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  #1  
Old 04-08-16, 10:21
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grahamb grahamb is offline
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Rear wheel speed sensors

Where's the best place to fix the rear wheel speed sensors on my FF? Should I fit them Inboard/Outboard? Pros' & Cons

Pics or suggestions please
They're the M8 variety (NPN Barrel Inductive Proximity Sensor, M8 x 1, 2.5 mm Detection Range, 12 → 48 V dc, IP67 )

Last edited by grahamb; 04-08-16 at 10:55.
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Old 04-08-16, 16:17
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wil_ker wil_ker is offline
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I don't think there isa 'best' place. On the OMS I have them picking up on the brake disk bolts.

On the Mini I made trigger wheels and mounted them on the pot-joints. Both worked fine.
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Old 04-08-16, 18:14
No Imagination No Imagination is offline
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Quote:
Originally Posted by grahamb View Post
Where's the best place to fix the rear wheel speed sensors on my FF? Should I fit them Inboard/Outboard? Pros' & Cons

Pics or suggestions please
They're the M8 variety (NPN Barrel Inductive Proximity Sensor, M8 x 1, 2.5 mm Detection Range, 12 → 48 V dc, IP67 )
The 'experts' will say mount them outboard to avoid a small time delay due to driveshaft twist, in other words you get genuine wheel speed.
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Old 04-08-16, 18:39
jouhar jouhar is offline
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This is how I mounted them on the Westfield I had a couple of years ago.

I reckon if you point them at the brake disc bolts, and one is not reading well, your speed will be 25% out.... whereas if you have a 16-tooth trigger wheel and one is not reading, then your speed will only be out by 6%.... then again, I may be talking complete bo11ox.... Best of luck however you decide to do it.



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Old 04-08-16, 19:20
JoeR88 JoeR88 is offline
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Quote:
Originally Posted by No Imagination View Post
The 'experts' will say mount them outboard to avoid a small time delay due to driveshaft twist, in other words you get genuine wheel speed.
Just in case the 0.0001 of a second delay might throw off your results. Then again don't imagine any logging equipment could measure the difference.
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Old 04-08-16, 20:57
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Quote:
Originally Posted by JoeR88 View Post
Just in case the 0.0001 of a second delay might throw off your results. Then again don't imagine any logging equipment could measure the difference.
Indeed. When you have 4 teeth and a you're monitoring at a few hundered Hz at best, I can't see it being an issue. But experts will be experst!
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Old 04-08-16, 22:16
paul martin paul martin is offline
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I had these made for the OMS. Mounted to the rear of the disc on the front.
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Old 04-08-16, 23:41
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Good ideas. I'll look round the paddock at Loton for further inspiration. Trigger wheel looks like a goer.
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Old 05-08-16, 08:47
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The easiest place is the best place to be honest, the inner joint will probably have bolts and you can make a bracket that comes off the gearbox to mount the sensor fairly easily.
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