The WEGO III is a stand-alone unit with built-in data logging intended for harsh environments:

· Complete air/fuel ratio display 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.

All WEGO systems provide quick and easy at-a-glance verification and adjustment of the sensor free-air calibration. This allows the WEGO to maintain  accuracy as the sensor ages and maximizes sensor life in racing applications where the sensor may be exposed to leaded fuels.

 

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 starts logging data once the sensors have warmed up (typically 15 seconds) and stores the last 8000 samples in non-volatile memory. This allows storage ranging from 13 minutes at 10 samples/second to over 2 hours at 1 sample/second. 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 XP/Vista/7. We no longer support older Windows versions. Minimum PC requirement is a 300 MHz Pentium with super VGA display (SVGA with 1024 x 768 pixel resolution). The WEGO III connects to the PC by means of a USB interface. A USB cable is supplied with the unit. The PC must have a free USB port. If you have an older PC without USB capability, you cannot use the WEGO III. 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

AFR Data Analysis

AFR (air/fuel ratio) table display is only possible when both engine RPM and correctly scaled throttle position sensor (TPS) data has been logged from a fuel injected vehicle. The table format is intended to match the RPM rows and TPS columns used by many industry standard engine mapping systems. The figure below shows logged AFR data.  

AFR Data Display

You can also display and print out the required fuel correction (in percent) based on the AFR target value you select. You can add data from an unlimited number of files that you previously saved. The data will be analyzed and incorporated into the table. Cells that vary more than ±0.5 AFR from the command value are shaded blue for rich or red for lean.

Fuel Correction Display

You can use two approaches to make the required corrections in the your engine mapping software. If you have Microsoft Office with Excel, you can directly copy and paste data from the WEGO software to an Excel spreadsheet and then copy and paste from the Excel spreadsheet into the engine mapping software. In the WEGO software, you can select a range of cells with the mouse and right click to bring up a copy menu. You can also left click on the upper left legend cell to select the entire table and then right click to bring up the copy menu. For more details on using Excel, including sample spreadsheets, please visit the WEGO Tech FAQ. Alternately, you can manually enter the required corrections in your engine mapping software by referring to the printed fuel percent correction table and marking off cells as you edit them. For more details, please download and read the WEGO Log instructions. 

Download WEGO Log Software and Instructions 

Methanol Calibration

WEGO P/N 112003 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. 

 

Dynojet^® Dyno Interface

You can easily interface any of the WEGO systems to a Dynojet^® dyno equipped with the Dynojet^® analog module. If you interface the WEGO IIID, you can display and chart two channels of AFR data along with the other dyno data in the Dynojet^® WinPEP^® software. For complete details, please refer to the WEGO Dynojet^® Interface Tech Note.

 

 

In 2005, Warren Johnson was the first racer to use our WEGO system for individual cylinder AFR monitoring. The original system was upgraded to use our  new WEGO IIID units and continues to work reliably after five 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.

 

Jeannie Pflum of Performance Solutions just set a new 1000cc Production record at the 2010 SCTA World Finals at Bonneville with a 196.476 MPH pass. Performance Solutions uses the WEGO III for tuning.

 

Order online using Paypal or call us at 386-322-7390  (Monday-Friday 9 AM to 5 PM Eastern time) for credit card and COD orders. Free UPS ground shipping on all prepaid orders over $50.00 in continental USA. Free Global Priority mail shipping on all prepaid international orders over $150.00. For online orders, please email any special instructions to sales@daytona-sensors.com.    All products covered by our 1 year limited warranty.

 

Part Number	Description	Suggested Retail
112001	WEGO III Wide-band Exhaust Gas Oxygen Sensor System (includes WEGO III unit with 42" 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)	$460.00
112002	WEGO III Wide-band Exhaust Gas Oxygen Sensor System (includes WEGO III unit with 96" 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)	$460.00
112003	WEGO III Wide-band Exhaust Gas Oxygen Sensor System with Methanol Calibration (includes WEGO III unit with 96" extended length harness, Bosch LSU 4.2 oxygen sensor, 18 x 1.5 mm weld nut for exhaust pipe, and software on CDROM)	$460.00
115005	WEGO Tach Adapter (required when using WEGO3-SYS on motorcycles with CD type ignition)	7$51.50
115004	Extension Cable for WEGO III (12 foot extension cable from Bosch LSU 4.2 sensor to WEGO III for dyno room installations)	$28.52
115001	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)	$109.63
115006	USB Extension Cable (10 foot type A male to female cable for use with WEGO III)	$10.00

EGO Accessories	Part Number/Description	Suggested Retail
	115003 18 x 1.5 mm Weld Nut (for mounting wide-band sensor on exhaust pipe)	$5.66
	115002 18 x 1.5 mm Hex Socket Plug (mates with 18 x 1.5 mm weld nut. Allows removing oxygen sensor)	$5.66
	115007 18 x 1.5 mm Stainless Steel Weld Bung (for mounting wide-band sensor on exhaust pipe)	$8.75
	115008 18 x 1.5 mm Stainless Steel Plug (mates with 18 x 1.5 mm weld nut. Allows removing oxygen sensor)	$8.75

 

Exhaust Sniffers 

WEGO units can be used with exhaust sniffers that allow temporary installation on most automobiles and motorcycles for tuning and diagnostic purposes. Jims (www.jimsusa.com) offers an exhaust sniffer, P/N 777, suitable for use with the WEGO. For additional information on do-it-yourself sniffers, refer to the Automotive Exhaust Sniffer Tech Note  and Motorcycle Exhaust Sniffer Tech Note.

 

Jims P/N 777 Exhaust Sniffer

 

DIY Automotive Exhaust Sniffer

 

DIY Automotive Exhaust Sniffer Installation

 

2010 and later H-D^® touring models are equipped with miniature 12mm oxygen sensors. The Bosch LSU 4.2 wide-band oxygen sensors used with the WEGO series are 18mm and will not fit. Smaller wide-band sensors are not available. However, there is a solution. Bay Area Performance Cycles (Phone: 650-969-0372) sells an oxygen sensor manifold kit (suggested retail price $469.00) that allows easy installation of Bosch LSU 4.2 wide-band sensors on any exhaust system for testing purposes. The process involves drilling small holes and using a special tool to install threaded fittings for the sensor manifolds. After testing, button head stainless steel screws are installed in place of the sensor manifolds and the heat shields are reinstalled.   

Bosch Wideband Sensors on 2010 Model Using the Installation Kit

 

Bay Area Performance Cycles Oxygen Sensor Installation Kit

 

Dash Mount Displays 

Looking for a single or dual channel dash mount display to use with your WEGO system? VEI Systems sells single and dual channel displays that are compatible with the 0-5 volt output of our WEGO systems. These displays will read out directly in AFR units. Prices at at $79 for single channel and $99 for dual channel displays. For more information, visit VEI systems at www.veisystems.com. When ordering from VEI Systems, ask them to preset the display to read 10.0 AFR at zero volts and 20.0 AFR at 5.0 volts.

VEI Systems Dual Channel AFR Displays

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