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Old 10-05-2012, 06:17 AM
Officially Welcomed to the 'Fest
Location: San Francisco
Join Date: Aug 2009
Posts: 10,410
Mein Auto: 2009 E93 N54
Originally Posted by bear-avhistory View Post
I have mine locked open using the JB4, prior to that I unplugged it in the trunk. My butt dyno can't feel any effect one way or another & I don't see any effect on mileage. I just like the sound.

Wondering if back press diff, flap closed vs open, had been measured. Direct effect on engine feel & turbo runup.

Flap disabled, my ride's closest ever to feel of natural aspiration. Prior, had to put my foot completely flat on the go pedal to get smooth response from a full stop. Forgiving to a degree now.
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