Is there any way to make a two stroke have an exhaust that doesn't sound like the offspring of a chainsaw and a hive of bumblebees? Maybe like, put put put? Not YEAANNNN YEAANNNN YEAANNNN?
Exhaust sound
- Thread starter frozenveinz
- Start date
Not much. The laws of physics will only let you do just so much to change the sound of a single cylinder 2 stroke engine. Expansion chambers, megaphones, even motorcycle type mufflers are still going to have that characteristic sound. A longer pipe will soften the crack and ring-a-ding noise but because of the inherent high RPMs you'll still know it's a 2 stroker.
Tom
Tom
I see. But does that mean a two stroke at 5k rpm sounds like a four at 10k? Or does the valved exhaust of a four produce a different sound?
That's probably not a bad comparison except 10K for a normal 4 stroke would be really pushing it.
The fact that you have twice the number of compression/power strokes with a 2 cycle verses a 4 explains the sound difference. Your 5K to 10K concept is valid.
There is a difference in the restrictions of the exhaust path with valves (4 stroke) as opposed to an open exhaust port (2 stroke) and it undoubtedly accounts for some difference in the noise they make.
Tom
The fact that you have twice the number of compression/power strokes with a 2 cycle verses a 4 explains the sound difference. Your 5K to 10K concept is valid.
There is a difference in the restrictions of the exhaust path with valves (4 stroke) as opposed to an open exhaust port (2 stroke) and it undoubtedly accounts for some difference in the noise they make.
Tom
Hi 2Door, I got a question about exhaust sound in the opposite direction of what frozenveinz is asking. Looking to quite the engine beyond that of what a stock muffler does.
Do you have any recommendations of type and brand. Plus maybe a ratio of quiteness to loss in hp? In this I will be looking to lengthen the exhaust pipe to reach the rear of a Stretch Cruiser Z2. Which I understand will have some effect on the produced sound also. Should mention, I'm working with a HF Pedator 6.5.
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Kiwa,
Lenghtening the pipe will alter the sound. I use 3/4" EMT, electrical conduit, to build my pipes and weld the stock muffler out on the end. They're quiet and seem to have little to no effect on power. I like to have the muffler behind me so that puts it back near the rear wheel. You can check my profile/album for some photos of my pipes.
I never use the catalytic converter type of muffler. Just the chrome standard one that comes with most of the earlier kits. I use a TIG welder but if you're good with a MIG, that will also work.
Tom
Lenghtening the pipe will alter the sound. I use 3/4" EMT, electrical conduit, to build my pipes and weld the stock muffler out on the end. They're quiet and seem to have little to no effect on power. I like to have the muffler behind me so that puts it back near the rear wheel. You can check my profile/album for some photos of my pipes.
I never use the catalytic converter type of muffler. Just the chrome standard one that comes with most of the earlier kits. I use a TIG welder but if you're good with a MIG, that will also work.
Tom
You respond faster than I can read. Thank you buddy! I was just reading deeper into these threads under Carburators and Exhaust. This where I'd just caught your further notes on which you are telling me here. Loved the outcome of your Stainless Steel. Also caught the point of the use of glass packs back in there. This though I hadn't dug further into the use of glass packs and setting them up. Stopped and ordered an electric start kit match up to the gx200, for the Pedator 6.5 hp. This when my notice of your responses to me came in.
Not sure the the difference would prove unsurmountable? But I still chip slag.
I've been electric arc welding for 43 years now. Never did learn to Tig or Mig. Until joining this forum over a year ago, I'd only observed it being used around me. But until joining here, I hadn't read the finer points on them. But now have all the PDF's on either. Till Harbor Frieght, never thought they were affordable. But I have an Arc welder here, along with cutting torches and know how to cut and braze also very well. If you know a reason why arc welding would not surfice, I'd like to know more?
With 3/4" EMT it will shrink the exhaust port size. As it is 1 inch ID. Though the stock muffler is already shrinking it, as it's 5/8 ID, 7/8 OD. I believe I saw it mentioned in the thread where I saw your stainless exhaust. Someone mentioned 1 inch of the same stainless? Matter of fact, in that thread you'd mention and showed pictures of both types you'd used. One had a homemade flange, that one was other than stainless. But the stainless one I cannot get around, as it was quality in excellence in workmanship. Superior to retail for sure! Exactly what I'm shooting for. Hopefully I'll make it there. Either way, other than possibly using the flange off the Stock muffler ~ is going bye, bye. Looking for something quieter and eye pleasing.
I can draw a tight bead in a flawless flow. But around an object of course you have to stop adjust the object, but even still. This along with slag removal and clean up and buffing? I have no problem with spending the extra time. If one thing I got, is time. Like most I've seen here at the forum of the ole timers like myself, I got the dremel 4000. With about 300 to 400 different attachments. Including all the diamond point bits, drill press, and rotary cabled pencil point attachment. For the bigger jobs, I got a Skil Pro variable speed and reversing 3/8ths high speed drill. With maybe as many attachments as the dremel. Disc Sanders, belt sander, all but need to get a new bench vise. Otherwise I believe I'm pretty well stocked up on needed tools.
I have a very large electrical and plumbing supply house about five blocks away from me. Very close and convenient. Or six blocks the other way an Ace Hardware. So it seems your work on the stainless has won me over, lock, stock and barrel!
Not sure the the difference would prove unsurmountable? But I still chip slag.
With 3/4" EMT it will shrink the exhaust port size. As it is 1 inch ID. Though the stock muffler is already shrinking it, as it's 5/8 ID, 7/8 OD. I believe I saw it mentioned in the thread where I saw your stainless exhaust. Someone mentioned 1 inch of the same stainless? Matter of fact, in that thread you'd mention and showed pictures of both types you'd used. One had a homemade flange, that one was other than stainless. But the stainless one I cannot get around, as it was quality in excellence in workmanship. Superior to retail for sure! Exactly what I'm shooting for. Hopefully I'll make it there. Either way, other than possibly using the flange off the Stock muffler ~ is going bye, bye. Looking for something quieter and eye pleasing.
I can draw a tight bead in a flawless flow. But around an object of course you have to stop adjust the object, but even still. This along with slag removal and clean up and buffing? I have no problem with spending the extra time. If one thing I got, is time. Like most I've seen here at the forum of the ole timers like myself, I got the dremel 4000. With about 300 to 400 different attachments. Including all the diamond point bits, drill press, and rotary cabled pencil point attachment. For the bigger jobs, I got a Skil Pro variable speed and reversing 3/8ths high speed drill. With maybe as many attachments as the dremel. Disc Sanders, belt sander, all but need to get a new bench vise. Otherwise I believe I'm pretty well stocked up on needed tools.
I have a very large electrical and plumbing supply house about five blocks away from me. Very close and convenient. Or six blocks the other way an Ace Hardware. So it seems your work on the stainless has won me over, lock, stock and barrel!
Kiwegapawa
if you want it quite you need a real muffler not the tiny thing for a b&s
like this one
http://www.ebay.com/itm/JMSTAR-Eagle-150-Scooter-Exhaust-Muffler-/140667455214#vi-content
if you want it quite you need a real muffler not the tiny thing for a b&s
like this one
http://www.ebay.com/itm/JMSTAR-Eagle-150-Scooter-Exhaust-Muffler-/140667455214#vi-content
Thank you Ibedayank. As it was too late to act today on your help. I was able to get a contact number from eBay to the seller. Always amazes me to find those parts for sale, there photo'ed displayed in all their glory, without any specification.
You know, like length, diameter, ID err OD. But, I'll be calling them Monday to find out the specifics. As what eBay had listed for the seller, they are only open on the weekdays.
Again, thank you very much for the heads up.
Dang, Looks like I got my Crosses Wired. There in miss read what you said. That's the one "NOT" to get! LoL,, Opp's, LoL , Welcome to my world!
You know, like length, diameter, ID err OD. But, I'll be calling them Monday to find out the specifics. As what eBay had listed for the seller, they are only open on the weekdays.
Again, thank you very much for the heads up.
Dang, Looks like I got my Crosses Wired. There in miss read what you said. That's the one "NOT" to get! LoL,, Opp's, LoL , Welcome to my world!
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Wow, 18 inches by 5 inches and doesn't quite a single cylinder?.
I remember Thrush mufflers of the same size on a V-8 that did a pretty good job. If I'm catching what your saying right, it must be there is bearly a baffle in it?
MufflerWow, 18 inches by 5 inches and doesn't quite a single cylinder?.I remember Thrush mufflers of the same size on a V-8 that did a pretty good job. If I'm catching what your saying right, it must be there is bearly a baffle in it?
Replaces Briggs 299477/391569
Fits models 251412, 251416, 254422, 254427 and 283702
For 8 and 16 HP horizontal cast iron engines
4 3/4" pipe length
1" pipe thread
Part# 105254
Our Price: $24.95
Qty:
yeah id say its MUCH BIGGER than a stock briggs muffler
somebody inform me where i said this muffler would not make a 212 pred lot quiter than the stock muffler or a muffler for a B&S aka briggs and stratonKiwegapawa
if you want it quite you need a real muffler not the tiny thing for a b&s
like this one
http://www.ebay.com/itm/JMSTAR-Eagle-150-Scooter-Exhaust-Muffler-/140667455214#vi-content
Here's how I read it the second time before you posted the dimensions, here below.
Sorry bout that Ibedayank. But I get McFused easy.
During this last week, as we started speaking on this Exhaust topic, PetSmart caught me with a Red Tiger Oscar hot potato. Sold me a diseased fish, which I had to pump out a large sum of unexpected money for the meds and new substraights. So my bike money can only go in one direction this month. For the custom built springer I've already ordered. If things go well the rest of the month, I'll be able to order the muffler after the first week of April. But I'll call Monday anyway to see if it'll be there at that time. It's really strange, with all the customer lowrider parts out there. There isn't diddlie out there in that type custom exhaust systems. Checked them all and only a few here and there that did not catch my eye (even Motorcycle and Scooter pipes.). This why and where of the DIY becomes so important. Once again Ibedayank, my thanks to you!
That muffler from ebay that was posted is actually the exact muffler on my 200cc motorcycle. It is pretty quiet.
I called on Monday, spoke to the Lady of the business. She said they'd still be carrying the part when I was ready to buy. She said the ID on the inlet and outlet looked to be about 2cm to 2.5 cm.
She gave me their URL, PartOutlet.Biz
Prolly is the same one Ddesens.
Got talking to her about where I had heard of them and this muffler. She got real interested and mentioned that they may even open a member profile here. As I had told her, there were other venders and businesses here at the MB Forum. Gave her my ID and who turned me on, to what I was looking for. When I spoke about my HF 212cc. She got real interested then. Mentioned looking into picking up the line for their shop. Just havta see if they turn up here. Once again, Thank you for the resource IbedaYank. I never rated a I bedayank. It was always, DamYankie
Prolly is the same one Ddesens.
Got talking to her about where I had heard of them and this muffler. She got real interested and mentioned that they may even open a member profile here. As I had told her, there were other venders and businesses here at the MB Forum. Gave her my ID and who turned me on, to what I was looking for. When I spoke about my HF 212cc. She got real interested then. Mentioned looking into picking up the line for their shop. Just havta see if they turn up here. Once again, Thank you for the resource IbedaYank. I never rated a I bedayank. It was always, DamYankie