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I don't think accurate calibration of your Ultra Gauge is that important, since you'll be measuring relative changes in ABA testing before and after WAI installation.
Coolant temp is a cruder index than IAT. It's a measurement result of engine load, rather than a possible cause of engine efficiency. We're hoping IAT causes better FE, but IAT is a result rather than a cause.
Yes, if a WAI "box" helps raise IAT, build it and test it.
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Darrell
Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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