SuzukiSavage.com - Homegrown Exhaust Question

rat907

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Homegrown Exhaust Question
02/20/13 at 16:22:15

I had been toying with the idea of replacing that big 4 inch tube Suzuki put on as a muffler with a home made straight/drag pipe and turn down tip. This will be a total homegrown operation using a 1-7/8 X 18 inch exh. pipe and turn down from the auto parts store.

A concocted plan for getting the back pressure is to pack the exh. pipe with steel wool scrubbing pads to create the resistance of the flow, a baffle insert is out of the question.

My question is about BACK PRESSURE and HOW MUCH is needed not to burn the valves out?

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Denny

2005 Suzuki S40 Boulevard, Lancers VM 36 Carb Kit & Thrush Glass Pack... Zoom Zoom!

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28678 Tucson Az Gender:	Re: Homegrown Exhaust Question Reply #1 - 02/20/13 at 17:14:01 7.... an amount of 7... ... ...you can't just stuff packing in the tube, you know?... You need a baffle chamber in the pipe... Just stuffing a pipe with steel wool,.. will either make the bike not start, or it will turn the pipe into a flaming wool cannon... ... So,... the baffle is back in the question... you need one...
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Homegrown Exhaust Question Reply #2 - 02/20/13 at 17:39:08 Dude, yes, the trashcan Suzuki put on sux, your proposed answer? Mite just suck more, it6s gonna be a close race.. Save yourself some time & hassle & slap a Dyna muffler on it.
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ZAR

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Re: Homegrown Exhaust Question
Reply #3 - 02/20/13 at 21:54:52

justin_o_guy2 wrote on 02/20/13 at 17:39:08:

Dude, yes, the trashcan Suzuki put on sux, your proposed answer? Mite just suck more, it6s gonna be a close race..

Save yourself some time & hassle & slap a Dyna muffler on it.

Gotta agree with Sero and JOG....without baffling of some type the steel wool will blow out,hopefully not flaming as it hits the State Police cruiser right behind you! Yep! That's right. I witnessed that several years ago when a buddy tried that fix.

As cheap as you can get the Hurley Dyna-flow muffs (brand new take-offs many times!)from shops that do the Screaming Eagle conversions it's the only way to go.

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Yellow 1996 Jetted and Dunstall exhaust. Dakota Chubby Bags, Memphis Slim shield,Tank Bib from?? Seat riser mod. More to come!

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Cavi Mike Serious Thumper Offline Thumper n00b Posts: 1005 Rochester, NY Gender:	Re: Homegrown Exhaust Question Reply #4 - 02/21/13 at 13:59:12 Contrary to popular belief, exhaust gas does not go though the stainless matting in an exhaust. The matting is contained between the exterior shell and a perforated inner pipe. The exhaust flows through the perforated inner pipe and the matting absorbs sound waves. edited a typo
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teabowl13

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Re: Homegrown Exhaust Question
Reply #5 - 02/21/13 at 14:22:55

These are not "Home grown" but they are darned cheap for what you get. If the smallest one is only 9" and it's $13...

http://www.summitracing.com/search?keyword=1.75%20in.%20glasspack&dds=1

You'll need something to give you the correct backpressure for sure.
Not sure if you read Kalifornia John's post, but someone there suggested googling "lollipop exhaust" That's another functional, home made way to get the same results...

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Millerman

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Re: Homegrown Exhaust Question
Reply #6 - 02/21/13 at 14:51:55

You know I've been running a dyna exhaust with no baffle all last season no problems. If you think about it hows it any different from a 4 stroke dirt bike with aftermarket or even stock exhaust with no baffle. I would say running a baffle or not is all how you want to tune your engine for which band of power it will run better but not running one isnt going to hurt anything.

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ZAR

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Re: Homegrown Exhaust Question
Reply #7 - 02/21/13 at 17:58:24

Millerman wrote on 02/21/13 at 14:51:55:

You know I've been running a dyna exhaust with no baffle all last season no problems. If you think about it hows it any different from a 4 stroke dirt bike with aftermarket or even stock exhaust with no baffle. I would say running a baffle or not is all how you want to tune your engine for which band of power it will run better but not running one isnt going to hurt anything.

I agree MM but Denny was talking about using only straight exhaust tubing and trying to baffle it with steel wool. That's where his problems will begin. Has to be a controlled flow of exhaust gas to work.

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Yellow 1996 Jetted and Dunstall exhaust. Dakota Chubby Bags, Memphis Slim shield,Tank Bib from?? Seat riser mod. More to come!

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A-Bolt YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 31 Vegas Baby Gender:	Re: Homegrown Exhaust Question Reply #8 - 02/21/13 at 20:41:28 Denny a guy on Graig list had some shot gun pipes for 80 bucs in vegas. Any 1.75 ID will slip on.
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A-Bolt YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 31 Vegas Baby Gender:	Re: Homegrown Exhaust Question Reply #9 - 02/21/13 at 21:41:19 here the link:http://lasvegas.craigslist.org/mcy/3627016748.html one for each of us, havsees if there 1.75" ID you from alaska ? your bike might sound like a harley , you don't want that. damm those would look cool
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