Thursday, February 9, 2017

Karmann Ghia EV Conversion - Speed sensor problem / New gauges

I have come to the conclusion that I will not be able to get the WarP motor speed sensor kit to be compatible with the Synkromotive controller. There is a glitch that arbitrarily limits motor RPM to approximately 3600. The sensor seems to display RPM accurately.
Since I could not fix this problem, I decided to by a 52mm tachometer which will fit in the dashboard in place of the original clock. This will not prevent over-revving the motor but should give satisfactory feedback to the driver to avoid damage.

Tach from amazon

I installed it in the hole for the clock on the dash and it works nicely.

I ended up not liking the appearance of the amazon tach. Instead I bought matching gauges for RPM and Voltage from VDO. I like that the gauges match and they look similar to the original equipment. VDO makes the original gauges for the car. The other nice thing is the gauge light comes on with the headlights, not all the time, and it is attached to the main dimmer. It all works together nicely.




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