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Flatbob
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-- 01-20-2014 @ 1:18 PM
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I direct this question to Super only because he has mentioned the A/F analyzer in some of his posts I believe. Someone has told me that the A/F should only be used when the engine is under a load as on a dyne or the car is actually being driven. Is this true?
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supereal
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-- 01-20-2014 @ 2:48 PM
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I'm not sure exactly what you are asking. I take A/F to be what we call the "mass air"reading. We do lots of readings in a typical week. With the advent of "serial bus" systems, it is only going to get more complicated. I don't recall using the term. but at my age, I am lucky remember lots of things.
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Flatbob
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-- 01-20-2014 @ 2:55 PM
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Understand the memory problem as am experiencing the same and may explain that you were not discussing air/fuel measurements in one of your posts as I thought. Thanks for taking the time to respond.
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supereal
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-- 01-20-2014 @ 7:31 PM
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The use of a Wheatstone bridge device to measure the hydocarbon content of the exhaust was common years ago.. Today, with fuel injection replacing the carb, this is constantly measured by one or more oxygen sensors that report to the ECM (engine control computer) to adjust the amount of fuel required for the speed and load. This testing is constant. As carbs couldn't be constantly adjusted, it was mostly done at or near the point where torque and horsepower crossed, either on a dyno, or a hookup on the road. It was time consuming, thus expensive, and largely used on race cars.
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