VR Pulses from Speed Sensor

[Numptysnumnuts]

Can anyone tell me how many pulses you get per mile from the VR sensor in the gearbox. Trying to see if a VR - Hall converter board will work on this

[James5]

Can you not use an ABS ring on the D/shaft and some clio 16v abs hubs (later valver) as they will have sensors holes and then you just need to wire in the sensor itself.

Ref your question sorry no idea

What you wanting this for out of interest??

[Tutuur]

could imagine a jc5 non speedo gearbox or 02m conversion.

it can be done, maybe Scoff can chime in. iirc het made a sort of abs ring with the same trigger pattern as the gearbox has...

[Numptysnumnuts]

Digital speedo is the reason.

Yes I have read posts about using Clio bits and piece but why change something and add something when the device is already present on the car and its only issue is its in the wrong format. Whilst my vehicle is by no means close to OE standard, adding more none standard parts whilst giving slightly more flexibility adds the problem of keeping track of all these parts should I ever chose to sell the vehicle on. This is only my view and something I am gradually learning as I find more and more bits being non standard.

Yes I am looking at making the entire dash digital but that's my preference.

The device I am looking at is about the size of a fifty pence piece and utilises the signal cables plus earth from the VR sensor and outputs a Hall signal which most digital speedo's use. The only issue I have is not knowing how many pulses it pumps out per mile / hour. This info is needed to know

A) if the signal can be converted
B) which pin to use for signal out

[Scoff]

From memory its about 12 teeth per revolution, so you could use that as a base figure then tweek it to calibrate it against your satnav or something.

[Woznaldo]

Hopefully this will help. Not the best picture but I think 12 windows seem about right?

http://i196.photobucket.com/albums/aa40/woznaldo/JB3ElecSpeedoDrive_zps9a617fe0.jpg

[Os8472]

From memory its about 12 teeth per revolution, so you could use that as a base figure then tweek it to calibrate it against your satnav or something.

:agree: exactly right, I've got a gearbox in bits and have the trigger wheel sat to one side so when I next pull the engine and box I can find a space for it as I'm using a JC5 box.

I'm toying with the idea of fitting it out the output shaft of the diff on the drivers and then making bracket to mount the OE speed sensor.

I'm gunna have the car on a ramp sometime at the end of the month to sort the tracking so ill have a proper nose around then and use a spare gearbox to dummy up.

[Woznaldo]

Olly, can you post up a pic of the Trigger Wheel so we can see what it looks like in the flesh so to speak?

[Matt Cole]

I'm wanting to use the oe speedo and sensor. Need to know how to get it to work;)

[Matt Cole]

Any one?

[Matt Cole]

Bueler, bueler, ...........bueler:crap:

[Woznaldo]

From memory its about 12 teeth per revolution, so you could use that as a base figure then tweek it to calibrate it against your satnav or something.

Like Scoff has said, the trigger wheel on the Diff has 12 teeth, so you could weld some toothed ring to the inner part of the Rh Driveshaft together with a bracket to hold the Mag Pickup?

[James5]

Like Scoff has said, the trigger wheel on the Diff has 12 teeth, so you could weld some toothed ring to the inner part of the Rh Driveshaft together with a bracket to hold the Mag Pickup?


Scoff gave me a link sometime back to what he had done on a clio and it was as Woz has described unfortunatly I can't find the link :crap:

[Lewis]

Scoff gave me a link sometime back to what he had done on a clio and it was as Woz has described unfortunatly I can't find the link :crap:

Found in Scoff's files.

http://www.rtoc.org/files/Technical%20Files/Scoff/Jobs/Tom%20Clio%20172%20Supercharged,%20gearbox%20conve rsion/Speed_sensing.JPG

[James5]

Found in Scoff's files.

http://www.rtoc.org/files/Technical%20Files/Scoff/Jobs/Tom%20Clio%20172%20Supercharged,%20gearbox%20conve rsion/Speed_sensing.JPG


:agree:

[Tutuur]

Have to make something along those lines too. I had welded some m10 nuts on the inner cv (vw) but turns out the cv is mounted excentric a bit so after the first 100m of testing wrecked a sensor.

I wonder if any vr sensor would work as the renault sensor is quite unhandy to fit onto a homemade bracket. I guess it would as voltage increases with number of pulses so think the system is not voltage dependant....

[Os8472]

Standard GTT speedo ring gear

http://i29.photobucket.com/albums/c255/oli_84/9570BBC1-7DA6-40F8-B469-16A446E5AE33_zpsqnhzt0kx.jpg (http://s29.photobucket.com/user/oli_84/media/9570BBC1-7DA6-40F8-B469-16A446E5AE33_zpsqnhzt0kx.jpg.html)

[Matt Cole]

Ok thanks chaps. Would magnets glued on be an option?

[Tutuur]

Only metal is fine

[Matt Cole]

Ok. Anyone got the dimensions of the gt diff so I can make a plate to mount the bits on?

[Tutuur]

Dimensions don't matter. You just need 12 pulses/rev

[Matt Cole]

Dimensions don't matter. You just need 12 pulses/rev

Would the distance between each bit of metal not affect the calibration?

[Tutuur]

Just keep them evenly spaced and you'll be fine