So I have a 2010 GT with Flowmasters... love the sound but HATE the drone at 1700-2000 RPM.

I was thinking... what if I installed resonators further up the exhaust - staggered as to alter the sound waves enough; would it eliminate the drone? What about the possibility of installing a resonator on 1 side of the exhaust, only? What are the opinions out there? What are the chances that theres a sound engineer out there in Mustang Forums land?

Thanks in advance for your input.

-- Mike

 

More FRPP Borla Stingers drone in the same RPM range. I shift out of it or DRIVE out of it ("Sorry officer, but I was speeding because my exhaust drones at the PSL..."). I live it and my wife actually likes it.

I've heard that offsetting the mufflers helps but I'm not sure how that works with axlebacks. Have you checked with a local speed shop?

 

What Flowmaster's do you have. I had an '09 w/ Pype's Violators. No drone what so ever. Chambered / baffled mufflers will give you the dreaded drone you are talking about. The Pype's where a louvered tube like the OEM only with a larger tube, and larger louvers. They were reasonalbly priced and gave a much better sound than the OEM. Not sure what to call the type of muffler them OEM unit is called. Nuke?

 

I think doing a mid-mounted offset muffler like the Borlas will get rid of the drone (using this in conjunction with the Flows). Pretty sure you can also just do the mid-mount setup without axle-backs (just tips), but not sure about how loud that would be. There's some stuff on YouTube.

 

been there.. done that.. drone MAY decrease.. but will always be there.

 

Huh? What? I didn't do it!!

I really don't know offhand...

 

Ditto....drone is part of the package with Flowmasters. I've driven a Hemi Ram for 7 years with FM Super 44's dumped...drone city!

Corsa on the Mustang however has NO drone, even with the O/R pipe!

 

Chambered style mufflers are not the cause of drone, its the positioning of the mufflers from the engine, pipe diameters, location of the tail pipes, and a few other things. Even if a sound engineer was to join in, there isn't enough info to actually calculate what you need.

Your resonator idea is probably the best bet. I'd put it on both sides , probably about a 3" offset in the spacing. What kind of flowmaster's are you using? A higher quality axleback would also help, you're going to pay 100-150 to get the resonators installed most likely.

 

I put high flow cats (metallic) in mine to get rid of drone. Made a world of difference with my flow masters. Plus some sound deadening material. All is good

 

What he said ^^ Drive out of it. Drone will always be there on some level.