Thread: Dreadful drone
View Single Post
Flieger Flieger is offline
Max Sluiter
 
Flieger's Avatar
 
Join Date: Mar 2006
Location: So Cal
Posts: 19,573
Garage
So this is a sheet metal ringing/clacking, not an exhaust drone? I think of "drone" being an unpleasant resonant pulse of the exhaust gas sound waves caused by constructive waves superposition at certain frequencies (rpm). This is sometimes called "beat frequency" and is the bane of twin-engined airplane pilots.
__________________
911S
1971 chassis, 2.7RS spec MFI engine, suspension mods, lightened

Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
http://www.flickr.com/photos/max_911_fahrer/
Old 12-29-2009, 08:48 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #35 (permalink)