Where does the CSL take its speedo reading from?

[Mike R]

Just wondering for future reference, as one of the things I have found is that the standard final drive is just so LOOOOOOOOOONNNGGGGGG, that it really dulls the performance. So was wondering how the speedo would be affected by fitting a 3.9 final drive? For example, if it was in the gearbox, then it would under-read with this diff, but if it went off wheel speed, it would be fine :).

Thanks in advance :).

[_Nathan_]

Ground speed calculated from the 4 wheel speeds via ABS

4.1 on mine and speedo was fine.

[Mike R]

Ground speed calculated from the 4 wheel speeds via ABS

4.1 on mine and speedo was fine.

Thanks Nath :beer:.

[hoshy]

You're in the BMW world now... they'd never do anything so silly as using the box for speed signal.

[shimmy]

Ground speed calculated from the 4 wheel speeds via ABS

4.1 on mine and speedo was fine.

I'm not sure how you know that coz it never moves from Lydney!!!

[_Nathan_]

Mainly cause I got the pin out and CAN info for the ABS unit ;)

New suspension now in the same room as the car, almost got enough parts to put it back together now ;)

[shane@mbtech]

NSR wheel speed sensor.

Undo that and your speedo will not work.