I just Bought A Auto-Meter RPM Monster Tacho and im having problems putting it in as i know it needs to be connceted to the Ignition coils But in my rx7 series 2 i have twin coils and i don't know what to hook it to do i hook it to both or just one and also on the in structions it tells you that for a 8 cylinder don't cut any loops on the back for a 6 cylinder cut 1 and for a 4 cylinder cut 2 but it doesn't say for a rotory so please if anyone has installed one before please give me an idea of what to do

thanks a heap

wog

 

Search!!!!!
4-cylinder firing pulse for a rotary, connect to the trailing coil negative side, give ignition power and ground to the tach. Works. I am using a pro-comp tach on my 12a. I had to find out all this stuff, and used the search function alot. Try it!

 

you can use either one, will make no difference

 

Hook it to trailing so you'll know if the trailing ignitor or coil ever goes out on you. I doubt you'd feel the power loss, since trailing doesn't really add much.

 

If your not disconnecting the stock tach, it makes no difference

 

True.