Description

The Speedhut 4" 8K RPM Shift-light Tachometer (R4-TC3-REV) is an essential instrument for drivers seeking accurate and immediate engine speed information. This 4-inch gauge provides a clear and precise reading of your engine’s revolutions per minute (RPM) up to 8,000, allowing you to monitor performance effectively. Its integrated shift light serves as a crucial visual aid, signaling the optimal moment for gear changes, which can lead to improved acceleration and overall driving efficiency. Designed for compatibility with a wide range of gasoline engines utilizing standard spark plug ignition systems, this tachometer is suitable for vehicles with 1 to 12 cylinders. Its robust construction and included mounting hardware ensure a secure and straightforward installation process.

KEY FEATURES AND BENEFITS:

• Precise RPM Monitoring: Accurately displays engine speed up to 8,000 RPM, providing vital information for optimal engine performance.
• Integrated Shift Light: Features intensely bright shift lights that can be calibrated from 1/2 pulse to 6 pulses per revolution, offering clear visual cues for timely gear changes.
• Broad Engine Compatibility: Designed to work seamlessly with any gasoline engine and tach signal over one volt, supporting 1 to 12 cylinder configurations using standard spark plug ignition systems.
• Easy Installation: The included gauge mounting ring and wiring harnesses facilitate a straightforward installation process.
• Enhanced Performance Driving: The shift light functionality allows drivers to maximize their engine’s power and efficiency by shifting at the ideal RPM.
• Durable Construction: Built to withstand the demands of vehicle use, ensuring reliable performance over time.

SPECIFICATIONS:

• Standard or Metric: Standard
• Gauge Type: Tachometer
• Tachometer Signal Type: Standard spark plug ignition systems
• Compatibility: 1-12 cylinder engines
• Range: 0-8,000 RPM
• Size: 4 inches
• Hole Size: 3.95 inches (100mm)
• Internal Shift Light: Yes
• Gauge Mounting Ring: Included
• Ships With:
  • 3 ft Power & Lighting Harness – for LED Lit Gauges and Clocks
  • 8 ft Tachometer Harness – for LED Lit Gauges (1 Wire 2 Pin Connector)

HOW TO USE:

• Mount the Gauge: Secure the 4-inch Speedhut Tachometer in the desired location using the included gauge mounting ring. Ensure the 3.95-inch (100mm) mounting hole is appropriately sized.
• Connect the Power and Lighting Harness: Attach the 3 ft Power & Lighting Harness to the designated power and ground sources in your vehicle, following your vehicle’s wiring diagram and the gauge’s instructions. This harness will also power the LED illumination of the gauge.
• Connect the Tachometer Signal Harness: Connect the 8 ft Tachometer Harness (1 Wire 2 Pin Connector) to the tachometer signal wire from your vehicle’s ignition system (typically from the coil or ECU, depending on your vehicle). Ensure a secure connection.
• Calibrate the Shift Light (if necessary): Depending on your engine type and desired shift points, you may need to calibrate the internal shift light. Refer to the Speedhut instructions for setting the pulses per revolution (1/2 to 6 PPR) to match your engine.
• Verify Functionality: Once all connections are made, start your vehicle and observe the tachometer readings to ensure accurate RPM display. Test the shift light by gradually increasing engine RPM to confirm it activates at the set point.

BENEFITS OF USING THE SPEEDHUT 4" 8K RPM SHIFT-LIGHT TACHOMETER (R4-TC3-REV):

• Improved Engine Performance: By providing precise RPM readings and a clear shift light indicator, you can optimize your gear changes for maximum power output and efficiency.
• Enhanced Driving Experience: Knowing the exact engine speed allows for smoother transitions and better control of your vehicle, especially during performance driving.
• Preventing Engine Damage: Monitoring RPM helps prevent over-revving, which can lead to costly engine damage. The shift light acts as an early warning to shift up before reaching the engine’s limits.
• Easy Integration: Designed for compatibility with a wide range of standard ignition systems, this tachometer is a versatile upgrade for various vehicles.
• Straightforward Installation: The inclusion of necessary mounting hardware and wiring harnesses simplifies the installation process, allowing you to quickly benefit from its features.

FEATURES:

• Clear analog display: With a 0-8,000 RPM range for easy readability of engine speed.
• Bright, internal shift light: Alerts the driver at a pre-set RPM for optimal gear changes.
• Compatibility: Works with 1 to 12 cylinder gasoline engines utilizing standard spark plug ignition systems.
• Works with tach signals over one volt: Ensuring broad application.
• Compact 4-inch gauge size: Fits standard instrument panel openings.
• Requires a 3.95-inch (100mm) diameter mounting hole: For secure installation.
• Spin-lock mounting ring: For easy and stable attachment.
• Includes: An 8 ft tachometer harness with a 1 wire 2 pin connector for signal input, and a 3 ft power and lighting harness for powering the gauge and its illumination.