VR sensor
Turbo Mini Forums

What does vr stand for? MS recommends a VR sensor. Is this the same as a hall effect sensor? And what's the best one people have found to use for electronic ignition using MS as the power source?

-James

VR is variable reluctance or something similar, most magnetic crank sensors off modern cars are one of these, except super modern stuff which are digital. A commonly used one is from a Ford, and can be fitted using a bracket, see link http://www.turbominis.co.uk/forums/index.php?p=vt&tid=201632

VR is variable reluctance and is VERY different to hall effect or optical.

In the UK, VR sensors were fitted to many cars, especially Ford, so easy to obtain in our scrapyards and only about £10 (GBP) new.

They specifically "read" multi-toothed wheels, ie, 36/1 whereas hall or optical do single teeth or slots.

Schrödinger's cat - so which one am I ???

although you can get hall switches that will work on toothed wheels,

personally i like hall switches, less prone to inerferance, and give a a square wave output.

So i can grab one when I get my coil pack and just do up a bracket to fit it then. Can I use one of the backplate bolts that are available, or even the alternator bracket on the block to hold down the sensor? What year fords should I stay away from? 2000 and older is what I should look for, or...

-James

Your mounting bracket will need to be unique to the way you do the 36:1 wheel, mine is different to most because I wanted the sensor at the back of the engine.

Have a search, there are many photos on here.

Schrödinger's cat - so which one am I ???

James.

This is the SC Components bracket with a Ford sensor and 36/1 wheel on my van.

But there are plenty of DIY ways of making up a bracket. Just need to do a search.

Richard.

Attachments:

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Minivanless, but reluctantly happy living with the decision. There'll be another one day.
http://www.youtube.com/profile?user=minimadmotorman#p/u

The SC bracket is for a sensor on the back of the crank though, isn't it? That's where the MED trigger is, which is the kit I think I'm going to use...

-James