View Single Post
      01-08-2012, 04:09 PM   #56
Edman951
Second Lieutenant
Edman951's Avatar
Canada
10
Rep
285
Posts

 
Drives: F10 550xi, Alpine white
Join Date: Nov 2006
Location: Montreal, Quebec

iTrader: (1)

FYI, did another test on Friday.
i figured i should try all the possible combo's with my setup to find the sweet spot, and reduce the drone with out any parts.
So here is my conclusion.

-Stock center resonator (x-pipe) with my vibrant muffler = drone from 1300-2000rpm. But sound great.
- My X-pipe with with my vibrant muffler = same drone as above. from 1300-2000rpm. But sound even beter then with the stock center resonator.
-My x-pipe with factory mufflers = no drone, a bit of sound, but needs a bit more for my taste.

So to reduce drone, i will need to tap in to the line and add a resonance chamber. Like Active Autowerk does on the E9X M3 exhaust system.
Or maybe i will try this muffler from Dynomax. Looks interesting.
http://www.dynomax.com/mufflers.php?muffler=vt
__________________
F10 550i Xdrive M sport, white
trade-in 2008 E90 M3