Automotive Muffler used on a tractor?

I have a Ford 335 industrial tractor with the 3 cylinder gas engine, and a vertical exhaust. Even with ear plugs and earmuffs, I feel like it's still pretty loud. The muffler is brand new, but it's one of those straight-through kind of mufflers, so I don't expect it to quiet it down much.

Thought about converting it to run under the tractor, but I don't want to put that much time and effort into it.

Any significant drawbacks to getting a auto muffler at Farm and Fleet, and mounting it vertical on this tractor? I imagine the back pressure would be a little higher than the OEM muffler, but at the same time, I only use the tractor for bush hogging and some light loader work, so I'm not putting a lot of strain on the engine.

Gotta think others have done this in the past?
 
I would think the oval mufflers original on some of my tractors would be the rough equivalent of an automotive muffler. They sure do help on a gas engine. There's enough engine noise with a diesel that I still wear ear protection.

AC D15II gas with OEM oval muffler. AC 175D and JD 2520D with OEM oval mufflers.

I remember with the D17 from the early round muffler to the later oval muffler there was a profound difference.
 
It will help a bit but 3 cylinder engines tend to be inherently loud anyways, as
compared to 4 or 6 cylinder of the same manufacturer.

Ben
 
As Bod indicated below, the OEM type oval muffler is considerably quieter than is the aftermarket round type.

It is also more expensive.

Dean
 
The best I found many years ago I pulled a PINTO muffler in the junk yard. It
fit perfectly, nice and compact and wow was the engine ever quiet. Go to a U-
pull it yard and grab a Honda-Kia-hundai- mini- or some other little car
muffler. You will not believe the difference. The stupid fan makes more noise
than you know!
 
I have the same tractor,(335) and as Dean said, OEM oval is much quitter.

Comes with 45deg.and bologna cut extension so no rain cap
Needed.

Tom
 
(quoted from post at 17:34:02 09/12/19) I am planning to put one on my MH44 EFI, it is way too loud,


I'd be curious to know if your fuel map will change with a more restrictive muffler. unc
 
I remember many years ago running an old car oval mufflr on a Cockshutt 40. Worked after dark and I could see the end plate of the
muffler was glowing red. I guess it was quieter. Can't remember. Nowadays I wear foam ear plugs on all equipment. Even the quiet
ones.
And yet I see guys taking the mufflers off newer tractors and running with a chrome straight pipe because its "cool". Shaking my
head.
 
That is a good comment, I can run before and after logs, The 44 came out about 9:1 compression, it really barks.
 
I recently bought a commercial truck muffler and put on an M. Made a big difference and really took the "bark" out of the exhaust.

It's round like a tractor muffler and made out of 16 gauge aluminized steel. It has two chambers and a baffle but you can see light around the baffle. It is made by Walker and they have several different lengths. I bought mine from Summit. It's well made but they spent zero time on looks since it was supposed to be hidden under a truck. It doesn't look worse than anything else I own.

I did have to use a short piece of tubing as an adapter for the size difference between the manifold pipe and muffler inlet. I also added a piece on top for height.

In any case I'm totally done buying "tractor" mufflers as any more they are made out of paper thin metal and just don't hold up.

Not a great picture but you can get an idea what it looks like.

cvphoto36324.jpg
 
The only problem I see would be the weight.

Don't want a lot of stress on the manifold from a heavy muffler bouncing back and forth.

Other than that, it should flow just fine, maybe even easier.
 
They have a shorter and a longer one. I somehow googled up a chart from Walker for that muffler series that broke down the different sizes. I think I paid $45 for that one.
 
I have one on my swather which
uses the same motor as the
case 4/530 and it works fine
and is very quiet. Don't see
why it wouldn't work.
 
The closer you can put the muffler to manifold the less stress it puts on a manifold. Another thing is having the longest piece of pipe possible after the muffler that you can also make it quieter. There is also a thing as a muffler with too much airflow for the size engine it's on. A more restrictive automotive muffler can actually increase air velocity in the exhaust system so instead of just having the piston pushing the exhaust gas out on the exhaust stroke the increase in air velocity can help suck out more exhaust gasses, and help draw in more air (and fuel with a carburetor) when the exhaust, and intake valves are in overlap. Which in turn helps the engine make more power.
 
(quoted from post at 23:24:27 09/12/19) The closer you can put the muffler to manifold the less stress it puts on a manifold. Another thing is having the longest piece of pipe possible after the muffler that you can also make it quieter. There is also a thing as a muffler with too much airflow for the size engine it's on. A more restrictive automotive muffler can actually increase air velocity in the exhaust system so instead of just having the piston pushing the exhaust gas out on the exhaust stroke the increase in air velocity can help suck out more exhaust gasses, and help draw in more air (and fuel with a carburetor) when the exhaust, and intake valves are in overlap. Which in turn helps the engine make more power.
ull
 
(quoted from post at 21:17:38 09/12/19)
(quoted from post at 23:24:27 09/12/19) The closer you can put the muffler to manifold the less stress it puts on a manifold. Another thing is having the longest piece of pipe possible after the muffler that you can also make it quieter. There is also a thing as a muffler with too much airflow for the size engine it's on. A more restrictive automotive muffler can actually increase air velocity in the exhaust system so instead of just having the piston pushing the exhaust gas out on the exhaust stroke the increase in air velocity can help suck out more exhaust gasses, and help draw in more air (and fuel with a carburetor) when the exhaust, and intake valves are in overlap. Which in turn helps the engine make more power.
ull


It's been proven on a dyno on many engines so I don't see how it can be bull!
 
I have a what is called a quiet bullet that I bought from Muffler Man. it is about 3 -4 inches in diameter and about 18 to 24 inches long. they welded the necessary adapters on it to fit my manifold on my Farmall BN. the top of the out let pipe is just level with my head as I am on the seat. Quiet YES I can stand beside the engine and talk in a normal voice or even sit on the seat and do so. cost about $50.00 Canadian. no problem with power or operation of the engine. It has two chambers and no light can be seen while looking from one end with a light at the other.
 

For a low cost muffler with maximum sound deadening . Search for AP muffler maximum on the Summit Racing Site .

https://www.summitracing.com/search?keyword=Muffler%20maximum%20quiet&gclid=EAIaIQobChMIwcrM39bN5AIVF47ICh2eIQydEAAYASAAEgKkM_D_BwE&SortBy=DisplayPrice&SortOrder=Ascending&page=2
 
How much exhaust scavenging do you expect from a three cylinder, slow speed industrial engine?

Such effect is measurable on racing engines but not so on the OPs 3 cylinder Ford.

Dean
 
I used to have a D19 gas that needed a muffler. I had an old Flowmaster laying around with the correct size inlet/outlet. I had to put it on backwards to get it down through the hood, but had a real nice sound to it. It was pretty quiet, but had a nice deep mellow tone to it.
 
(quoted from post at 17:25:19 09/12/19) It will help a bit but 3 cylinder engines tend to be inherently loud anyways, as
compared to 4 or 6 cylinder of the same manufacturer.

Ben

I agree. The objectionable noise doesn't always come from the exhaust.
 
My experience has been "automotive style" mufflers don't hold up to the vibration of upright exhaust. I would bite the bullet and get the correct Ford muffler or equivalent, you will be money ahead.
 
Bingo.

Accordingly, any exhaust scavenging effect it irrelevant in this context.

Dean
 
Ford 2000; 3 cyl. gas.; 4/1 Trans.....I wanted a more quiet muffler since I live in a residential neighborhood so went to Meineki and got a round automotive unit that is offset internally to increase baffle effect. It very quiet but the top end of the muffler chamber is a cup shape about half inch deep instead of a dome shape so, if it gets rained on, that cup holds water. I suspect it will rust out and shorten the life of the muffler sooner or later. When I'm not using the tractor, I pull the muffler off, put a soup can over the exhaust pipe and then pull a tarp over the tractor.
 

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