Hello,

I am building a xr4i sprintex and want to use a cosworth tacho because of the boost meter. The tuner can make change the 6 pulse to a 4 pulse to work with the cosworth tacho.

But are these clusters interchangable? without changing the connector. I donīt wont to short circuit anything.
Also does the tacho react to a negative or positive pulse? Also kind of curious what the red wire does.


here some pics: