Do exhaust trumpets do anything?

[robbinsj]

Other than look good, do exhaust trumpets do anything to modify the exhuast note? I've got Clifford dual headers and Magnaflow mufflers with an H pipe. The exaust sounds good except for between 2800 - 3100 RPM. In that range it sounds harsh and "blatts". I know there's a lot to the subject of sound wave propagation but Physics 205 was a long time ago....
-Joey

 

[CobraSix]

THey play music...usually Miles Davis...


J/k...

Slade

 

[pedal2themetal45]

Lets you blow your own horn
tim

 

[STEVEN.]

I had a pair of these 'Trumpets' made for the back of my Corvair. They slip on right after the 'Shorty'-Cherry-bombs(which themselves are bolted directly behind the exhaust manifolds...),needless to say,it's one of the loudest car's I own . Combine that,with a 4-Speed 'box,and I'm disturbing the peace! Even the 'Lax-Power-Squad' give it the 'Finger :!: ' ~OO6.

 

[MustangSix]

Instead of trumpets what you probably need are resonators to mute the harsh higher frequency "blatts".

Any muffler shop should be able to come up with a short, glasspack type muff that will fit near the end of the tailpipe. There are also resonator tips that you could add that make a significant change in the sound quality.

You're right on track, though. Just like the mouthpiece of a musical instrument, the horn you attach makes a big difference in the timbre, tone, and quality of the sound.

 

[65shad]

I just ordered the new 2" reproduction trumpets for my 65 convertible. When I have them installed, I'll let you know if they change the tone. I am just getting them because I think they are the coolest looking exhaust ever put on a car. I'm not anticipating much of a change in sound, but who knows.

 

[robbinsj]

Thanks guys! I'm going to check with Magnaflow regarding resonators. 65shad would really like to know how the tips sound once you install them. From what I've read it seems that one way to deepen the exhaust sound is to have the outlet larger than the inlet. Dual tips may do just that....
-Joey