OER IN12293T Tic-Tock Tachometer Features:

• Reproduction of the factory-style Tic-Toc Tachometer used in 1970–1972 Oldsmobile 442, W-30, W-31, Rally 350 & Hurst/Olds
• Combines a functional clock and tachometer in one housing
• Electronic movement design ensures accurate tach response and reliable timekeeping
• Calibrated for use with both points and HEI ignition systems
• Operates within 11.2 V–14.7 V range for stable performance
• Includes factory-correct face graphics and indicator needles for an authentic appearance
• Tach resets to zero each time power is cycled
• Wiring includes 12 V power lead and signal (S) lead from distributor

OER IN12293T Tic-Tock Tachometer Notes:

• Only Compatible with factory GM points or factory HEI ignition systems
• Warning: When using an aftermarket ignition system such as MSD, Accel, or Pertronix, an adapter must be purchased from the ignition manufacturer
• Many aftermarket ignition systems produce over 18 V at the tach lead, while factory GM tachometers are designed to operate between 11.2 V and 14.7 V
• Always use a proper tach adapter to reduce voltage to the correct factory GM range and prevent tachometer damage