New 420r with Titan LSD

[theslowman]

Hi,

I have just got my self-built 420r on the road and as expected the LSD is noisy - clattery when not on the throttle and a bit of a whine at speed.

It has done about 150 miles and I have just performed the LSD load check as specified on this site and have got a reading of about 55 ft lbs before it breaks away.

This is a good bit more than the 40 ft lbs stated on the guide to be satisfactory, is this a case of the more the merrier or can you have too high a reading ?

TIA

P.

 

[aerobod - near CYYC]

They tend to be built with a preload a bit higher than spec to allow break-in relaxation. Also, it should be measured as a dynamic torque, so not the torque it initially breaks away at, but the torque to sustain movement against the preload.

[theslowman]

Ah, that makes sense, next time I am playing about with it I will see if I can measure the sustained movement torque.

Thanks

P

[Paul N]

Just bought a factory built 420R sounds same as you describe, not done any checks but just over 200 miles in

[ScottR400D]

James, you're quite right but I'm pretty sure the settings advised by CC and the main LSD supplier are simple initial break figures. That's how it was demo'd to me at the factory. 

The 55 sounds high but I would expect it to fall to 40 or so quite quickly. 

[GulfSeven]

I checked the preload on my 310R after nearly 2 years and it was 42 lb.ft.

https://www.caterhamlotus7.club/comment/2380991#comment-2380991