I'm currently running a 7" 4x4 3.62 LSD rear diff with circa 400bhp.

The car is a Westfield and weighs about 500kg

I'm worried that I will strip the teeth soon when doing hard launches on glued tracks so I'm wondering what the options are?

The car will be over 500bhp for next year with a fair amount of torque too.

Do I use the 7" casing and uprate the LSD and gears or do I use a 7.5" diff casing which is heavier and fit an aftermarket LSD and stronger gears in that?

Are stronger motorsport gearsets avaialable for the 7 or 7.5" diff?

What type of LSD is the best to use for drag / road use?

Quaife
Grippa
ZF

I can only use a 7" or 7.5" diff in my chasis