Question on plugging a muff pipe to lower resonance
Thread Starter
Melting Slicks
Joined: Apr 2001
Posts: 2,120
Likes: 223
From: Ca.
Question on plugging a muff pipe to lower resonance
I remember reading about a few folk who plugged one outlet on each muffler to lower resonance. What did you use? I want to find something that I can also remove easily. I had to ask this after droning around today on slow speed roads-right in that resonace rpm band with my borlas.....Huh? Whatcha say?........
I tried temporarily duct taping over one outlet each when I got home and it was a noticable improvement. But duct tape on the outside of a tailpipe is a little tacky lookin....much worse than someone's custom air intake (sewer pipe and dryer vent-:cool:). :D
I tried temporarily duct taping over one outlet each when I got home and it was a noticable improvement. But duct tape on the outside of a tailpipe is a little tacky lookin....much worse than someone's custom air intake (sewer pipe and dryer vent-:cool:). :D
Safety Car
Joined: Mar 2000
Posts: 3,620
Likes: 2
From: Hillsboro OR
Re: Question on plugging a muff pipe to lower resonance (drive it)
There's always a potato but its probably more tacky than the duct tape.
I wonder if you could get a freeze plug that would work or a cast iron pipe plug.
I wonder if you could get a freeze plug that would work or a cast iron pipe plug.
Le Mans Master
Joined: Feb 1999
Posts: 6,172
Likes: 11
From: somers, ny
Re: Question on plugging a muff pipe to lower resonance (skilawyer)
I use a plumbers pipeplug; one in each muffler. It works great. Just a wing nut to tighten or remove. Does quiet the car down a bit.
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
Re: Question on plugging a muff pipe to lower resonance
I use an exhaust pipe reducer with a metal sears lawnmower gas cap riveted to the small end. It slips inside tight comes out for the track. I put a small long bolt across to grap with pliers to get them out. They do pop out sometimes at WOT, but the tips of the B&B hold them.
I tried the pipe plug in the B&B and could not get the fit I needed!
I tried the pipe plug in the B&B and could not get the fit I needed!
Safety Car
Joined: Jun 1999
Posts: 3,641
Likes: 2
From: Southern California
Re: Question on plugging a muff pipe to lower resonance (PeteL)
If you want to lower resonance you need a tip that is angled towards the ground or "turn downs." This way the power is always there.
