Thread: Pulse generator

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Have you ever used a pulse generator when converting to an electronic speedometer? I've always used mechanical with the cable, but I'm using a Classic Instruments vintage looking electrical speedo in my t bucket. Apparently, this gizmo converts a pulse from my turbo 400 via wire to the gauge to establish MPH. Do these things actually work?

Yes they do work. I have used them on 3 different VDO speedometers. Still have one on my 46 coupe that's been on it for over 20 years.

FWIW - You'll like the electronic speedo. I usually take a GPS unit out on the road to calibrate one. Now there is an app for a smart phone that provides a GPS speedo. Look for one. It helps to get it just right.

On my newest project, I skipped the trans drive speedo altogether and went with a GPS driven unit. No cable to the trans and no calibration. I'm anxious to see how well it works.

Thanks, I've heard about those GPS units. If this pulse generator doesn't do the job, I'll try the GPS unit.

I went with the GPS speedo some 6 or 7 years ago. LOVE IT!

The only drawback I've found is when you let her sit for weeks / months and then when you want to go for a ride - the speedo hasn't found the satellites and won't register for a bit. But then it mysteriously starts working again. And when going thru tunnels, you may lose signals.

Originally Posted by 34_40

And when going thru tunnels, you may lose signals.

...and when going under train tracks in Chicago...

And when you come out from under it takes a while to reconnect with the satellite.
You keep going 'round and 'round in ever increasing circles.
Extremely frustrating...and people toot and wave at you...but they don't use their whole hand to wave...

L O S T = Lots Of Silly Tourists.

If you type type in speedometer transducer to a search engine you come up with a lot more options.

I've got two vehicles with electronic speedometers now and love them, especially when it comes time to calibrate them.

I actually started using the transducers years ago when you couldn't find aftermarket cruise controls that didn't require a VSS (vehicle speed sensor) or hanging those damn magnets on the drive shaft.

Never had a problem with the transducers on the half dozen or so vehicles I've installed them on.


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Damn, Mike P, you were up at 3am your time on the computer.....I don't have a pulse that early in the morning.

Old age sucks. Anymore I'm waking up about the time I used to come rolling in


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