Speedhut 3-3/8" 8K RPM Shift-light Tachometer (R3-TC3-REV)
The Speedhut 3-3/8" 8K RPM Shift-light Tachometer (R3-TC3-REV) is a vital instrument for monitoring your engine's revolutions per minute (RPM). Designed for vehicles with standard spark plug ignition systems, this gauge provides accurate and real-time feedback on engine speed, helping you optimize performance and prevent potential damage from over-revving. Its integrated programmable shift light alerts you to the ideal shift points, maximizing acceleration and efficiency. With broad compatibility across 1 to 12 cylinder engines and a convenient 3-3/8 inch size for easy mounting, this tachometer is a practical addition to any vehicle.
KEY FEATURES AND BENEFITS:
Provides accurate readings: Measures engine RPM up to 8,000.
Integrated shift light: Programmable to illuminate at desired RPM levels.
Engine compatibility: Supports 1 to 12 cylinder engines.
Ignition system support: Designed for standard spark plug ignition systems.
Standard size: Fits 3-3/8 inch (84mm) mounting holes.
Gauge mounting ring: Included for secure installation.
Wiring harnesses included: Power, lighting, and tachometer signal harnesses provided.
Gauge Type: Tachometer
Tachometer Signal Type: Standard spark plug ignition systems
Compatibility: 1-12 cylinder engines
Range: 0-8,000 RPM
Size: 3 3/8 inch
Hole Size: 3.3 inches (84mm)
Internal Shift Light: Yes
Gauge Mounting Ring: Included
3 ft Power & Lighting Harness (for LED Lit Gauges and Clocks)
8 ft Tachometer Harness (for LED Lit Gauges – 1 Wire 2 Pin Connector)
Mount the Gauge: Locate a suitable 3.3-inch (84mm) diameter opening in your dashboard or gauge pod. Insert the tachometer into the opening and secure it using the included mounting ring from the back.
Connect the Power and Lighting Harness: Connect the 3 ft Power & Lighting Harness to your vehicle's power source (typically a switched 12V source and ground) and to the gauge's corresponding connector. This harness also controls the gauge's backlighting.
Connect the Tachometer Signal Harness: Connect the 8 ft Tachometer Harness to the appropriate tachometer signal output from your vehicle's ignition system (usually a wire connected to the negative side of the coil or a designated tachometer output). Connect the other end of this harness to the designated connector on the back of the tachometer.
Program the Shift Light (if desired): Follow the manufacturer's instructions (usually included with the gauge) to set the RPM at which you want the internal shift light to activate. This typically involves using buttons or a specific sequence of actions.
Verify Functionality: Start your vehicle and observe the tachometer reading to ensure it is displaying the correct engine RPM. Check that the shift light illuminates at the programmed RPM.
BENEFITS OF USING THE SPEEDHUT 3-3/8" 8K RPM SHIFT-LIGHT TACHOMETER (R3-TC3-REV):
Allows precise engine monitoring to prevent over-revving and potential damage.
Enhances performance by indicating ideal shift points through the integrated light.
Improves fuel efficiency and acceleration with optimized gear shifts.
Broad compatibility ensures usability across a wide range of engine types.
Simple and secure installation with included mounting hardware and pre-wired harnesses.
Real-time Engine Speed Monitoring: Provides immediate and precise feedback on your engine's RPM.
Driver-Programmable Shift Indicator: Allows customization of the optimal shift point for your driving style and vehicle.
Wide Engine Compatibility: Suitable for vehicles with 1 to 12 cylinders.
Designed for Standard Ignition Systems: Ensures compatibility with common gasoline engine setups.
Standard Gauge Size: Fits easily into common aftermarket gauge locations.
Secure Mounting System: The included ring ensures the gauge stays firmly in place.
Pre-wired Harnesses: Simplifies the electrical connections for power, lighting, and RPM signal.
Product identification
- Brand: Speedhut
- Model / MPN: R3-TC3-REV




