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Old 09-23-2018, 08:39 AM   #10 (permalink)
ProDigit
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A lot of cars run slightly rich in this RPM range, because it's mostly used for acceleration.

Once you get above 1700-2000RPM, this is your cruising range, your car will run leaner.
Making your engine run lean at those low RPM ranges, will make it slower off the line, and might get you starting issues in cold weather.
If you live in hot climates, and near sea level, you can lower fuel consumption around these rpm ranges significantly (with a fuel commander of some sorts).
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