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On a road trip yesterday noticed something rather odd.
at 70mph i was cruising at 17.9-18.2 inches of vacuum with tps values from 10-12% returning 38.5-43mpg on flat level ground
at 82mph I was cruising at 18.8-19.1 inches of vacuum with tps values from 14-16% returning 40-42mpg on flat level ground
I tested this multiple times, back to back. no change in temperature, elevation, or wind.
cam phase advance was set at 10 the entire time.
Perhaps there is some sort of standing wave forming in the intake? bad tuning? who knows.
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