WEGO III Wide-Band Air/Fuel Ratio (AFR) Tuning Aids

 

· Complete air/fuel ratio metering system with built-in data logging. Includes WEGO III unit shown above, Bosch LSU4.2 5-wire wide-band oxygen sensor, 18x1.5mm weld nut for mounting sensor on exhaust pipe, and software on CDROM

· Versatile tuning aid for all carbureted and fuel injected engines displays air/fuel ratio (AFR) and logs over 2 hours data including AFR, engine RPM, and a spare 0-5V analog input for sensors such as throttle position or manifold pressure

· Can be used for on-road or dyno testing

· Suitable for automotive, motorcycle, and other small engine applications

· Highly accurate with less than ±0.10 AFR error over 10.3 - 19.5 AFR range

· Easy free-air calibration procedure corrects for sensor aging effects

· 0-5V analog AFR output for interface to dyno instrumentation

· Ultra-bright daylight readable blue LED display with automatic dimming under low light conditions

· Wide supply voltage range from 11-16V allows operation from battery on small engines or race vehicles without an alternator. Current draw is approx. 1 amp

· Built-in USB interface

· Fully encapsulated with water-proof LED display

· Compact size: 4"L x 2"W x 0.5"H

Visit our Tech FAQ and find out more about engine tuning with the WEGO!

The WEGO III is a third generation product that utilizes the proven Bosch LSU 4.2 wide-band exhaust gas oxygen sensor.  

By utilizing miniature surface mount electronics technology, digital signal processing techniques, and a switching power supply for the sensor heater, the WEGO III provides the same level of accuracy as lab systems costing thousands of dollars.

Wide-Band Oxygen Sensor on Front Pipe

Download WEGO III Installation Instructions 

Data Logging Software

The WEGO III features data logging and includes a built-in USB interface for easy connection to newer laptop PCs. This data logging capability greatly facilitates engine tuning and diagnosis of driveability issues. The WEGO III can store data for over 2 hours of operation. You can use our WEGO Log software to download and display this data on a chart recorder type screen. Available data includes air/fuel ratio (AFR), RPM, and a 0-5V analog input.  The RPM input can be connected to a tachometer signal or directly driven from an ignition coil. RPM data is correctly scaled and displayed for 1-12 cylinder engines. The analog input can be connected to sensors such as throttle position or manifold pressure. Analog data can be scaled to display the correct units, such as percent throttle position or In-Hg manifold pressure. 

The data logging software, WEGO Log, runs under Microsoft Windows 98/ME/XP/Vista. Minimum PC requirement is a 300 MHz Pentium with super VGA display (SVGA with 1024 x 768 pixel resolution). For more detailed product information, we suggest that you download the WEGO Log software and instructions. The software download includes a sample file with actual data.

Data Logging Chart Display

Download WEGO Log Software and Instructions 

Methanol Calibration

The new WEGO3-SYS-M correctly displays methanol AFR values in the range of 4.5-8.6 on the LED display. This unit was developed and tested in cooperation with Ed Pink Racing Engines. All WEGO III units can be used with methanol fuel and will log data correctly for either gasoline or methanol fuel. You can use the Fuel Type command in WEGO Log software to setup the correct scaling of AFR values. 

World of Outlaws team Tony Stewart Racing uses WEGO methanol units for on-track and dyno testing. Shown above are teammates Donny Schatz (No. 15) and Paul McMahan (No. 20) at the front row of the 2007 Knoxville Nationals. Donny Schatz is the two time defending champion for the Outlaws series (2006 & 2007). The low power consumption of the WEGO allows the unit to be powered by a small rechargeable lead acid gel-cell battery - a considerable advantage since these race cars do not have an electrical system.

Suzuki^® Hayabusa Applications

Please read the Hayabusa Tech Note. This tech note provides WEGO hookup and setup information for Suzuki^® Hayabusa applications. 

Special Applications

We also offer dual channel WEGO IIID units intended for connection to an existing data acquisition system for dyno test lab or professional racing use. These units do not include an LED display or any internal data logging capability. They have a 0-5V analog AFR output. The analog output is linearly scaled with 0V=10.0 AFR and 5V=20.0 AFR (the useful range is 10.3 to 19.5 AFR) and is compatible with industry standard 0-5V analog inputs on most data acquisition systems. Special pricing allows equipping a V8 race engine with individual cylinder AFR monitoring for under $1600.00! For more details, download the WEGO IIID Race Pack Tech Note. 

New Dual Channel  WEGO IIID

In 2005, Warren Johnson was the first racer to use our WEGO system for individual cylinder AFR monitoring. The original system is still working reliably after two seasons of hard racing.

Using our dual channel WEGO and an Edelbrock QwikData™ data acquisition system, J&P Cycles® just set a new national AMA speed record of 179.940 MPH in the 1350cc pushrod gas class at the 3rd annual Bub® International Land Speed Trials (September 2006 at the Bonneville Salt Flats Speedway).

At the 2nd AHDRA 2007 Screamin' Eagle National Event at Firebird International Raceway in Phoenix, Desert Dawg Greg Krenik set a new AHDRA Pro Modified national record with an 8.815 ET. Greg uses the WEGO to tune his bike in practice and the results speak for themselves.

Exhaust Sniffers 

WEGO units can be used with easily fabricated exhaust sniffers that allow temporary installation on most automobiles and motorcycles for tuning and diagnostic purposes, including vehicles with catalytic converters. The exhaust sniffers are constructed from materials that are readily available at any hardware store. For more details refer to the Automotive Exhaust Sniffer Tech Note  and Motorcycle Exhaust Sniffer Tech Note.

Automotive Exhaust Sniffer

Automotive Exhaust Sniffer Installation

Motorcycle Exhaust Sniffer

Motorcycle Exhaust Sniffer Installation

Part Number	Description	Suggested Retail
WEGO3-SYS	WEGO III Wide-band Exhaust Gas Oxygen Sensor System (includes WEGO III unit with standard length harness for motorcycle applications, Bosch LSU 4.2 oxygen sensor, 18 x 1.5 mm weld nut for exhaust pipe, and software on CDROM)	$399.50
WEGO3-SYS-A	WEGO III Wide-band Exhaust Gas Oxygen Sensor System (includes WEGO III unit with extended length harness for automotive applications, Bosch LSU 4.2 oxygen sensor, 18 x 1.5 mm weld nut for exhaust pipe, and software on CDROM)	$399.50
WEGO3-SYS-M	WEGO III Wide-band Exhaust Gas Oxygen Sensor System with Methanol Calibration (includes WEGO III unit with extended length harness, Bosch LSU 4.2 oxygen sensor, 18 x 1.5 mm weld nut for exhaust pipe, and software on CDROM)	$399.50
WEGO3D	WEGO IIID Wide-band Exhaust Gas Oxygen Sensor Interface (Dual channel interface unit with 0-5V analog AFR outputs for motorcycle applications. No LED display or internal data logging. Intended for connection to an existing data acquisition system for dyno test lab or professional racing use. Requires two Bosch oxygen sensors P/N EGO-LSU42 sold separately. Harness length 68" for channel 1 and 42" for channel 2)	$252.00
WEGO3D-A	WEGO IIID Wide-band Exhaust Gas Oxygen Sensor Interface (Dual channel interface unit with 0-5V analog AFR outputs for automotive applications. No LED display or internal data logging. Intended for connection to an existing data acquisition system for dyno test lab or professional racing use. Requires two Bosch oxygen sensors P/N EGO-LSU42 sold separately. Harness length 42" for both channels)	$252.00
WEGO3D-RACE-PACK	WEGO IIID Wide-band Exhaust Gas Oxygen Sensor Interface Race Pack (Complete kit for individual cylinder AFR monitoring on V8 race engines. Includes 4 dual channel WEGO IIID units and 8 Bosch LSU 4.2 wide-band oxygen sensors, 12 foot extension cables,  and 18 x 1.5 mm weld nuts. Intended for connection to an existing data acquisition system)	$1595.00
WEGO-TACH-ADAPT	WEGO Tach Adapter (required when using WEGO3-SYS on motorcycles with CD type ignition)	7$50.00
WEGO-CBL-12	Extension Cable for WEGO III (12 foot extension cable from Bosch LSU 4.2 sensor to WEGO III for dyno room installations)	$28.00
EGO-LSU42	Wide-band Exhaust Gas Oxygen Sensor (replacement Bosch LSU 4.2 sensor with special connector for WEGO II and WEGO III series. Note: cannot be used with original WEGO system)	$99.50
USB-CBL-10	USB Extension Cable (10 foot type A male to female cable for use with WEGO III)	$9.50

 

WEGO Accessories	Part Number/Description	Suggested Retail
	EGO-WELD-NUT 18 x 1.5 mm Weld Nut (for mounting wide-band sensor on exhaust pipe)	$5.25
	EGO-PLUG 18 x 1.5 mm Hex Socket Plug (mates with 18 x 1.5 mm weld nut. Allows removing oxygen sensor)	$5.25