Tach reading too high

[doubleyellow]

My original Rallye gauge tach is reading about 2 times too high. Set the idle RPM to about 850 (using 30 year old Sun meter) and the dash tach is showing about 1400.

Any suggestions would be appreciated.

 

[Chryco Psycho]

Convert it to modern electronics , the company that makes the kit eludes me right now

 

[Challenger RTA]

Convert it to modern electronics , the company that makes the kit eludes me right now

MOPAR Products

Real Time Engineering

Tachometer Repair Restoration for Chrysler Classic Cars

E-body Rallye Instrument Panel Restoration Service Dash

www.performancecargraphics.com

 

[moparleo]

Also requires calibration after the conversion.

 

[6PKRTSE]

My tach reads high also. At 45 MPH it reads about 3600. It should be around 2400.