Speedhut 2-5/8″ AEM Air/Fuel 8.5-18 Gauge w/ Warning (R25-WB3-REV)

The Speedhut 2-5/8″ AEM Air/Fuel 8.5-18 Gauge w/ Warning (R25-WB3-REV) is an essential instrument for monitoring and optimizing your engine’s combustion. This gauge provides precise, real-time air-fuel ratio (AFR) readings, crucial for performance tuning, diagnostics, and ensuring engine health. Designed for seamless integration with AEM inline controller systems, this wideband gauge offers a clear visual display of AFR values ranging from 8.5 to 18. Its 2-5/8 inch (66mm) size ensures it fits comfortably in most standard gauge pods or dashboard openings (2.67″ or 68mm). The integrated warning light provides an immediate visual alert if your engine’s AFR falls outside of a user-defined safe zone, helping to prevent potential damage and allowing for timely adjustments. This gauge ships with all the necessary wiring harnesses for a straightforward installation, making it a valuable addition for enthusiasts and professionals alike.

KEY FEATURES AND BENEFITS:

• Accurate Wideband Readings: Provides precise air-fuel ratio measurements across a wide range (8.5-18), essential for effective engine tuning and monitoring.
• AEM Inline Compatibility: Specifically designed to work with AEM inline wideband oxygen sensor controllers, ensuring reliable and accurate data transmission.
• Integrated Warning Light: Features a built-in warning system that alerts the user to potentially harmful lean or rich AFR conditions, safeguarding the engine.
• Standard Sizing: The 2-5/8 inch (66mm) gauge diameter fits common aftermarket gauge mounting solutions.
• Easy Installation: Ships with comprehensive wiring harnesses, simplifying the connection process for power, lighting, and signal input.
• Clear Visual Display: Offers an easy-to-read display of the real-time air-fuel ratio.

SPECIFICATIONS:

• Gauge Type: Air/Fuel Gauge
• Gauge Subtype: Air/Fuel Wideband Gauge
• Controller Compatibility: AEM Inline
• Range: 8.5-18
• Size: 2 5/8 inch
• Standard or Metric: Standard
• Hole Size: 2.67 inches (68mm)
• Warning Light: Yes
• Input: 0.5 volts to 4.5 volts
• Ships With:
• 3 ft Power & Lighting Harness – for LED Lit Gauges and Clocks
• AF/WB Throttle Position Harness (LED Lite Gauges)
• 8 ft Tachometer Harness – for LED Lit Gauges (1 Wire 2 Pin Connector)

HOW TO USE:

1. Mount the Gauge: Securely install the Speedhut Air/Fuel Wideband Gauge in a 2.67″ (68mm) diameter opening in your desired location (dashboard, gauge pod, etc.).
2. Connect the Power and Lighting Harness: Connect the 3 ft Power & Lighting Harness to a suitable power source (typically 12V switched) and ground in your vehicle. This harness will also power the gauge’s illumination.
3. Connect the AEM Controller Output: Utilize the AF/WB Throttle Position Harness to connect the analog output signal from your AEM inline wideband controller to the input of the Speedhut gauge. Ensure correct polarity and connection points as specified in both the gauge and the AEM controller’s manuals. The gauge reads an input of 0.5 volts to 4.5 volts, corresponding to the 8.5-18 AFR range.
4. Connect the Warning Light (Optional): If desired, connect the wiring for the warning light output to an external indicator or use the gauge’s integrated warning light feature (refer to the gauge’s specific wiring diagram for details on setting up the warning threshold).
5. Connect the Tachometer Harness (If Applicable): The included 8 ft Tachometer Harness (1 Wire 2 Pin Connector) is for specific LED-lit gauges and might not be directly used for the air/fuel function of this gauge. Refer to the Speedhut documentation for its specific application.
6. Calibrate (If Necessary): Some wideband systems require initial calibration of the oxygen sensor and controller. Follow the instructions provided with your AEM inline controller for any necessary calibration steps. The Speedhut gauge itself typically displays the signal it receives from the calibrated controller.
7. Monitor Readings: Once everything is connected and powered on, the gauge will display the real-time air-fuel ratio based on the signal from the AEM controller.
8. Set Warning Thresholds (If Applicable): If the gauge has a user-configurable warning feature, follow the instructions in the gauge’s manual to set the desired upper and lower AFR limits for the warning light to activate.

BENEFITS OF USING THE SPEEDHUT 2-5/8″ AEM AIR/FUEL 8.5-18 GAUGE W/ WARNING (R25-WB3-REV):

• Improved Engine Performance: By accurately monitoring the air-fuel ratio, you can fine-tune your engine for optimal power and efficiency.
• Enhanced Engine Longevity: Maintaining the correct AFR prevents excessively lean or rich conditions that can lead to engine damage.
• Real-time Feedback: Provides immediate and continuous information about your engine’s combustion process.
• Early Problem Detection: The warning light feature can alert you to potential issues with your fuel system or engine tuning before they cause significant problems.
• Seamless Integration: Designed to work with AEM inline controllers, ensuring compatibility and reliable data.
• Simplified Installation: The included wiring harnesses streamline the installation process.

FEATURES:

• Wide Measurement Spectrum: Accurately displays air-fuel ratios from a very rich 8.5:1 to a very lean 18:1.
• Direct AEM Controller Interface: Optimized for use with AEM inline wideband oxygen sensor systems.
• Straightforward Wiring Connections: Comes with pre-terminated harnesses for power, signal, and lighting.
• Clear Analog Signal Interpretation: Reads a 0.5V to 4.5V input signal, translating it into the corresponding AFR value on the display.