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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> OEM Exhaust Modification /cgi-bin/YaBB.pl?num=1250949942 Message started by Routy on 08/22/09 at 07:05:42 |
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Title: OEM Exhaust Modification Post by Routy on 08/22/09 at 07:05:42 Can't find anything in search on it. I have read about cutting the end plate out of the OEM muffler. What about drilling 6 holes in a circle midway between the rivets and the center pipe ? Last nite I machined a plug for the pipe, and spot centered it while in the lathe, then w/ a pair of dividers drew a circle between the rivets and the center pipe. Then drilled six 1/4" holes equally divided on the circle. The exhaust is a little louder, and quite a lot of exhaust is coming out those holes. It looks good (wouldn't know it if you didn't know it) and I think it sounds good too. But, the question is,....what did I do,....not knowing what I was doing ? Sure seems like I relieved the exhaust somewhat. If I screwed up, my mig welder is just waiting to plug'm up :'( Untill then I'm ready for a touch of enrichment,......ain't I ? :) |
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Title: Re: OEM Exhaust Modification Post by verslagen1 on 08/22/09 at 09:11:43 If it sounds good to you, great. I feel most people over drill the muf and ruin the sound. 1/4" holes sound about right. |
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Title: Re: OEM Exhaust Modification Post by Routy on 08/22/09 at 10:00:31 Actually the hole are 7/32. I just took it for a ride, it has a touch of back rap on decelleration now, no louder on acceleration....that I can hear, but really sounds good at idle. But it sure needs some enrichment in 2nd gear...light throttle. I'll get on that next. Stick around incase I get in trouble :o :) Rich |
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Title: Re: OEM Exhaust Modification Post by bill67 on 08/22/09 at 10:16:50 I would have thought that small of a hole would have whistled. I have a 1/2 in hole drilled up in to the muffler,It doesn't sound to good but I lost a little low in power and gained some at the top.All my bikes I drilled like that accept the Goldwing, The Moto Guzzi i put different mufflers on. |
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Title: Re: OEM Exhaust Modification Post by Rocco on 08/22/09 at 13:42:09 my stock muffler has a couple holes drilled in it, kind of big not sure how big though. mine sounds great, backfires like crazy(which in case u didn't notice i kinda like lol) but i just got a debaffled sportster muffler that i'm awaiting my jet kit to put on with. it's all about u and what u like ! don't listen to the others, they're just jealous of the relationship we have with our bikes LOL!! |
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Title: Re: OEM Exhaust Modification Post by Charon on 08/22/09 at 18:18:26 A "relationship?" With a machine? I guess, if you say so. To me, a motorcycle is just another machine. Some I like better; some I don't like too much. Most get traded within a few years in hopes of finding one I like better. But - a "relationship?" I don't think so. I think of a "relationship" as a two-way deal. Machines return nothing. They have no emotions, no soul. They are purely and simply machines. |
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Title: Re: OEM Exhaust Modification Post by BurnPgh on 08/23/09 at 01:25:43 Definately a relationship. You invest time care concern and labor in maintaining your machine. In return you get transportation, fun, financial savings (sometimes), relaxation. You also get a hobby you can continue for life and the ability to create something unique (if you do a lot of modding). |
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Title: Re: OEM Exhaust Modification Post by Oldfeller on 08/23/09 at 02:02:18 Yes, they are just unfeeling machines -- but you are not. You supply both emotional sides of the relationship and you enjoy what you have built and the machine does its job which is to act like a machine while you play around having a relationship with it. ========= Ask any woman .... they can tell you all about it. ========= "Yes, they are just men -- but you are not. You supply both emotional sides of the relationship and you enjoy what you have built and the man does his job which is to act like a man while you play around having a relationship with him." ========= Skills developed in both fields of "relationship building" are useful, what you learn working with your machine will help you get along better with your spouse. Turn about is fair play after all, if you can't manage to keep a relationship going with a machine how the heck is she going to get you to play along properly with having a relationship going on with her? Same head skills apply. "Isn't it all just in your head??" Yep, but that is where you live and have your entire life too. All the good stuff depends on somebody's head to make it work. |
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Title: Re: OEM Exhaust Modification Post by Rocco on 08/23/09 at 09:17:03 sorry u don't feel the same charon, luckily the others got it and i don't look crazy lol when i uncover my savage, i smile. when she backfires, i laugh. when i see a big pot hole and i move her around with ease, i'm glad she's so light. i told my girl, that every relationship should benefit each half for the better. in this relationship i think that applies and i believe i benefit from all the fun & skills i've gained and she does what she was meant to do ROAR! lol |
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Title: Re: OEM Exhaust Modification Post by Pabst 2006 on 08/23/09 at 14:34:49 In May I came a dozen or so feet away from hitting 2 deer, and I promptly got into an exhaust-mod kick. I did almost the same thing as you did, I made 6 x 1/4" holes evenly spaced around the endplate, except I didn't put a plug on the pipe as you did, if I read your post correctly. The six quarter-inch holes in addition to the stock exhaust opening gave a louder sound at idle, not harsh, just an ominous WHOMP WHOMP WHOMP, think of the deep sound of an Apache/Huey helicopter hovering. When I accelerated from a standstill, the sound, well, you could tell it was a low-budget solution, as it lost a bit of that ominous low-frequency sound and gained an ATV/4-wheeler exhaust sound in those midrange RPMs. I did enjoy it for a couple weeks, and I could actually enjoy the sound of the bike at highway speeds without it being terribly loud. Then I noticed some problems, primarily that of the air-fuel mixture becoming more lean (than it already was @ stock settings), hesitation and surging at low throttle openings, observed less of low-end and midrange torque, with more frequent afterfire on sharp deceleration, no more pops on shutoff - this time it's a loud blast. The next step was finding out how to drill out the plug and uncover the idle mixture / pilot adjuster screw, and after many adjustments (it was getting over 8 turns out on the screw), it still was in a very lean condition, which means that lil' piston was enduring hotter temps for a sustained duration. Not good. The next step after that would be to re-jet and replace the pilot and main jet at the very least, but I had to throw in the towel as I'm only 25% of the way to having the bike paid off and am hesitant to do any further modification. Some day, some day..... (shakes fist) -Pabst |
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Title: Re: OEM Exhaust Modification Post by Routy on 08/23/09 at 20:29:29 I'll get this OEM exhaust mod description correct sooner or later. In actuality, there is 8 7/32 holes, not 6 like I said. And the plug did not stay in the pipe, I put it there just to have a center point. It looks good, and sounds kinda like...... half a Harley ?? ::) |
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Title: Re: OEM Exhaust Modification Post by Pabst 2006 on 08/24/09 at 17:35:30 In addition to the method you and I did, there was discussion on this site of a modification of the OEM muffler called the "Hartman mod"... you could try searching for it on this site or try Googling for it. The original writeup and pictures were on an external site. Instead of drilling the holes in the endplate, from what I recall you'd cut and detach the endplate, pull out the cylindrical baffle/airflow restriction and modify it somewhat, then reinstall what's left and repack the muffler with fiberglass. You'd have to do a search for the Hartman mod to get the exact details, it was from a couple years ago so set your search setting to "All Posts". And, there was a video on YouTube I came across that featured an exhaust sound of a Savage muffler modified with the Hartman mod, or something close to it. -Pabst |
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Title: Re: OEM Exhaust Modification Post by Oldnewguy on 08/31/09 at 06:10:01 I just googled "hartman mod" and it came up as first choice. Has good instructions, etc. On the site is a link to another mod that looks interesting. |
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Title: Re: OEM Exhaust Modification Post by Duane on 08/31/09 at 07:15:22 I would like a Dyna myself but I hate to waste a prefectly good muffler. How many miles do people tend to get on the stock muffler before it starts to fall out? I have a feeling the stock muffler will last a long time. |
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Title: Re: OEM Exhaust Modification Post by Rocco on 08/31/09 at 07:53:48 mine lasted 7000 miles and since '95.....but was totally destroyed by me taking it off...so i guess it lasts until u rip it off ahahaa |
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Title: Re: OEM Exhaust Modification Post by Duane on 08/31/09 at 13:11:50 Well I almost have 8K on my 03 and it's still very solid and I don't see any signs of wear yet. One day I will get a Dyna but I'm gonna ride the OEM still it's shot. |
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Title: Re: OEM Exhaust Modification Post by Routy on 08/31/09 at 18:20:57 Its been a week now since the OEM mod, and I'm likin it better all the time. The exhaust is running much free'er, but not obnoxiously loud. But I sure could use some midrange enrichment,......my next project. |
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Title: Re: OEM Exhaust Modification Post by serenity3743 on 09/01/09 at 05:17:20 2415010E05600 wrote:
I didn't replace my muffler until I replaced my engine: about 54,000 miles. |
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Title: Re: OEM Exhaust Modification Post by Oldnewguy on 09/01/09 at 06:43:00 I wracked my brains trying to decide what to do with my '96. Had a price of 106.00 for a new Jardine slip-on, but that fell thru. Have decided that I am going to just wear it out. No re-jetting and such. I do need to do the white washer thing however. |
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Title: Re: OEM Exhaust Modification Post by Oldfeller on 09/01/09 at 07:06:56 I planned to run my stock for a long time, but I broke some of the welds on some of the supporting bracketry (dragging the pavement in corners) and found that installing my $20 Dyna was both easier to do and less expensive to do than putting the stock muffler back to right. And lighter. And simpler. Now that I am used to the Dyna, I like it fine. It rumbles more and on a fast interstate run it will huff and puff on the exit ramps deceleration like an airbrake would -- interesting noises and I expect some small flames are shooting out of it when it makes that "rottle rottle rottle" sound on decel. |
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Title: Re: OEM Exhaust Modification Post by Oldnewguy on 09/01/09 at 10:10:27 What did you have to do to the carb when you added the dyna? I guess that's covered in the tech section, but maybe you could give a "down and dirty" |
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