Have question about electronic speedos
 

Fellas I'm getting down to the fine dteails on the T56 install and now I need speed detection! I believe autometer electronis speedo would be he way to go but has anyone done this? I need details like how to wire the sender... which terminal gets the +12V and are any additional devices required? I'll probably talk to the techs at AMeter but would appreciate hearing from you guys' experiences.
I'm hoping this meter will resemble the OEM of my 67 any other suggestions?
http://hp.autometer.com/products/spo...ch_speedo.html

Thanks in advance, Bill

I may be wrong here but I believe the speed sensor you are referring to is a PM generator (permanent magnet). what it does is generate an AC voltage which is in the form of a sign wave. the module or in your case the speedo recieves this signal & translates it to a square wave via a analog to digital converter. it doesnt matter which is pos or neg. it will work the same each way. just like a wheel speed sensor on an ABS system. of course this is just for a 2 wire sensor. if it a 3 wire then it will be polarity sensitive. (like a 5 volt reference wire, a ground wire, & a signal wire) these are called a hall effect sensor. most speedos work with the 2 wire PM generator type circuit though.
Todd the Tech. <hey, that's kind of catchy>

ooops, almost forgot. the wires for the 2 wire sensor should be twisted in a corkscrew fashion to eliminate the possibility of polluted signal. also keep them at least 6 inches away from any spark plug wires or the like. (EMI is bad)

The Autometer should be fine and have instructions as far as the wiring. A lot of the LS1 hybrid swap people use them. You can also get a box to convert the speed sensor signal to a cable driven one if you want to retain the stock speedo. If I remember right it was $300.00 but that's been awhile ago so I could be wrong. I can dig up their website if your interested.



Cable X is the name of the company and the box is $294.00