LSD because a welded diff is going to give a lot of understeer. It will even understeer out of corners if you don't have enough power to overcome the traction, which my 323i can't really do on dry bitumen with an LSD. I know you can send it sideways with a clutch kick/handbrake/etc. but to keep it going and to get the car to go forward as well as sideways you really need the power on and the wheels spinning.

My LSD seems to work very well and I personally wouldn't have a track car without one. Like I said on a dry bitumen circuit there is no such thing as wheelspin in my 323i with an LSD no matter how aggresive I am with the throttle (it will just understeer if I am too hard with it, the rear won't break traction).

Aston