I have a 1992 and I was wondering which tach do I need to purchase that would plug into the stock wiring? I think I'd like a 4k rpm tach.

 

The part number for a 2-1/16th diesel tach from Isspro is R8501 which is a 4K and the sensor kit is a R8912-92

 

Thanks for the part numbers.

 

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Also the R5503 is the ev style 2 1/16th thats 4k rpm. The R5504 is a 5k tach. The R8912-92 is a wire kit, not a sensor. With the EV series you don't need to use there wire kit because the resistor that is in the wire kit is not needed. I am pretty sure the R8 series needs the resistor. ( NOTE ) the R8501 is a 3 thousand rpm tach. The 4 thousand model in that series is the R8503.








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I believe on the 1992 and newer dodges all you need is the R8912-92 because you maintain the factory magnet. But I you do a 4k tach you can do a 8503tach and 8906 sensor kit which has the magnets and everything. The 5503 you need a kit for the sensor as well

 

All My answers are in red in the above quote.














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So the list below is all that I'd need?

R8503 4k Tachometer
R8912-92 Wire harness for 92 dodge

 

Or the R5503 and no wire kit. Your choice.

 

My truck 91.5 intercooled did not have the plug under the dash, just one of thoses things most had them but after research alot of the LE d250's did not have the plug. I use an ISSPRO 3 1/2 inch with the cup mounted to the dash and I needed the magnets and the wiring to make the tach work.I'll post a pick of all guages.