Steve,
It's my understanding the OEM rheostat is 5 Ohms.
How difficult is it to reprogram the dimmer to use a different value of rheostat or potentiometer? Do you just re-calibrate it or does the program need to be re-flashed. Since it comes pre-programmed (or pre-calibrated) for a Porsche 6 Ohm rheostat, you could always simply buy a 6 Ohm rheostat from someone like Digikey, although they're not cheap ($33). This one would work fine:
http://www.digikey.com/product...0E/RHS6R0E-ND/824070
If you'd rather use a potentiometer, as they're typically less expensive than a rheostat, the biggest challenge is finding one that fits nicely in the hole in the dash left by the OEM rheostat. I've used this one and it's great but you'd have to reprogram the dimmer because you'll never find an off-the-shelf 6 Ohm pot:
http://www.digikey.com/product...3/A105861-ND/2364186
Digikey sells lots of knobs that would work with either a rheostat or a potentiometer but the anodized billet ones made by Kilo International are particularly nice (cheap too!):
http://www.digikey.com/product...=0&fid=0&pageSize=25
I'm really looking forward to hearing how this works out!
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