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When I finish my injector driven MPG gauge, I will be happy to do an A/B/A test with the factory cold air intake then with a cone filter right on the throttle body. That will put the whole issue to bed, at least for me. Until then, the Scanguage is not accurate enough to tell if WAIs work. It tells you how much fuel it thinks the engine should get, not what it's actually getting. I notice that after fillups during the time of year with large temperature swings, I have to make significant changes to the fillup trim values.
BTW, jcantara is absolutely right. RPM and MPH are directly related. That's why we call them gear ratios.
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