Help! Sound from right wheel well or under right dash

[TMass]

Guys;

Before I take it in to the Porsche dealership; I am getting a "rrrrrrrrrr" noise that appears to come from the right wheel well or maybe the right side of the dash when I am in 2nd or 3rd gear between 2600 and 3200 rpm and only if the gas is being pressed and clutch engaged. If I i come off the gas or disengage clutch the sound stops...I can rev the motor up thru those rpms and get no sound. My normal mechanic inspected and took apart the right front wheel and said bearings, brakes and everything looked fine.

I am going to take it to the dealer and see if they can do some diagnostics to better pin point what is causing it.

Any thoughts or suggestions?