Automotive muffler quieter?

[Bruker 2]

Has anyone here ever adapted a small automotive muffler to help quite a small engine? I've got an older 8hp Briggs that I'm trying to quiet down.

[HubbardRA 19]

I can't say positively, but the automobile muffler should be quieter than the smaller tractor mufflers. Usually the longer the gases are flowing around through the sound dampeners within a muffler, the quieter it will be. The larger the muffler, usually the more dampening mechanisms it has internally.

[PatRarick 1]

If the muffler is small enough, it will be quieter. Once you hit a certain point, the muffler can become an "echo chamber". It's a little quieter, but there's more of a throb to the sound that remains.

[richp 0]

Would A car muffler cause a restriction to the point it would consume power? I wondered this myself. As I get older, I like quiet machines.

[HubbardRA 19]

Rich, a car muffler is made to flow much more volume of gas than a garden tractor muffler. With the much lower volume of gas flowing thru it, the restriction would actually be much lower, a lot more room for the gas to flow.

[ehertzfeld 1]

Well I can tell you from experiance that auto mufflers on small engines, really don't make that much different. In my service truck, my compressor is a 13hp Kohler with a small car muffler. It's just as noisy as my tractors are.

[BLT 725]

You need to know a couple of things for good exhaust silencing, exhaust flow expressed in CFM and the maximum exhaust temperature along with the allowable backpressure so you don't burn off the exhaust valve. From that you can size a real good silencer. The draw back is they can be sizable and not cheap. Two good examples of good silencing are the 900 Series A-C with the Kohler KT and the 7100 series with the Briggs 16HP, along with the Kohler 16HP. They both offer good silencing however they are not real small. Thee harder you work the engine the quieter is seems to get and that is good design. Like Pat said, if you oversize it, bigger diameter muffler tube openings then what is on the engine, it will sound like a bunch of gerbils running around with ball peen hammers.

[builder386 0]

That might be the best thing I've heard about my 917's KT17 since I bought it!!!:D:D

[MrSteele 495]

I like the sound of a straight pipe, but we are getting a new kid in the house soon, and I have already been told that there will be some kind of muffler on the Landlord, or She forgot to tell me "or what" But, I have a feeling it means use a muffler or use a pair of scissors to cut the yard! I have a glass pack on my Briggs ZZ for a while, and, except for the thump you would expect, it ran a LOT quieter, guess I'll have to get one for the Landlord.

[stumpy 0]

I've run an IH-1 muffler stack vertically mounted with a rain-cap on my B-112 and on my "Angle-and-Channel Cascade 10" It changes the tone on both the cast iron Briggs 12 and the big ol' Wisconsin AENL...gets the exhuast up and away from me, and I kinda like the "tink-a tink-a tink-a" of the rain cap at idle. The set up is the smallest stock one that an IH-Case dealer will carry...think it's the one that goes on a Farmall Cub. Clamps right down on a chunk of 1" diameter galvanized pipe perfectly. the last one I bought was about 18 or 19 bucks (three years ago)...the rain cap to fit it was another fiver or so....that was at St. John Tractor and Implement near Spokane, WA Pretty sure the actual part number is "IH-1." Cheap, easy to install (on a larger horizontal-shaft one-lunger anyway), looks like a real tractor, and sounds cool....all in all one for the plus side, in my humble opinion anyway. Good Luck

[ehertzfeld 1]

Yeah IH-1 is the part number. I have two. You can get them at Tractor supply as well. I think I paid $30 for that one. If you want to quiet down an engine, they are not the best muffler to get. I love the looks and they do sound great, but they are on the loud side. I even tried the screen mesh trick, and that didn't help at all. My neighbors are used to it now.:D

[stumpy 0]

Elon, Yup....I used the steel-wool and mesh trick once. Helped, but not much. The stack is a lot better on the old AENL Wisconsin than on the cast iron Briggs. Not super quiet, though. The old one-lungers with a stack are rather like an AK-47 (to quote an eminent philosopher), they "make a distinctive sound when fired..."

[FastPaul 0]

This is an old post , This muffler is very quiet but has a very nice deep sound http://www.simpletractors.com/club2/topic.asp?TOPIC_ID=72932

[ehertzfeld 1]

quote:

---

Originally posted by FastPaul
This is an old post , This muffler is very quiet but has a very nice deep sound http://www.simpletractors.com/club2/topic.asp?TOPIC_ID=72932

---

Ya know Paul, I just mite have to try that. I have a few of them hanging around doing nothing.:D

[RedbarnRick 5]

Try a Kawasaki muffler they are real quiet and they have several that could fit.