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I have not done any A-B-A testing for this. I do monitor my ScanGauge II like a hawk. My little Zippy show's a nice improvement in MPG when the AIT goes up. My result's are based on a steady Throttle Position (13), Speed (44mph), AIT (50F), MPG (43).
The same road, just a little further down. Steady Throtte Positon (13), Speed (46mph), AIT (70F), MPG (47),
And still further down the same road. Steady Throtte Positon (13), Speed (50mph), AIT (90F), MPG (50).
This has been proven everyday for months and months. I am really happy that the warm weather of Florida is here, 50F in the morning, and 80's during the day.
I don't run A/C cause it drops my MPG by 3, and I'm on my way home from work, so I do't care about a little sweat stain's.
One of these day's I will create an air duct coming directly from the radiator so when the Stat opens, I will get heat. But I want to have a controll mechanism to maintain the temp so that it does not go above 'X'. I don't know what the max temp is before the reverse effect happens, currently has not gotten above 108F. So more monitoring is in order.
I have a little difficulty getting my mind around this, because a colder air is better, just look at Inter-Coolers on Turbo's and other Compressors. But the daily fuel comsumption rates can't lie.
Just my 2cents on this, and no all vehicles will respond the same.
jim
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