In search of a quieter 2-in 1-out muffler...

[Churchill]

My targa has SSI's and a stock Dansk 2-in, 1-out muffler. It's louder than I'd like, especially since the car rarely gets driven without the top off. And the tone (raspy and metallic) leaves much to be desired IMHO compared to a Leistritz (deeper and more mellow). I've searched here and elsewhere but haven't found anything on this. Anyone know if there's a way to make a Dansk sound like a Leistritz?

[Jim Breazeale]

My targa has SSI's and a stock Dansk 2-in, 1-out muffler. It's louder than I'd like, especially since the car rarely gets driven without the top off. And the tone (raspy and metallic) leaves much to be desired IMHO compared to a Leistritz (deeper and more mellow). I've searched here and elsewhere but haven't found anything on this. Anyone know if there's a way to make a Dansk sound like a Leistritz?

Sure, just don't start the engine.
Sorry, I couldn't resist.

Ciao

Jim

[Richy]

Churchill , I agree , Dansk = raspy and metallic , but some people seem to like it . The mufflers sold by Porsche are expensive but quitter , much more Leistritz like , I bought one for my car .

[37yrold911]

what would happen if you tack welded some more plating onto the Dansk?

if the resonance is from the outer body of the muffler, you'd solve your problem at the expense of a wt. penalty (in about the worst possible place)

or try various mufflers and sell the ones you don't like

M&K or whoever makes that design now has some sound files on youtube if you want to try alisten before buying those

[skinnerd]

Churchill , I agree , Dansk = raspy and metallic , but some people seem to like it . The mufflers sold by Porsche are expensive but quitter , much more Leistritz like , I bought one for my car .

Richy: Can you elaborate more on the muffler you bought from Porsche. Is there a manufacturer name on it? What was the finish? For what year car? Any pics? Thx

[Churchill]

what would happen if you tack welded some more plating onto the Dansk?

if the resonance is from the outer body of the muffler, you'd solve your problem at the expense of a wt. penalty (in about the worst possible place)

or try various mufflers and sell the ones you don't like

M&K or whoever makes that design now has some sound files on youtube if you want to try alisten before buying those

I suspect the sound difference is due to the internal baffle design, not the thickness of the steel can. Not hard to cut the muffler open and perform surgery -- just not sure what's involved.

M&K doesn't make a quieter muffler, but Monty does. Monty is the turnkey solution, but they're sold out of Australia and are $1K+ delivered.

[sithot]

1- I want Jim's muffler.

2- A quiet Porsche is still a loud car and a Targa gives you the entire orchestra.

3- A Cadillac or environmentally conscious Prius are "auditory" friendly options.

They were all raspy in the days of old. There is nary a piece of fiberglass or sound deadening material to be found inside = mechanical baffles.

PS: I want Jim's mufffler

[37yrold911]

I suspect the sound difference is due to the internal baffle design, not the thickness of the steel can. Not hard to cut the muffler open and perform surgery -- just not sure what's involved.

M&K doesn't make a quieter muffler, but Monty does. Monty is the turnkey solution, but they're sold out of Australia and are $1K+ delivered.

rather than suspect, I'd measure - there are simple, cheap vibrometer apps for smart phones...

[62S-R-S]

Decibel reduction is a labor intensive exercise when suitable alternatives are not out there. Ex; a 928 grew very loud with age and the stock muffler. I knew it was going to be exhaustive to find something to replace it. A nice solution turned out that..

A ( 26") straight type...zig zag inner stainless tube, w/ 6" round diameter shell - performs better than the stock muffler did for sound. Honda Accord will beat it, but the bend promotes good sound absorption if the outer shell is at 6". The problem in your app is needing 2 into 1 ..but the overall width is a plus. I know you're looking for the part and to be done with it. The nice thing with stainless is a Mig will convert over and fitment issues for a bracket are feasible.

In practice...this can work quite well.

[Churchill]

Thanks all for your thoughts. I was hoping someone had done this before (quieted down a Dansk) but looks like not -- so I may just pony up for a Monty. Seems like a nice mellow sound.

https://www.youtube.com/watch?v=JvU0CiWLqNs