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MG TD TF 1500 - dual exhaust muffler needed

Little did I know when I responded to the post regarding the dual exhaust manifolds just a few days ago that the muffler I have on my dual exhaust system had been rusting out and parts inside finally collapsing so as to prevent exhaust from exiting at anything beyond an engine idle.

Thus, I'm looking for a replacement. More difficult than I had expected. The current muffler (see attached photo) does not have a manufacturer's name, only the numbers, M1219 900349. The canister is 23" long and 6" in dia. with 2" dia. in/out feeding into 1.5" dia. pipes.

I have been searching the internet with little success, and the header shop who did the original work said it would be "near impossible" to look through invoices dating back to Feb., 2011 when the work was done, to find the manufacturer's name.

Any suggestions in locating a muffler that will work with the system I have for my '54 TF would be greatly appreciated.

John Brickell

John,
You're probably not going to find the exact inlet/outlet, or length, but there are quit a few out there. I found one (stainless)on the Flowmaster on line catalogue. You will have to use adapters to match up the pipe sizes. I doubt if you will find the exact fit.

Steve
Steve Wincze

Also found one in the DYNOMAX on line catalogue
Steve Wincze

Steve -- thanks for the info, I will follow up on the manufacturers that you have suggested. I'm sure you're right that I'm unlikely to find a perfect match. I'm looking into several different options.

Thanks again -- John
John Brickell

John,

If have the skills and tools you could buy the parts and build your own. Or choose a recommended fabricator from their list. Unfortunately there are none located in Washington.

http://www.coneeng.com/mufflers.html

Dan
Dan Nordstrom

If you want your engine to perform its best, I would recommend joining the two pipes after the downpipe and running a single pipe under the car. Inline 4-cylinder engines typically don't like dual separates. Smoother and better power with a single pipe, which is why the cars came that way. The engineers who designed the system were no dummies!
Steve Simmons

Steve -- Along with a similar suggestion from LaVerne I am now leaning in that direction. Thanks for your input and I will let the good folks on this BBS know what I end up doing. Just an aside, but the sound of the TF running without any muffler is a sound that is quite enjoyable to my ears at least.
John Brickell

John Not sure of the authenticity of this statement however a long departed mechanic mate told me you can do valve damage running without a muffler. His thoughts, no back pressure compromises exhaust valve closures.

Graeme
G Evans

I'm surprised it failed so quickly. It isn't that old. I would probably go for the joined pipe. If you like the noise you could go the route I did and just use a resonator (aka cherry bomb).

Alex
Alex Waugh

Replace that Midas Muffler hack job with a stainless factory spec system. When I replaced mine the engine ran 5*C cooler, same day, same test route. My 'better' 2 pipe system was causing too much resistance.

Sounds like a classic MG now too.

...
MAndrus

Graeme -- Thanks for the stated concern. I've run the TF without muffler for only about a total of four blocks, just to test that the engine would run okay after taking the muffler off. I'm not running it again until a new muffler is installed.

Alex -- Good to hear from you good buddy. Yes, I agree at being surprised that the muffler the header shop installed crapped out with only a little over 6,000 miles on it. Maybe sitting too long and mostly shorter drives added to the early rusting out.

All others -- Thanks for your input, and as always much appreciated on this great site for helpful and informative information. I will follow up on what system finally gets installed, but now leaning in the direction of y-piping from the two exhaust pipes into one, then to muffler, then having a single exhaust pipe out the back.
John Brickell

I've never heard the one about valve damage. Seems far fetched. The story I always heard back in the day was that running without any pipes would let cold air back in after a hot run, and this could warp or crack the head. I used to do it on my MGB as a teenager because it sounded like a fighter plane. I don't think my neighbors agreed.

On my TC I run a glass pack and it sounds wonderful to my ears. Just noisy enough without annoying anyone.
Steve Simmons

Steve,

I have the same set up on my TF. It is a 24" glass pack and I had them install it with the louvers facing backwards. It is supposed to make the packing last a bit longer and give it a bit more sound. I am rather fond of the "racket" it makes. The idle sound is really neat too: like it is really ready to explode from the chocks.

Alex
Alex Waugh

This thread was discussed between 22/08/2015 and 23/08/2015

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