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Well, my first question is why you bought a second tach...

Beyond that, your best bet is to call your local dealership and speak with the parts department. If someone here knew they probably would have responded already.
 

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Discussion Starter #4
It appears that any "tach adapter" will work, after a little research. I bought it for looks and for the shift light. It looks more like the original muscle with a big tach on the dash, not in the dash.
 

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A bit more stealth, Raptors dual stage shift light with the light remoted, controller on kick panel. :D
 

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Discussion Starter #6
Ok, I am at the point where I got the MONSTER MOPAR 5" TACH and a MDS TACH ADAPTER (harness) I have a few people helping me research how to get the monster tach to work on a "modern Challenger"... It has something to do with this:
Most modern muscle cars have single ignition coil and the Challenger has 8 ignition coils??? MDS adapter and all tachometers are made to plug into the single ignition coil??? SO, HOW DO I GET IT TO WORK WITH MULTIPLE IGNITION COILS????
 

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Good luck.

It sounds like you invested some money in your car without doing any research first on how to make it actually work. I wish I could help you - hopefully someone on here will be able to chime in with advice.
 

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You cant get a signal from the ignition coil as it fires each coil twice but you can get a readable signal by tapping off an injector. However in some situations the injector doesnt recieve a signal, such as sudden deceleration so the tach may drop out and then come back.

Why the tach, the car has one already, I could see the need for the light but you can run one of thoes without a second tach.
:icon_biggrin:
 

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2013 Challenger SRT8
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it's kind of cool to look at 2 tach instead of one, like that you have one for each cylinder banks...bwaaaaaaaaaaa!!

or amuse yourself comparing both reading... tons of fun!

:jawdrop:
 

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Discussion Starter #11
Well, I got the tach installed and mounted center dash. It works perfectly! I used a MSD tach adapter and had Hinson Motorsports install it. They did a good job. I do not know how they did it but it works perfectly.
 

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Any pictures of it installed in the car?
 
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