PN: 30-4900A Wideband and Boost/Vacuum Gauge combo that can save your engine if it runs lean
AEM's Wideband Failsafe Gauge provides the ability to accurately tune AFR, while actively protecting your engine by constantly monitoring AFR curves and activating a user-defined failsafe strategy if it runs lean.
The Wideband Failsafe Gauge is a Universal Exhaust Gas Oxygen (UEGO—“you-way-go”) controller with an internal boost sensor, an internal data logger and a full color Organic Light Emitting Diode (OLED) display. It includes technology to activate a failsafe strategy in the event AFR falls outside of a user-defined operating window. If the AFR falls outside of the set operating window, the Wideband FAILSAFE Gauge triggers a user defined output function that can save an engine from catastrophic damage.
This gauge is a must have for all tuned performance engines, either forced induction or naturally aspirated, fuel injected or carbureted. Any high performance vehicle owners who want a highly accurate AFR tuning tool with internal data logging and a protection strategy that can save an engine from catastrophic failure will want this Failsafe device.
The software's intuitive Gauge Configuration tool makes setting up the faceplate configuration a snap. The software also simplifies set up of the AFR safe operation window and alarm trigger (see Capability tab).
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THIS POLICY ONLY APPLIES TO INSTALLERS AND/OR USERS WHO ARE LOCATED IN THE UNITED STATES, HOWEVER CUSTOMERS WHO RESIDE IN OTHER COUNTRIES SHOULD ACT IN ACCORDANCE WITH THEIR LOCAL LAWS AND REGULATIONS.
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Since the Wideband Failsafe Gauge is a wideband AFR controller with an internal boost sensor (up to 29 PSIg), it is able to display AFR and either boost or vacuum in real time on a vibrant Organic LED screen. It also includes an on board data logger that records AFR, RPM* and boost/vacuum and can be downloaded and viewed in AEMdata analysis software. The gauge includes a low side output for triggering a failsafe strategy in the event AFR falls outside of the operating window, and an RPM input* to log RPM for tuning purposes.
The gauge’s failsafe strategy is completely user definable, from something as simple as making the gauge flash to using the ground output to trigger a check engine light, to cut boost, retard timing, or even switch to a safety map using a standalone engine management system.
The Wideband Failsafe Gauge’s software simplifies the interface set up. Choose displayed parameters (AFR, boost or vacuum) on the center OLED screen and bar graph, set the alarm flash mode and adjust the gauge’s lighting for a custom look, then install the correct faceplate to match your configuration (6 faceplates to choose from).
(*Please see important information regarding using the RPM input for the Wideband Failsafe Gauge on the "Specs" tab)
After the engine is tuned and a safe operating window of AFR is established, the Wideband FAILSAFE Gauge continually monitors AFR and boost or vacuum to make sure that AFR does not fall out of the defined operating window at a given boost or vacuum level. If the Wideband Failsafe detects an out of range AFR reading, the gauge triggers a low side output (ground signal with a 1.5 amp draw max) that can save your engine from catastrophic damage (see example strategies, below).
Use the gauge’s intuitive software to configure the low side output, create a user-adjustable time delay strategy to prevent false alarms, and customize the gauge lighting to flash and alert the driver if an alarm is triggered.
Use the Wideband Failsafe gauge's intuitive software to establish a safe AFR operating window, configure the low side output to trigger a failsafe strategy and set a time delay strategy to prevent false alarms
The Wideband Failsafe Gauge contains an on-board data logger for logging over three hours of data recording (20 Hz per parameter) of AFR, RPM*, boost, alarm, and others. Data logs can be downloaded for viewing in AEMdata software.
Additionally, the Wideband Failsafe Gauge is an ideal engine tuning tool. The highly accurate Bosch AFR wideband sensor is maintenance free and never requires free-air calibration, enabling you to fine tune AFR from an AEM programmable engine management system, any other programmable EMS or piggyback programmer. For carbureted applications, it can tell you when it’s time to swap carb(s), change jets or simply modify fuel pressure.
EXAMPLE ENGINE PROTECTION STRATEGIES
NATURALLY ASPIRATED, TURBOCHARGED OR SUPERCHARGED WITH STAND ALONE EMS OR PIGGYBACK CONTROLLER: Can use the low side output to cut revs, retard timing, trigger a separate fuel or ignition map and activate an ancillary warning light. Users with turbos can also trigger the device to cut boost (may require separate solenoid). The aforementioned strategies are provided as an example. Available failsafe strategies will ultimately be dependent on the capability of the EMS or piggyback engine controller.
WIDEBAND FAILSAFE GAUGE TECHNICAL FEATURES:
WIDEBAND FAILSAFE GAUGE INSTALLATION FEATURES:
WIDEBAND FAILSAFE GAUGE FACEPLATE STYLES:
**IMPORTANT INFORMATION REGARDING USING THE RPM INPUT FOR THE WIDEBAND FAILSAFE GAUGE
The AEM Wideband Failsafe Gauge’s (WBFS) engine speed (RPM) input requires a clean square wave tachometer-type signal in order to log engine speed properly.
The voltage of this signal must NOT exceed 16V or go below vehicle ground (zero volts.)
Here are examples of signals that WILL NOT work and could cause damage to the gauge:
Here are examples of suggested RPM input configurations:
*Note: Install the GMR Pickup as per MSD instructions; the GMR is generally installed on the “+” side of referenced signals.
If a signal’s waveform is unknown and cannot be verified with an oscilloscope, it’s safest to assume that the signal won’t work and could possibly damage the gauge. In these cases, it is suggested that the MSD GMR Pickup be utilized to pick up off of an ignition coil.
THIS PRODUCT MAY BE USED SOLELY ON VEHICLES USED IN SANCTIONED COMPETITION WHICH MAY NEVER BE USED UPON A PUBLIC ROAD OR HIGHWAY, UNLESS PERMITTED BY SPECIFIC REGULATORY EXEMPTION (VISIT THE “EMISSIONS” PAGE AT HTTP://WWW.SEMASAN.COM/EMISSIONS FOR STATE BY STATE DETAILS.