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Classic Instruments SN74Z

Signal Converter Universal

Classic Instruments SN74Z

087-SN74Z

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Estimated ship date 12/18/17 if Ordered Today
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Classic Instruments SN74Z Signal Converter Universal $121.00
Signal Converter
  • Universal
  • 8,000 or 16,000 ppm

  • Classic Instruments SN74Z Details

    Universal

    Converts VSS/ECM speed signals.

    The SN74Z has the following features when used as a Speedometer interface.
    Input Source Options:
  • Three wire pulse signal generator input source
  • Built-in Vehicle Speed Sensor (VSS) input source
  • Most Tremec transmissions
  • Later model 700R4's
  • Typically a sine wave signal
  • Two wire pulse signal generator input source
  • Classic Instruments SN96 or SN95
  • Typically a sine wave signal
  • One wire ECM signals input source
  • Typically a 5 volt square wave

    Output: The output can be selectable between either 8000 pulse per mile or 16000 pulse per mile
  • Outputs a 12V square wave, 50% duty cycle
  • 8000 pulse per mile cruise control output

    Additional Benefits: Three different calibration options
  • Instant: drive 30 MPH and press the calibration button
  • Real-Time: press and the hold the calibration button to match the speedometer reading to the actual vehicle speed
  • Marked Mile: Drive a measured mile to calibrate the speedometer
  • Input signal can range from 2000-200,000 pulses per mile
  • State of the art signal averaging software that ensures smooth pointer operation, even in fluctuating signal conditions.
  • Noise-reducing, filtered power output for powered speedometer signal generators

    The SN74Z has the following features when used as a Tachometer interface.
    Input Source Options:
  • High Voltage Coil signal input source
  • .5-6 pulses per revolution (1-12 cylinder engine)
  • Typically the negative side of an ignition coil
  • 5-12V Square Wave signal input source
  • .5-6 pulses per revolution (1-12 cylinder engine)
  • 20%-50% duty cycle
  • Typically from an electronic ignition box or computer
  • Inductive Gear tooth sensor input source
  • Typically used in diesel applications where there is not an ignition system
  • The sensor can be mounted to the engine near the flywheel to sense the gear teeth as they rotate by
  • Can be used with 32-510 tooth flywheels, 32-510 pulses per revolution

    Output:
  • Signal output
  • 12V square wave, 50% duty cycle
  • 2, 3, or 4 pulses per revolution (4, 6, or 8 cylinder)
  • 3 preset flywheel tooth settings
  • 148 tooth - Chevy Duramax
  • 152 tooth - 5.9L Cummins
  • 155 tooth - 7.3L Ford Powerstroke

  • Specifications:

    Manufacturer's Part Number:
    SN74Z

    Classic Instruments Speedometer Sending Units have superior coil resistance with fittings that connect directly to most metric, GM, Ford and Chrysler transmissions. These speed sensors are constructed from the highest quality materials for maximum reliablility.

    Features:
  • Compatible with a Variety of Transmissions
  • Made from High Quality Materials
  • Delivers a Clean, Sharp Pulse

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