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I performed my first A-B-A test last night, as a shakedown on procedure.
Test was on only the first section of the belly pan, from front bumper to just rear of the front A-style control arms, approximately 41" of underbody covered out of 16' something of truck.
Test results were depressing. There was little or no change due to the belly pan.
A: average MPG = 27.9
B: average MPG = 27.5
A: average MPG = 27.25
The only thing that I can see causing the downward trend was dropping temperature and rising humidity, or the number of cars passed on the first test made my MPG higher...
Tests were performed on a 37.4 roundtrip drive starting at 11:29pm and going until almost 2:00am this morning. Temperatures varied from 46 degrees F to 42 (according to online weather data), but observed Intake Air temps averaged 46 degrees F.
See attached data sheet, typed up from hand written.
Any thoughts?
Thanks,
-Stephen
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