Quite Muffler

[OneTimeUser]

Tillotson 212; 24mm Nibbi, stock innards. I've got a garden variety exhaust with a hot dog muffler. Runs great but is NOISY. Scares the deer.

Any ideas for a quieter muffler that won't rob too much power?

Thanks in advance.

 

[Hellion]

Are you using a genuine Briggs 294599 type or one of those Chinese copies? The Chinese copies screw-on but have no center seam and are more blingy. Never seen inside one of those. I wonder if that rainbow coating survives the heat…

I think someone here used two hot dogs welded together and doubled their fun. Be great if they came threaded on both ends.

The hot dog muffler quiets down the customary straight pipe header a good bit. Puts an end, largely, to the brappiness and if you didn’t re-jet, the backfire or I should say the poppety-pop-pop afterfire. The hot dog is a glorified spark arrestor… Even the box mufflers on riding mowers are loud.

You’re going to have to go bigger and more car like. A oval muffler with a chamber(s) and partitions?

 

[Sparkwizard]

Go to any parts store. Buy an 18 inch tail pipe evtension that will slide onto your muffler. get some hardware cloth. Roll a piece of that into abour a 1 inch tube the same length as the tail pipe piece. Wrap fiberglass insulation around the hardware cloth and slide in into the tail pipe. Drill a hole and use a screw to retain the baffle. It will be much quieter with no added restriction.

 

[OneTimeUser]

Go to any parts store. Buy an 18 inch tail pipe extension that will slide onto your muffler. get some hardware cloth. Roll a piece of that into abour a 1 inch tube the same length as the tail pipe piece. Wrap fiberglass insulation around the hardware cloth and slide in into the tail pipe. Drill a hole and use a screw to retain the baffle. It will be much quieter with no added restriction.

Thanks for this. I'm having a bit of trouble envisioning what you propose. Will you grace me with a picture please? I like the idea, but am drawing a blank on exactly what it is I'm looking for.

Many thanks in advance...

 

[Denny]

What is hardware cloth? I never heard of it.

 

[ezcome-ezgo]

Hardware cloth is quiet the material.

 

[Sparkwizard]

Galvanized wire fencing. It has 1/2 inch square holes in it. It is used for small animal enclosures, garden fencing.

 

[Edwin Spangler]

Hardware cloth is quiet the material.

I see what you did.

 

[Hellion]

So: a rolled single layer of hardware cloth mesh, a layer of fiberglass insulation wrapped around it, with the tailpipe extension over the whole shebang? I think the smallest diameter tail pipe is around 2” or so, and really, you don’t want to go smaller.

Got pictures of yours, Spark?

 

[Sparkwizard]

I think those screw in mufflers are 1.75 inch. Those tailpipes come in 1.5, 1.75, 1.875, 2, 2.25 , 2.5 and 3 inch diameter.
Get the one that fits your muffler. I do not have one at the moment, but there is nothing fancy about it.

 

[Sparkwizard]

Once the pipe is installed, the baffle can be removed and it will have an awesome rumble/ echo burbling sound. With the baffle installed, it has a much quieter almost puffing noise. Support the pipe. Don't just hang it on the muffler.

 

[Denny]

1950 Chevrolets had the quietest mufflers in history! Find one of those.

 

[Master Hack]

I have been on a quest for a quiet muffler also, that is quite a dillemma. Automotive mufflers might be quieter but the size and weight pose quite the quandry. I have decided to give this one a try. They claim it is mo quiet and was quite easy to order.
with that its time to quit all this BS.

https://www.ebay.com/itm/287328220681

 

[Hellion]

Cool beans, Hack. Adding the pic from the link. Hate it when links go dead.

 

[Whitetrashrocker]

The crowd went quiet when they realized it was quite unsafe for the racer to quit the track so suddenly. It takes quite a lot of skill to quit at quite the right moment, keeping the engine quiet and avoiding a quite nasty crash. Though he had to quit the heat, he was quite glad for the quiet pit lane, knowing he didn't quit the sport—just a quite chaotic race that refused to stay quiet.

 

[Sparkwizard]

That was quiet well stated.

 

[65ShelbyClone]

The Chinese copies screw-on but have no center seam and are more blingy. Never seen inside one of those.

I have one and it looks super restrictive. It's a perforated core run through the can and there is a solid washer welded inside so the exhaust has to go completely thorough the perforations twice. It's closer to the outlet so there aren't very many perforations to exit through.

Inlet:


Outlet:


Concept:

 

[OneTimeUser]

Thanks for all the help and Ideas.

 

[65ShelbyClone]

As far as controlling noise, mufflers are subject to the choice triad of size-performance-muffling where you can only pick two. Good flow and good sound reduction will require a large muffler.

I would look at something like a small 1.5" ID tractor muffler with a reducer to fit the header/exhaust pipe. It would probably require a support bracket of some kind. My local Tractor Supply had them on clearance a while back, but I didn't have a use for any at the time.

 

[Hellion]

Thanks 65ShelbyClone for the info and the illustration. It appears the 'bling bling' Chinese copy is way more restrictive than the Briggs & Stratton 294599. They both have the partition affixed in the center bore (the spark stopper) but at least the Briggs has lots and lots of holes. They’re spaced evenly, like the space between holes is the size of one hole.




I’ve blown air through the Briggs hot dog and they flow quite freely (as if that was a proper test).

People here or on OMB forum have drilled or knocked out the partition and I think once that is done, the two halves can be pulled apart and fiberglass added, then reassembled. I think someone did that, but there was no video or proof of noise reduction.