Speedhut 4″ 12K RPM Shift-light Tachometer (R4-TC5-REV)

The Speedhut 4″ 12K RPM Shift-light Tachometer (R4-TC5-REV) is an essential instrument for drivers seeking precise engine speed monitoring and optimized performance. This 4-inch gauge is designed to seamlessly integrate into vehicles with standard spark plug ignition systems and offers compatibility across a wide range of engines, from 1 to 12 cylinders. Its primary function is to provide real-time Revolutions Per Minute (RPM) readings up to 12,000, allowing drivers to make informed decisions about gear changes and engine operation. The inclusion of an intensely bright internal shift light further enhances performance driving by providing a clear visual cue for optimal shift points, helping to maximize the engine’s power output and efficiency. Built with a focus on reliability and ease of use, this tachometer is a valuable tool for anyone looking to closely monitor their engine’s performance.

KEY FEATURES AND BENEFITS:

• Precise RPM Monitoring: Provides accurate real-time readings of engine speed up to 12,000 RPM.
• Integrated Shift Light: Features a bright internal shift light that can be calibrated from 1/2 pulse to 6 pulses per revolution, offering visual cues for optimal gear changes.
• Broad Compatibility: Designed to work with any gasoline engine utilizing a standard spark plug ignition system and tach signal over one volt, supporting 1 to 12 cylinder configurations.
• Easy Installation: The gauge is designed for straightforward installation.
• Included Mounting Hardware: Comes with a gauge mounting ring for secure and seamless integration into your dashboard.
• Wiring Harnesses Included: Ships with all necessary wiring, including an 8 ft tachometer harness and a 3 ft power & lighting harness.
• Enhanced Performance: Helps drivers optimize engine power and responsiveness by providing crucial RPM and shift point information.
• Rugged Construction: Built to withstand demanding conditions, ensuring reliability and longevity.

SPECIFICATIONS:

• Gauge Type: Tachometer
• Signal Type: Standard spark plug ignition systems
• Compatibility: 1-12 cylinder
• Range: 0-12,000 RPM
• Size: 4 inch
• Hole Size: 3.95 inches (100mm)
• Internal Shift Light: Yes
• Included: 8 ft Tachometer Harness (1 Wire 2 Pin Connector), 3 ft Power & Lighting Harness

HOW TO USE:

1. Mount the Gauge: Secure the 4″ Speedhut tachometer in a 3.95″ (100mm) diameter hole in your desired location using the included mounting ring.
2. Connect the Power and Lighting Harness: Attach the 3 ft power & lighting harness to a suitable power source in your vehicle, ensuring proper polarity. This harness will also power the LED illumination of the gauge.
3. Connect the Tachometer Signal Harness: Connect the 8 ft tachometer harness to the tachometer signal output from your vehicle’s ignition system. This is typically a wire connected to the negative side of the coil on older vehicles or a designated tach output on modern systems.
4. Calibrate the Shift Light (if needed): The internal shift light can be calibrated based on the pulses per revolution of your engine (from 1/2 pulse to 6 pulses per rev). Refer to your vehicle’s service manual or Speedhut’s instructions for the correct setting for your engine.
5. Observe RPM Readings: Once properly connected, the tachometer will display the engine’s current RPM in real-time as the engine is running.
6. Utilize the Shift Light: As the engine RPM approaches your pre-set shift point, the internal shift light will illuminate, indicating the optimal time to change gears for maximum performance.

BENEFITS OF USING THE SPEEDHUT 4″ 12K RPM SHIFT-LIGHT TACHOMETER (R4-TC5-REV):

• Accurate Engine Monitoring: Enables precise RPM tracking to assess engine load and maintain safe operating ranges.
• Optimal Gear Changes: The shift light improves timing for gear shifts, enhancing acceleration and overall performance.
• Over-Rev Protection: Monitoring RPM helps prevent engine damage caused by exceeding safe revolutions.
• Broad Vehicle Compatibility: Suited for a wide array of engines, from single-cylinder setups to 12-cylinder performance builds.
• Effortless Installation: Pre-included mounting and wiring components simplify integration into most dashboards.

FEATURES:

• Displays engine speed in Revolutions Per Minute (RPM) up to 12,000.
• Equipped with a high-intensity internal light to signal optimal shift points.
• Designed for seamless operation with standard spark plug ignition systems.
• Compatible with engines having 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12 cylinders.
• Features a 4-inch diameter gauge face for clear visibility.
• Requires a 3.95-inch (100mm) opening for mounting.
• Includes a bezel or ring for a finished look after installation.
• Comes with an 8-foot wiring harness specifically for the tachometer signal on LED-lit gauges.
• Includes a 3-foot wiring harness for power and illumination of LED-lit gauges and clocks.
• Allows for calibration of the shift light based on engine pulse rate.