Quote:
Originally Posted by john_cramer
1. 1965-1968 SWB Tachs. These may have VDO number 333.230/041/002, according to VDO, "this is a old version Tachometer with 24 Volt Square Wave signal from Ignition KL.1."
KL is German for "klemme" or contact, and #1 is the points contact, so this is a 24-volt square wave signal that comes off the coil. In another thread, Pelican 914GT tested it and found that the coil output was way more than 24 volts, but the spec came from VDO. Tach Thread These also say "12V 14000 Imp." which I think is the impedance value to make them work? I think all 914 tachs fit into this category as well. |
If anyone wants to use a CDI on a car with of these tachs, an MSD tach adapter box will alter the input from the CD box to work. This is of course in lieu of the silver Porsche part, which can be hard to find, IIRC.