Wideband Air Fuel Ratio Gauge Review

Wideband Air Fuel Ratio Gauge Review

AEM’s X-Series Wideband UEGO Air/Fuel Ratio Sensor Controller Gauges are built upon distinctive, patent-pending X-Digital know-how that makes them the fastest responding wideband air/fuel ratio controllers in independent testing against 17 different wideband UEGO air/fuel controllers*.

The X-Series Wideband UEGO AFR Sensor Controller Gauge (PN 30-0300) measures 2 1/sixteenth-inch (52mm) in diameter, and incorporates a modern, visually putting faceplate and new seven-segment heart show that's 87% larger than the 30-4110 AEM Wideband Gauge’s heart display. This creates the perception of a larger general gauge, but in a typical 52mm dimension for simple mounting. Its slim depth (less than one inch general) and ultra slim cup depth of .200-inches dramatically will increase its utility base and potential mounting locations.

The X-Series Wideband UEGO AFR Gauge has a person configurable show via buttons on the gauge face that assist you to change AFR values for different fuels, Lambda or O2%, change the center show to a few or four digits, carry out a free-air calibration if desired because the sensor ages, and change the CAN message ID when linking multiple X-Series Inline Controllers or X-Series Controller Gauges. A black bezel and black dual-confronted faceplate for air/fuel and Lambda are included, and an elective silver bezel with white dual-confronted Wideband Air Fuel Ratio Gauge Review and Lambda faceplate is offered (PN 30-0300-ACC, sold individually). An Auto Dimming feature is included. Locking connectors guarantee a positive connection between the harnesses and gauge and a brand new single board design adds to the new gauge’s durability.

The gauge includes a zero-5v and RS232 Serial Port output for feedback management and data logging, and an AEMnet (CANbus) output for data logging. AEMnet permits additional X-Series Wideband Controllers to be daisy chained together (up to sixteen cylinders) for recording AFR in multiple cylinders. It supports vehicle/system voltages up to 16V, and can be utilized on EFI or carbureted functions, and dynamometers in functions using gasoline, methanol, ethanol, Diesel, propane and CNG.

X-Digital Technology

X-Digital wideband know-how offers these controllers the ability to learn and report values that different controllers don't, which can ship extra optimized engine tuning and a safer general operating condition. The controller’s excessive speed digital implementation ensures no lack of sign constancy and full transient response, making it able to establish the slightest fluctuations in AFR and output them in full value.

Why Does Response Time Matter?

Sooner response time improves wideband feedback management, and may present a safer, extra powerful and accurate tune. AEM’s Wideband Controllers with X-Digital know-how can reduce deadtime and enhance the performance of your vehicle via extra accurate AFR tuning. Deadtime is the delay between when exhaust gasoline composition changes and when that change is reported by the O2 sensor. While move of exhaust gases (transport delay) can have an effect on deadtime, it's not the one source. Often, the sensing parts response to the gasoline is the most important contributor to deadtime when an engine is in excessive RPM beneath load.

When tuning an engine using wideband AFR feedback management on an inertia dyno, deadtime impacts the information you're looking at because it is reported in a special operating location than when it actually occurred. This means with lengthy deadtimes, whatever changes you make to the bottom fueling will likely be within the wrong location. This can be significantly dangerous to excessive compression and excessive-boost compelled induction vehicles, and EFI systems that use feedback management to auto tune.

Decreasing deadtime improves wideband feedback management, and may present a safer, extra powerful and accurate tune. AEM’s Wideband Controllers with X-Series digital know-how can reduce deadtime and enhance the performance of your vehicle via extra accurate AFR tuning.

Manufacturing facility Calibration Resistor or Free Air Output
The X-Series Wideband Gauge and X-Series Inline Controller support the popular Bosch 4.9LSU sensor and may utilize each the manufacturing facility calibration resistor and free-air calibration methods**. This allows users to take advantage of the precise manufacturing facility resistor calibration when a sensor is new but then permits for free-air calibrations if the person needs when the sensor ages. It’s the right marriage of simplicity and accuracy!

What Is A Wideband??

AEM's Wideband UEGO (Common Exhaust Gas Oxygen, pronounced “You-Approach-Go”) Controllers are powerful, price efficient tuning tools that allow users to accurately monitor the Air/Fuel Ratio (AFR) of their engine.

Why Use A Wideband??

Accurate AFR data is important when tuning an engine. Operating rich (very low air/fuel ratio, excessive fuel) may cause a loss in energy, whereas operating too lean (very excessive Wideband Air Fuel Ratio Gauge Review ratio, not enough fuel) may lead to serious engine damage. Using a wideband air/fuel controller throughout the tuning course of allows you to monitor AFR and regulate tuning parameters to optimize them for maximum energy and efficiency. AEM has a comprehensive line of highly accurate, dependable wideband air/fuel controllers that may help guarantee your vehicle is optimally tuned.


  • X-Series Wideband UEGO AFR Controller Gauge had been fastest responding wideband air/fuel ratio controllers in an independent check vs. 17 competitor wideband AFR controllers
  • Includes Bosch 4.9LSU wideband UEGO sensor
  • Manufacturing facility calibrated resistor does not require free-air calibration, but know-how permits for free-air calibration as sensor ages if person needs
  • Compatible with vehicle/system voltages up to 16V
  • zero-5V & RS232 output for data logging and feedback management, AEMnet (CANbus) for data logging and daisy-chaining multiple controllers up to sixteen cylinders
  • Can show AFR values in hundredths of %
  • 52mm gauge diameter and slim 0.825” gauge depth
  • Gauge cup depth only .200” deep!
  • Auto dimming feature
  • Person configurable show via buttons on the gauge face for changing AFR values, Lambda and O2%, and three- or 4-digit show
  • Black bezel and black dual confronted faceplate included (gauge only, silver bezel/white gauge option sold individually, PN 30-0300-ACC)
  • Locking connectors