K&N Fuel Air Monitor Kit

The K&N Air / Fuel Monitor is a precision instrument designed to help mud motor performance enthusiasts calibrate an optimum air/fuel mixture ratio . It calculate the amount of carbon monoxide (CO) and hydrocarbon (HC) emissions as related to the air/fuel ratio. Leaning the air/fuel mixture reduces CO and HC emissions.



To "read" the air/fuel mixture, the system uses an oxygen sensor to sample the exhaust gas. The sensor "sniffs" the exhaust and measures the amount of oxygen present in the spent gases. When used as part of a computer controlled feed-back system, the oxygen sensor tells the computer (via a small electric signal) when the air/fuel ratio is rich, lean or just right. The computer reacts to the signal by re-calibrating the fuel delivery system thousands of times per second. This feedback control loop, or "closed loop" system maintains a near perfect air/fuel ratio throughout the entire operating rpm range. The K&N Air/Fuel Monitor uses this same electric signal to illuminate a group of 10 LED lights that correspond with an air/fuel ratio scale. Reading the scale will tell if your fuel calibration is rich, lean or just right. Using the Monitor as a tool, a tuner can adjust for peak performance, economy and/or drivability under any load condition or throttle setting.

Although BPS carb kits are designed to run with all combinations of BPS components, each engine can be individually fine tuned for your combination of muffler, intake, heads, valves, gear set and loads. Fine tuning your BPS engine can save you fuel, provide more power and performance at idle, mid range and full throttle.

The monitor reads oxygen left in the exhaust so the number of lights and the corresponding scale remains the same. Monitors have red, yellow and green lights that require 100 millivolts per light for a total of 1.0 volt.

A K&N Air/Fuel Monitor has many uses. For example, it can be used as a guideline for preparing a vehicle for emissions testing or as a piece of dynamometer test equipment.

You must weld the sensor into your exhaust system. For dual exhaust, you must purchase two sensors and a switch.

The BPS K&N kit contains one sensor, round gauge and round mounting bezel.

$240 (available August 2011)

801-352-8011