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Sorting out a tachometer
Benzine - 5/7/13 at 09:08 AM

What's a locost/scrapyard friendly way of rigging up a tachometer? I can't use the one that the donor engine (XUD) used as the flywheel (HDI) has a different number of teeth and the gearbox (Pilot) doesn't have a place to mount a sensor.

I've heard of running them off the alternator but that looks a bit complicated. Some kind of sensor on the crank pulley?

deezee - 5/7/13 at 11:13 AM

Can you take it off your ECU?

[Edited on 5/7/13 by deezee]

[Edited on 5/7/13 by deezee]

Ben_Copeland - 5/7/13 at 11:23 AM

Coil? Coil pack? Ecu? There many ways

MikeRJ - 5/7/13 at 12:24 PM

quote:
Originally posted by Ben_Copeland
Coil? Coil pack? Ecu? There many ways


An old Peugeot turbo diesel has none of these things.

You can buy a converter to adapt a petrol engine tacho to a diesel as long as you alternator has the W terminal (or you are happy taking it apart and connecting a wire to the rectifier to get a single phase output).

You could ecven build a diesel tachometer from scratch.

[Edited on 5/7/13 by MikeRJ]

Benzine - 5/7/13 at 09:17 PM

Thanks for those links, Mike. I've remembered that I have a spare alternator in the garage that's the same as the one I'm using in my MK so i'll have a look inside that and see if it's suitable