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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Drilling Stock Muffler /cgi-bin/YaBB.pl?num=1316137961 Message started by Routy on 09/15/11 at 18:52:41 |
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Title: Drilling Stock Muffler Post by Routy on 09/15/11 at 18:52:41 I've had PMs asking about drilling the stock muffler, so here it is again, http://p1.bikepics.com/2010/03/14/bikepics-1926789-full.jpg Simply 8 1/4" holes evenly spaced,.... drilled on a 1 5/8 dia circle. Be careful when drilling thru, as some have reported breaking bits while striking material on the backside. The holes in mine are 5/16 now,......can't say it is much louder than 1/4" holes. |
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Title: Re: Drilling Stock Muffler Post by VOLKY on 09/15/11 at 20:37:48 Any difference in sound? |
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Title: Re: Drilling Stock Muffler Post by Routy on 09/16/11 at 05:14:54 6E777473617479767C180 wrote:
Definently,.....and most have liked the better,......and a little louder sound. |
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Title: Re: Drilling Stock Muffler Post by VOLKY on 09/16/11 at 14:06:20 Im doing the same thing. I will let you know what i think. ;D |
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Title: Re: Drilling Stock Muffler Post by prsavage on 09/16/11 at 20:26:33 My stock muffler came to me with four holes each 1/2" evenly spaced around center main hole. Sound was way better than my wife's stock setup. I had absolutely no blue on the chrome and no backfiring either. I don't know what my jets were though. I'll check one day when I get the bike running again. |
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Title: Re: Drilling Stock Muffler Post by Routy on 09/16/11 at 23:03:24 The only real reason for more smaller holes might be in the case of wanting it back to stock. The small holes will plug very easy w/ a mig welder. |
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Title: Re: Drilling Stock Muffler Post by VOLKY on 09/17/11 at 11:29:43 Well, I drilled hole on my muffler also. It does sound better (bit louder) but I can still hear the whistling sound from the stock sound. Oh well, at least it sounds better. I'm still shopping for a Harley Dyna muffler to replace. Does anyone has a video clip of the harley Dyna muffler? http://i1182.photobucket.com/albums/x459/volkyland/DSCF3747.jpg |
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Title: Re: Drilling Stock Muffler Post by verslagen1 on 09/17/11 at 12:09:55 with that much rust evident on the back end, most likely the internals look worse. you might consider this... http://suzukisavage.com/cgi-bin/YaBB.pl?num=1268121565/0 |
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Title: Re: Drilling Stock Muffler Post by VOLKY on 09/17/11 at 12:32:00 How about a Harley Dyna muffler? |
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Title: Re: Drilling Stock Muffler Post by Arizuno on 09/18/11 at 20:14:00 This afternoon I opened up the drilled holes from 3/8" to 1/4". Much better, and good enough. |
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Title: Re: Drilling Stock Muffler Post by Routy on 09/20/11 at 04:44:33 7B4853404F54553A0 wrote:
Was that difficult ? :o Never mind, we get the picture ;) |
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Title: Re: Drilling Stock Muffler Post by bill67 on 09/20/11 at 06:07:13 333C263D212734363E3027550 wrote:
Was that difficult ? :o Never mind, we get the picture ;) [/quote] Its not hard to do that you just have to run the drill in reverse :) |
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Title: Re: Drilling Stock Muffler Post by Routy on 09/20/11 at 14:05:54 Yes, but you need some filler rod ! ;D |
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Title: Re: Drilling Stock Muffler Post by deepvalley on 09/21/11 at 16:04:52 Hey guys and gals! I am new to this forum but I tried this years ago and it works great until the rust eats the metal out between the holes! I drilled 3/8s inch holes evenly spaced. ;D ;D It then has a sick very unharmonius "blat" sound. My solution to that was to completely remove the rear plate, not an easy task but the sound was fantastic and My lil lady seemed to run better. Hope everything works out for you! ;D |
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Title: Re: Drilling Stock Muffler Post by bill67 on 09/21/11 at 16:47:46 The best solution is to take a long bit and drill down the pipe,Thats the way I've did it for year,Some bikes sound good,The S40 not so hot.You lose a little low end and gain a little high end power.I've heard all the pipes on this site and none sound good to me,A single just doesn't have a good sound to me anyway. |
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Title: Re: Drilling Stock Muffler Post by Gyrobob on 09/24/11 at 18:54:43 494247471D1C2B0 wrote:
I love the sound of a big single. One key to having a decent sound in any muffler on large singles is to have a length of pipe with no holes in it carrying the sound away from the muffler. -- If the place the exhaust escapes through little holes is vented directly to outside the muffler, it will sound flat and tinny. -- If you could have the muffler up closer to the engine, and have the muffler dump the exhaust into a straight pipe (the longer the better), it'll will sound deeper and more resonant. For example, the old Triumph twins and BSA Gold Stars always sounded great. Their stock mufflers had over a foot of unholed pipe downstream of the muffler, in and out of the muffler carrying the exhaust and sound away. http://www.bluemelon.com/photo/42589/1745269-S1300x800.0.jpg?optimalizedperformance=true http://www.bluemelon.com/photo/42589/1745389-S1300x800.0.jpg?optimalizedperformance=true |
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Title: Re: Drilling Stock Muffler Post by dan49829 on 07/09/13 at 07:20:18 I drilled two 1/2" holes across from each other and the sound is much improved over stock. Do larger holes produce a lower tone? The backfiring on deceleration seems to be worse now, but it may be that it's just louder. I ordered a Sigma6 jet kit to see if it helps. |
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Title: Re: Drilling Stock Muffler Post by justin_o_guy2 on 07/09/13 at 11:23:19 Do larger holes produce a lower tone? i think thats an interesting question. i wonder if total cross sectional area can be =, yet get a different note, due to a different number of holes...,, my knee-jerk answer is, total cross sectional area of exhaust = tone,, but,, w/o testing,, i cant say for sure. |
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Title: Re: Drilling Stock Muffler Post by oldNslow on 07/09/13 at 19:40:32 Got two appx. 1/2 inch holes in mine courtesy of a previous owner. It's still not very loud. In fact I'd had it for a while before I even noticed that it had been altered. I've never heard an undrilled one run though. I don't really get the "louder is better" deal myself, but to each his own. |
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Title: Re: Drilling Stock Muffler Post by PhantomII on 07/10/13 at 06:30:54 I did mine last night, it reminds me of my old Honda XL 650 with a Answer silencer. It's loud enough for me but I will have to rejet it since it back fires all the time when I decelerate. |
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Title: Re: Drilling Stock Muffler Post by Dave on 07/10/13 at 06:49:43 744C454A504B496D6D240 wrote:
You may need to rejet.....but backfring is not necessarily the measure of proper jetting. The big single doesn't get enough air fuel when the throttle is completely closed even with proper jetting, and the lean mixture does not ignite in the cyclinder and builds up the muiffler and then ignites. Try keeping the throttle opened just a tiny bit as you shift gears or decelerate....it will help to keep the bike from backfiring. You don't need to have the throttle opened far....just enough to allow some extra fuel and air into the cylinder. |
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Title: Re: Drilling Stock Muffler Post by PhantomII on 07/10/13 at 07:52:37 Thanks I will keep that in mind. |
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Title: Re: Drilling Stock Muffler Post by PhantomII on 07/10/13 at 15:44:14 Well I was very mindful of trying to keep the throttle slightly open while decelerating, but the back fires continue. I'm pretty sure the jetting on my bike is lean because i already had to turn the low speed screw out over 8 turns just to get it running acceptable before drilling holes on te muffler. I ordered a jet kit today hopefully it will arrive in a couple of days. |
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