I've just finished rebuilding four speedometers for Saab, and, surprisingly enough, for Volkswagen owners [!]. All these instruments were built by VDO, of course, and while they have similar "innards", there are important differences. So I have to use different techniques on each one.
This one [above] is from a Saab Sonett III. Just visible is the SAAB logo, right under the trip register.
This one is from a "Type 3" VW. You know, the Squareback and Fastback models.
This VDO unit is from a VW Beetle, when VW was trying to convince buyers the car would go 90 mph. The first USA Beetle speedos only were calibrated to 80.
This one is from a Porsche 914. These VW-Porsche speedos caused me to design and build a whole NEW raft of special wee tools, but that's the only way to do it right. I also do a speed vs mph calibration on every speedometer and give the owner a complete rebuild data sheet.
So why am I doing VW-Porsche speedometers? Well, like a whole lot of people over 60, I have owned a number of those cars. Lessee....hmmm....3 Beetles, a Westphalia bus and a '61 Super 90 Porsche coupe. Quite a number of Euro cars of the 1950's, 60's and 70's used the VDO instruments and I figured VDO didn't reinvent the wheel for every manufacturer they sold instruments to. Once I got into the speedos a while back, my suspicions were confirmed. See--I can have even more fun with speedometers now--HA!
City Car Design
6 years ago