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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 custom building exhaust
well im thinking bout tackling the process of building a custom exhaust and wondered if anyone has done this that has pictures of building it and what kind of things should be taken in account when figuring out how to set it up. also would straight pipes be a good idea? or should i put some sort of muffler on there like a motorcycle muffler?
i am going to be doing this for a 20 hp B&S im not really looking to amp up the speed or nothing i just have a rusted out muffler and figure it might be cheaper to just build me my own.
what are yalls thoughts and opinions?
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| Thu Jan 23, 2014 6:49 pm |
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Will C
MMT Sponsor
Joined: Fri Jan 10, 2014 1:16 pm Posts: 2107 Location: Gladewater TX
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 Re: custom building exhaust
I use the flanges from the original muffler then step it to 1 1/4. 2 to 1 style with bout 20 inch headers. Then mount muffler of choice on the backbone of the lt. Is your a lt? Ive used single glasspacks or dual stock sportster mufflers. The stock harleys are the quieter of the two The tubing u can order from jegs or summit. Ive never posted a pic on here before but i will as soon as i figure out how
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| Fri Jan 24, 2014 12:10 am |
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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 Re: custom building exhaust
ya its a longtail and alright ya i was debating on doing a 2 to 1 style or doing dual exhaust. just kinda which ever looks better and works.. dont need to go messing anything up. is there any pros or cons to doing a 1 muffler compared to 2?
and if you need help with posting a picture all you do is go to tinypic.com upload your picture on there then copy the source code that has the Img< code on the beginning of the code. once you copy that code just past it in here and it will work
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| Fri Jan 24, 2014 7:18 am |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm Posts: 4310
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 Re: custom building exhaust
There are several on here that have built their own. I have built several SS to mimic the stock one on my 36. Use the search feature and you will find all sorts of different designs.
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| Fri Jan 24, 2014 8:05 am |
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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 Re: custom building exhaust
ya i searched a few and it gave me some ideas but im curious if there is any difference from doing a dual muffler set up where its two small straight pipes to two glass packed or atv/dirtbike mufflers (which would be extremely easy to do) or doing a 2 to 1 where you pretty much make headers down to 1 glass pack muffler or dirtbike/atv muffler
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| Fri Jan 24, 2014 8:11 am |
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Will C
MMT Sponsor
Joined: Fri Jan 10, 2014 1:16 pm Posts: 2107 Location: Gladewater TX
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 Re: custom building exhaust
Pic is 2 harleys. Normaly a 2to 1 has a smoother sound. True duals are more "poppy". Having a little xtra length on your header increases torque. Hopefully this pic will attach
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| Fri Jan 24, 2014 9:17 am |
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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 Re: custom building exhaust
that thing looks sick! and ok so yours would be a true dual?
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| Fri Jan 24, 2014 9:26 am |
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Will C
MMT Sponsor
Joined: Fri Jan 10, 2014 1:16 pm Posts: 2107 Location: Gladewater TX
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 Re: custom building exhaust
This one has an x pipe to balance the sound. Its pretty quiet and runs on a tour boat on caddo. Sounds good an performs good with other modd
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| Fri Jan 24, 2014 9:41 am |
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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 Re: custom building exhaust
so being an x pipe im guessing they connect in the middle of the pipe where they touch right before the mufflers
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| Fri Jan 24, 2014 9:53 am |
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Will C
MMT Sponsor
Joined: Fri Jan 10, 2014 1:16 pm Posts: 2107 Location: Gladewater TX
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 Re: custom building exhaust
Yes sir. There are many different ways. Just have fun with it. If it flows too good u might have to up jet your carb. But thats not hard
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| Fri Jan 24, 2014 10:00 am |
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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 Re: custom building exhaust
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| Fri Jan 24, 2014 10:04 am |
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Will C
MMT Sponsor
Joined: Fri Jan 10, 2014 1:16 pm Posts: 2107 Location: Gladewater TX
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 Re: custom building exhaust
If your motor flows more air u will need to add a bit of fuel to keep your engine runnin cool. Not enough fuel and your motor will run lean and hot. By "upjet" i mean increasing the size of the main jets in carburator. For nice exhaust only i add 5-8% on mainjet size
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| Fri Jan 24, 2014 10:17 am |
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dwight37
MMT Pro Member
Joined: Sat Sep 03, 2011 8:31 pm Posts: 375
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 Re: custom building exhaust
Here's a stainless muffler I built
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| Fri Jan 24, 2014 4:55 pm |
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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 Re: custom building exhaust
Aint seen one like that. Did you build the whole muffler?
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| Fri Jan 24, 2014 6:44 pm |
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North LA Hunter
MMT Elite Member
Joined: Mon Aug 02, 2010 8:39 pm Posts: 6976 Location: West Monroe, LA
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 Re: custom building exhaust
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| Fri Jan 24, 2014 6:59 pm |
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Woodiebuster
MMT Elite Member
Joined: Wed Mar 03, 2010 7:00 pm Posts: 6060 Location: Choudrant, La
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 Re: custom building exhaust
_________________ CSM Custom 18x42 Battleship with a 36 PD beating you to the hole My Rig (Old Motor) viewtopic.php?f=5&t=45193
(New Motor) viewtopic.php?f=5&t=54733 Stumps Fear Me
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| Sun Jan 26, 2014 7:32 pm |
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ajverret
MMT Addict
Joined: Sun Sep 29, 2013 5:33 pm Posts: 645 Location: New Iberia, La
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 Re: custom building exhaust
Wonder how 2 Curtis sparks mufflers would sound
_________________ 1848 Uncle J and 37 EFI GTR
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| Sun Jan 26, 2014 7:43 pm |
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Bigrich
MMT Elite Member
Joined: Wed Dec 19, 2012 7:52 pm Posts: 7064 Location: Mallard country
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 Re: custom building exhaust
Can't rem the site but u can buy the flanges on the web
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| Sun Jan 26, 2014 7:50 pm |
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pokey79
MMT 1000 Club
Joined: Mon Nov 15, 2010 4:50 pm Posts: 2282 Location: Circumcised, Louisiana
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 Re: custom building exhaust
well look who's back on mmt ^^^^LOL!! its some VW website to get flanges
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| Sun Jan 26, 2014 7:59 pm |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm Posts: 16915 Location: Rowlett, TX
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 Re: custom building exhaust
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| Sun Jan 26, 2014 7:59 pm |
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dwight37
MMT Pro Member
Joined: Sat Sep 03, 2011 8:31 pm Posts: 375
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 Re: custom building exhaust
Since I work at a machine shop I made the flanges! ! I ordered the 1 1/4 stainless tubing already bent I welded caps on 1/4 wall 5" tubing then took a skim cut to cut the weld down and give it a smooth look
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| Sun Jan 26, 2014 8:02 pm |
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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 Re: custom building exhaust
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| Sun Jan 26, 2014 8:04 pm |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm Posts: 16915 Location: Rowlett, TX
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 Re: custom building exhaust
No, I don't think so, but measure yours. One of those sites probably has something that will fit.
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| Sun Jan 26, 2014 8:05 pm |
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Bigrich
MMT Elite Member
Joined: Wed Dec 19, 2012 7:52 pm Posts: 7064 Location: Mallard country
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 Re: custom building exhaust
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| Sun Jan 26, 2014 8:05 pm |
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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 Re: custom building exhaust
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| Sun Jan 26, 2014 8:06 pm |
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Will C
MMT Sponsor
Joined: Fri Jan 10, 2014 1:16 pm Posts: 2107 Location: Gladewater TX
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 Re: custom building exhaust
Quick an easy. Small diameter and long tube header. 2/1 collector. Glasspack and flex joint from oreilly bout 75 bucks total . These pipes make for a very strong motor
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| Tue Jan 28, 2014 6:14 pm |
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Mag10
MMT Pro Member
Joined: Wed Jan 14, 2009 12:31 pm Posts: 342 Location: Faribault, Mn
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 Re: custom building exhaust
Pm me your email address. I can send you some sketches of the ones I have built.
I still have a couple sets of ss flanges that should fit that engine.
Mag10
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| Wed Jan 29, 2014 8:39 pm |
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Colbeans
MMT Pro Member
Joined: Wed Oct 02, 2013 9:29 am Posts: 411
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 Re: custom building exhaust
. I used the old flanges and used a piece of 3 inch processing pipe with a 1 inch stub out the back cut on a 45 with 2 homemade caps be ready to be the center of attention on the river cause when you have it loud people Ganna stare lol
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| Fri Jan 31, 2014 8:12 pm |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm Posts: 4310
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 Re: custom building exhaust
Made this one a slip fit
IMG_1196.JPG IMG_1194.JPG
When I added hydro reverse, the cylinder wouldn't clear the exhaust so I made another. This time, no slip fit.
IMG_2419.JPG
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| Mon Feb 03, 2014 6:05 am |
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Bigrich
MMT Elite Member
Joined: Wed Dec 19, 2012 7:52 pm Posts: 7064 Location: Mallard country
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 Re: custom building exhaust
Looks good banded!!
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| Mon Feb 03, 2014 6:16 am |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm Posts: 4310
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 Re: custom building exhaust
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| Mon Feb 03, 2014 9:56 am |
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JDF71
MMT Member
Joined: Tue Nov 19, 2013 12:12 pm Posts: 10
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 Re: custom building exhaust
NICE!!!!!!!
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| Mon Feb 03, 2014 12:14 pm |
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shsuhunter
MMT Member
Joined: Mon Jan 14, 2013 5:37 pm Posts: 45
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 Re: custom building exhaust
that thing looks good! did you do any sort of baffle on the inside?
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| Mon Feb 03, 2014 7:26 pm |
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barnes_53
MMT 1000 Club
Joined: Wed Jul 18, 2012 4:14 pm Posts: 4781
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 Re: custom building exhaust
Where is Schauv01 with that Ghostbuster backpack he invented? 
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| Mon Feb 03, 2014 7:53 pm |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm Posts: 4310
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 Re: custom building exhaust
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| Tue Feb 04, 2014 5:37 am |
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Bigrich
MMT Elite Member
Joined: Wed Dec 19, 2012 7:52 pm Posts: 7064 Location: Mallard country
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 Re: custom building exhaust
Did it have the pining sound like a stock gutted?
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| Tue Feb 04, 2014 7:46 am |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm Posts: 4310
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 Re: custom building exhaust
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| Tue Feb 04, 2014 8:46 am |
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goodblasson
MMT Pro Member
Joined: Fri Apr 30, 2010 11:26 am Posts: 254 Location: Lafayette, La
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 Re: custom building exhaust
Built this last year. Been running gutted stock exhaust lately just to compare. Hard to choose a winner.
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| Tue Feb 04, 2014 8:56 am |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm Posts: 4310
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 Re: custom building exhaust
Not to hijack this thread or anything, but since were talking about exhaust, where the hell can I get some new exhaust bolts? I have been using the same stock rusted ass bolts for a while now and the head is starting to round.
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| Tue Feb 04, 2014 9:25 am |
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Will C
MMT Sponsor
Joined: Fri Jan 10, 2014 1:16 pm Posts: 2107 Location: Gladewater TX
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 Re: custom building exhaust
Fastenall
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| Tue Feb 04, 2014 10:10 am |
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