The Salisbury diff is the best track diff in my opinion, it can be reconditioned and you can adjust the slip. However, the Quaife diff is more driver friendly! The Salisbury will give you big arms quickly and can be exhausting to drive.
If this is for the road, then give it a miss unless it is only for the occasional weekend fun drive. For the road, go with a cross pin diff (no driving difference other than more reliable).
The Quaife diff is easier to live with, but I would still not recommend it for everyday use.
LSD’s are hard on your steering rack, CV’s and gearbox for tight turns at low speed and remember with plate type diff’s that some oils can cause additional slip issues.
I think for the road, some careful suspension setting will address most of your slip issues without the expense and loss of driver comfort that an LSD will give you.
To answer your question regarding performance, I think it would be fair to say that the Salisbury will give better track performance, but in saying that, I should qualify it with, only with an experienced driver. I think the Quaife is better suited to an average driver simply because it is more forgiving. Quite often, I will hear people saying the Quaife diff is better and this is based on their results but, if you can master the Salisbury it will, in my view, deliver better results – both in times and muscle definition!
