GT Tachometer conversion with 10K upm scale, Bosch core, small batch being made Options

[Retroracer]

SO there are some threads floating around which detail the conversion of a stock 914 VDO tachometer to use a modern Bosch drive core. Improved ballistics and more modern internals are the main motivation for this; the VDO cores tend to overshoot as they age.

I modified one to match to a 10,000 upm GT style fascia - sourced from Germany - and fitted it to my car. The core needs to be calibrated to the motor type (4 or 6 cylinders) but once done works with a wide range of inputs (Bosch CDI, MSD, etc) and is a talking point to anyone remotely familiar with the details of racing Porsches. The original 10K tach units appear for sale occasionally - but are fairly pricey. Hence the motivation to make a more accessible solution.

Here is mine completed:



and in the car:



Since completing mine, I have been accumulating a few 914 tach cores - dating from 69 to 73 - and am in the process of stripping and cleaning these in prepraration for building them up as 10K replica units. Once finished, these will have Bosch cores, refreshed needles, 10K fascias sourced from Germany, two L/R indicator lights and a main beam indicator. They will be calibrated for a 6 cylinder engine.

When complete and tested, these will be going up for sale. I need to figure out a reasonable price, but am posting this to gauge interest from 914world folks. Am guessing I can get some attention from the 911 boys over on the bird, if I get no interest here; but I'd rather see these being front and center in a 914!

If you have an interest in purchasing one, or have questions, then PM me and let me know. At this stage I can also calibrate them for different motors - a V8 for instance. I'm only doing a few of these, just so you know.

- Tony