I think Michael Yount has been trying to eliminate the drone in his volvo for a while now.. not sure where he's at now but i'm sure i remember reading about how many different muffler/resonator combo's he's tried!
Michael went with a dual exhaust and resonator(s) for a Boss 429 from MU (or something like that) last time we chatted about it. He seemed very happy with it, however it was (Like Mav, I cant keep his combos straight).
Dumb question but are you sure you don't have a hole in your exhaust/muffler. that is crazy loud to be just idling. I love the drone in tunnels.......... (hits@1700 rpms) I agree--sweet thread. unequal length mufflers, the physics is there, that is how DaimlerBenz and all the high class crowd cancel road noise with baffles, etc,etc.
some times i find myself reaching for the volume knob on my stereo and turning it down, just to relize that i cant turn my exhaust down lol.
like at drive through windows and stuff like that i shut my car off.
otherwize my order is never correct. owell
I would deffinately say you have a problem somewhere. On the 331 in my car I have almost the exact setup, bbk shorties to h to 2 chamber flows, and the only drone is when moderately on the throttle like 2k to 3k or so, but yours sounds much louder even when idling, so I would suspect something is wrong.
I'm using 3 mufflers for zero drone. One mid mount dual-in dual-out Magnaflow with tru-x core and two cheap imco turbo mufflers out back. My car is a tbird so I don't know if that setup would fit under a Mustang well.
Everyone loved the way it sounded without the turbo mufflers but that lost too much torque on a stock motor and was way too loud. The drone was also unbearable.
my car is crazy loud at idle too..but i have dumps. The noise/vibrations bounce off the ground and right back up at the car making the whole thing hum/gurgle. Not much you can do without trying something extensive like longtubes, new muffs, or trying that different length thing...but im not sure if thats going to work for u