Speedhut 3-3/8″ 6K RPM Shift-light Diesel Tachometer (R3-TC7-REV)

The Speedhut 3-3/8″ 6K RPM Shift-light Diesel Tachometer (R3-TC7-REV) is engineered for precise RPM monitoring in diesel engines. With a measurement range of up to 6,000 RPM, it delivers accurate and real-time feedback essential for effective engine management. Designed specifically to interpret Hertz-based signals, this tachometer ensures compatibility with diesel engine systems. The integrated shift light provides a visual cue for optimal gear shifting, helping to enhance fuel efficiency and reduce engine strain. Its standard 3-3/8 inch (85mm) size fits common dashboard openings, making installation straightforward. This unit includes both a 3 ft power and lighting harness and an 8 ft Hertz tachometer signal harness, enabling seamless integration into your vehicle’s electrical system.

KEY FEATURES AND BENEFITS:

• Accurate Diesel RPM Monitoring: Displays real-time engine speed up to 6,000 RPM, crucial for performance and maintenance.
• Integrated Shift Light: Alerts the driver to optimal shift points, promoting better fuel efficiency and engine longevity.
• Diesel Engine Compatibility: Reads Hertz-based signals from diesel engine control systems for reliable operation.
• Standard Gauge Size: 3-3/8 inch (85mm) diameter fits many dashboard configurations with ease.
• Complete Wiring Kit: Includes 3 ft power & lighting harness and 8 ft Hertz signal harness for simple and secure installation.

SPECIFICATIONS:

• Standard or Metric: Standard
• Gauge Type: Tachometer
• Tachometer Signal Type: Diesel (Hertz)
• Range: 0 – 6,000 RPM
• Size: 3 3/8 inch (85mm)
• Hole Size: 3.33 inches (85mm)
• Internal Shift Light: Yes
• Ships With:
  • 3 ft Power & Lighting Harness – for LED Lit Gauges and Clocks
  • 8 ft Htz Tachometer Harness (LED Lit)

HOW TO USE:

1. Preparation: Turn off the vehicle and disconnect the battery. Select a mounting location with a 3.33-inch (85mm) diameter opening.
2. Mounting the Gauge: Insert the tachometer into the hole and secure it with mounting hardware.
3. Wiring Connections (Power & Lighting): Connect the 3 ft harness to a 12V ignition-switched source, ground, and optionally the lighting circuit.
4. Wiring Connections (Tachometer Signal): Connect the 8 ft Hertz harness to the RPM signal output wire on your diesel engine’s control unit.
5. Shift Light Adjustment: If available, set the RPM threshold for the shift light using the dial or button on the gauge.
6. Testing: Reconnect the battery, start the engine, and confirm accurate RPM readings and shift light function.
7. Final Adjustments: Ensure secure mounting and neatly route all wiring to prevent interference or damage.

BENEFITS OF USING THE SPEEDHUT 3-3/8″ 6K RPM SHIFT-LIGHT DIESEL TACHOMETER (R3-TC7-REV):

• Provides accurate RPM feedback for better engine monitoring and control.
• Helps optimize gear shifts with a built-in shift light, improving fuel efficiency.
• Supports diesel applications where factory RPM displays may be lacking.
• Offers simple installation with standard sizing and included wiring harnesses.
• Improves situational awareness while driving and helps prevent engine over-revving.

FEATURES:

• Provides precise monitoring of diesel engine RPM up to 6,000.
• Equipped with an internal shift light to signal optimal gear change points.
• Designed specifically to read Hertz-based RPM signals from diesel engines.
• Fits standard 3-3/8 inch (85mm) dashboard openings for easy integration.
• Includes a dedicated 8 ft Hertz tachometer harness for reliable signal connection.
• Comes with a 3 ft power and lighting harness for straightforward electrical hookup.
• Offers a clear and easily readable display for instant RPM information.