changing speed sensor for Hall Effect unit

[ed_crouch]

Anyone know if this has been done? I'm going MS3X and I want to ditch the silly VR conditioner/splitter box behind the dash. I guess the sensor is a standard-ish screw in type?

Has anyone swapped the two wire VR sensor out for a 3 wire Hall Effect jobbie?

If not I'll probably do that and post up the result...

I did read that the speedo will read the unmodified VR signal? Gotta say that surprises me...

Having run the speedo up on the bench it comes out at 40,500 pulses per mile, which means I think the reluctor wheel has about 50 teeth on it?

Ta. Ed.
P.S. I realise this is rather a specific query!

[ed_crouch]

Oh and if anyone needs/wants a spare black box splitter/discombobulator I'm going to reverse engineer it and draw the schematic. Its pretty simple in there so I'm sure the unit could be built for about twenty quid...

[TVR Stef]

Yes I've done it as part of my GEMS conversion and it's been working fine. The one I used came from RS stock number 700-1460

[Sardonicus]

Was using a S/H Bernstein hall sensor years back with the self check LED on top was working great but the wiring got vermin attacked the one year the car stayed outside at my old address

[ed_crouch]

Thank you, chaps. For now I will probably stick with the VR, because project scope creep is a thing in my house... But, that VR sensor is going ultimately. We'll file that one under technology insertion...

[blitzracing]

The spitter box is based around these circuits- but has a secondary chip that produces the clock pulses when the frequency reaches what ever pulses per second 3 mph is.

[ed_crouch]

Thank you for these - useful!

It sounds as though the splitter has some circuitry to positively prevent the odometer clocking up spurious miles when input voltages go floaty when the ignition is off?

Well, I'll keep the splitter I think.