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Discussion Starter · #1 ·
Well here is something interesting and maybe the tuners can respond if they were aware of this already or not...

A guy I know uses EFI live to tune his LBZ Duramax. He recently did some testing on a long trip and found that if he opened his vanes wider at freeway cruising throttle position. So instead of running 3 to 6 lbs of boost at 75 mph he is now seeing 1 to 2 lbs and gained about 2 mpg.

Is that what the Econ tunes are doing with the SCT?
 
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