Convertible Drone Theory
11/16/06, 12:45 PM
#1
Team Mustang Source
Thread Starter
Join Date: April 22, 2004
Posts: 468
Likes: 0
Received 0 Likes
on
0 Posts
Convertible Drone Theory
Wanted to throw this out and see if anyone has pondered if the bad drone we vert owners are experiencing with some axleback systems because of the hollow spaces in the rear where the vert struts fold down. Would that be the "B" pillar? It occurred to me after I read one of the numerous drone posts that someone said vert owners were complaining the most (like me 
), and then I realized we might have two big resonance chambers there!!! Anyone know if there's space to wedge some dampening material in there? Looking for the big brains or gearheads to repsond on this one.
-Darth
), and then I realized we might have two big resonance chambers there!!! Anyone know if there's space to wedge some dampening material in there? Looking for the big brains or gearheads to repsond on this one. -Darth
11/16/06, 02:15 PM
#2
11/20/06, 03:20 PM
#4
This could also be somewhat due to the Rear end Ratio keeping the RPM's lower for a longer period of time...My vert has the 3.31 gears while my wife's coupe has the 3.55's which has a tendency to be out of the drone range quicker 1800 - 2000 RPM's. Just a thought. Now if even the 07 guys are complaining of the same problem that theory is right out the window as I am under the impression that all the 07 GT's received the 3.31 gears.
11/20/06, 05:45 PM
#7
Cobra R Member
Join Date: July 9, 2006
Location: Hillsboro MO, just south of St. Louis
Posts: 1,763
Likes: 0
Received 3 Likes
on
3 Posts
My FRPP's had bad drone when I first got them, since then I have gotten a tune, CAI, and a few miles on them. The biggest difference came with about 800 miles on them, the rumble is still there, but the drone is toned down a lot. With the CAI, I noticed a bit of a drop but that was also with the mileage too. With a tune, I asked for my shift points for my driving habits to be adjusted around that 1800 rpm spot.
I can live with the drone now. At first it was killer, and not in a good way.
I can live with the drone now. At first it was killer, and not in a good way.
11/20/06, 11:37 PM
#9
Bullitt Member
Premium fuel should reduce the pre-knock grumble which translates into a louder drone.
Another method would be to buy Nylon-two 1/4" Neoprene Wetsuit Rubber and line the cavity as much as possible. Neoprene should absorb much of that frequency.
Another method would be to buy Nylon-two 1/4" Neoprene Wetsuit Rubber and line the cavity as much as possible. Neoprene should absorb much of that frequency.
11/21/06, 02:16 PM
#10
Bullitt Member
Join Date: May 21, 2006
Posts: 274
Likes: 0
Received 0 Likes
on
0 Posts
Never had a drone with either the original GT/CS exhaust set-up or the new FRPP GTAs, same as Buster. Maybe we should start a poll on this, and check out the results. Any volunteers?
11/21/06, 11:31 PM
#11
Bullitt Member
Join Date: February 21, 2006
Posts: 289
Likes: 0
Received 0 Likes
on
0 Posts
All of the aftermarket, non-Ford, exhausts have drone except the corsas. If you don't think you have it, you either don't know what drone is or you don't spend a lot of time driving at that certain rpm. Drone is produced when the frequency of the exhaust matches the natural frequency of the pipes.
11/22/06, 07:29 AM
#13
GT Member
Join Date: October 20, 2006
Location: Caldwell, ID
Posts: 139
Likes: 0
Received 0 Likes
on
0 Posts
semperfi65, Here is a military answer for question.
That's a good idea about the poll, get it started...
11/22/06, 09:37 AM
#14
Bullitt Member
Join Date: July 2, 2005
Posts: 430
Likes: 0
Received 0 Likes
on
0 Posts
11/22/06, 11:23 AM
#15
Team Mustang Source
Thread Starter
Join Date: April 22, 2004
Posts: 468
Likes: 0
Received 0 Likes
on
0 Posts
-Darth
11/28/06, 07:35 PM
#17
Team Mustang Source
Thread Starter
Join Date: April 22, 2004
Posts: 468
Likes: 0
Received 0 Likes
on
0 Posts
11/29/06, 04:38 AM
#18
11/29/06, 04:58 AM
#19
Team Mustang Source
Thread Starter
Join Date: April 22, 2004
Posts: 468
Likes: 0
Received 0 Likes
on
0 Posts
Okay, I think you're talking about the actual muffler hanger, not a new part. It is made of rubber and has holes where the prongs on the muffler go. I've noticed a thread on here talking about replacing the over axle pipes, anyone with this setup have drone issues? I'm seriously thinking of a way to put a rubber damper around the pipe to deaden vibration, maybe I can hit Home Depot and see what they've got....
-Darth
-Darth
