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LSDs

Limey

Donation Time
Hi all, I've posted this on the race forum as well.

I'm building an SII Alpine in the UK and for a challenge will be taking it to the Stage 3(4) tune as available in period as much as possible. I'll be using the 1960's list of Rootes mods and trying to replicate every one as close as possible.

One item I'd like to replicate is the limited slip diff. I'll be going to Gripper but I could use your advice.

1) What specs would be close to the LSD available from Rootes at the time . See available list below. (E&F ''old ZF spec''?)
2) What spec would be best for fast road and track days in your opinion?
3) Given that Gripper LSDs don't shock the shafts much by virtue of their design, should I bother with hardened drive shafts? If 'yes' do I have my originals hardened or made from scratch? The reason why I am not automatically including this mod is that it neither adds to the drive feel or period appearance)

Below are the specs that Gripper list on their website:-

A - Tarmac Race 40/65 Ramps 120Nm
B - Road/Trackday 40/65 Ramps 60Nm
C - Gravel 30/60 Ramps 120Nm
D - Gravel 30/60 Ramps less plates low preload 60Nm
E - Race (Old ZF Spec) 45/45 Ramps 120Nm
F - Road (Old ZF Spec) 45/45 Ramps 60Nm
G - Race (Soft Locking/Lightweight) 50/80 Ramps 120Nm
H - Road (Soft Locking/Lightweight) 50/80 Ramps 60Nm
J - Race (Open on over-run) 30/80 Ramps 120Nm
K - Road (Less Plates) 30/80 Ramps 60Nm

Thanks

Oliver
 
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