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      01-08-2012, 05:09 PM   #56
Second Lieutenant
Edman951's Avatar

Drives: 2014 i3, Capparis 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.
Current, i3 Capparis White, Lodge interior
Ex- F10 550i Xdrive M sport, white
Ex- trade-in 2008 E90 M3