Posted by Mark CarterMark Carter
on October 18, 2010, 6:22 pm, in reply to "Re: BMW 120D 2.0 2005 - Poor performance until 3000 rpm (waveforms) # (update)"
Hi Mark, the swirl flaps do what they say on the tin, they generate swirl.
The flaps are normally raised/operated at idle/low flow conditions. At higher Rpm/air flow there is no need to generate extra swirl. HTH
Regards Mark
Modern cars, Its all wizardry and witchcraft
