Muffler Dimension Question

[bajajoaquin]

I asked this question in my Imperial thread, so I hope you guys don't mind the cross-post.

When measuring the existing muffler for replacement, it came up as 2-1/8" on the ID of the inlet and outlet (or also the OD of the pipe that goes into the muffler). When I went online to buy a replacement, I found that they were available in 2" and 2-1/4".

Are mufflers measured to the OD of the inlet instead, or is it a 2" muffler that's been stretched?

 

[MrMoparCHP]

I think the muffler is sized to the pipe so a 2" pipe would need a 2-1/8" ID muffler, again I think.

Alan

 

[bajajoaquin]

For what it's worth, I think I just answered this question. Re-reading the TTI website (TTIexhaust.com), this is their description of the pre-bent C-Body system:

"Systems are constructed of 2.5" or 3.0" O.D., 16 gauge aluminized tubing to resist heat and corrosion damage."

Well, duh. Of course the measurement was O.D. Had I remembered that Tubing is structural, and therefore measured on O.D., and pipe is for transportation of fluid, and is therefore measured on I.D, it would have been obvious to me. Since exhaust is tubing, it's O.D.

 

[bluefury361]

Rule of thumb on exhaust systems is that inlet pipes will fit the ID of the componant it is mated to, and outlet pipes will fit the OD of the componant it is mated to.

 

[commando1]

BTW, a properly designed system always has slip fit connections. Never welded.
I don't allow welded connections on my systems. I'll pay extra.

 

[70bigblockdodge]

What ever you decide TTI or local DO NOT repeat DO NOT allow some lazy *** talk you into less than 2 1/4, 2 1/2 would be better nothing worse than somebody talking about all the parts they put on their car and then they have brake line dia tail pipes sticking out from under the bumper (stupid chevy jerkoffs) okay I'm done now just a pet peave.

 

[bluefury361]

What ever you decide TTI or local DO NOT repeat DO NOT allow some lazy *** talk you into less than 2 1/4,QUOTE]

OEM on Mopar HP exhaust from approx 62 through 72 was 2 1/2 into the muffler and 2 1/4 tailpipes. That worked in conjunction with the H-pipe,(balance tube), to allow a slight increase in torque. And unless your car came with chrome tips the tailpipes were downturned at the rear and barely visable below and forward of the bumper.
This had a lot to do with the distinct exhaust note the old mopars had.

 

[MrMoparCHP]

BTW, a properly designed system always has slip fit connections. Never welded.
I don't allow welded connections on my systems. I'll pay extra.

My system was welded, CHP requested that.

Alan

 

[70bigblockdodge]

I was just venting and lose respect for people who do this and don't take the time to find out what stock is and through their ignorance end up detuning the car torque converters and cam shafts are another place these people fail because they didn't research what was stock on a HP version of their similar combo, if they would take the time to ask or listen to a person like you that lived it instead of a magazine they would at least have a better starting point okay I'm done and I will get off of here

 

[commando1]

My system was welded, CHP requested that.
Alan

Interesting bit of trivia.
So the connections were welded up before being put into service?

 

[MrMoparCHP]

Interesting bit of trivia.
So the connections were welded up before being put into service?

Dodge did it at the factory.

These are the only two pictures I have without going and taking another.

Alan

 

[commando1]

Wow. They certainly kissed *** for CHP's contract...

 

[polara71]

What ever you decide TTI or local DO NOT repeat DO NOT allow some lazy *** talk you into less than 2 1/4,QUOTE]

OEM on Mopar HP exhaust from approx 62 through 72 was 2 1/2 into the muffler and 2 1/4 tailpipes. That worked in conjunction with the H-pipe,(balance tube), to allow a slight increase in torque. And unless your car came with chrome tips the tailpipes were downturned at the rear and barely visable below and forward of the bumper.
This had a lot to do with the distinct exhaust note the old mopars had.

and non HP duals were 2 1/4 from the manifolds out.

 

[70bigblockdodge]

My Challenger is 2 1/4 all the way original dual exhaust non hp, muffler and resonator car with turn down tips.


I'm sure all the car companys were kissing chps *** thats a lot of cars

 

[MrMoparCHP]

Every bit of the exhaust on this car appears to be custom. 2-1/2 to the muffler, 2-1/2 out, somewhere after the rear end they spliced it with 2-1/4 for the last couple feet of the tail pipe.

Other fabrication mods were a mounting plate for the siren and the sound hole.

and the other, less custom was to use the convertible spare tire mounting.

another one was to add retractable shoulder belts, I believe these were available in the trucks.
1969 was the first year for this and only the later cars had them. (and I need one of these loops)