SuzukiSavage.com - Exhaust design (open pipe)

klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: Exhaust design (open pipe) Reply #15 - 02/05/05 at 02:19:16 No substitute for cubes, your engine is 8.7 liters and makes 155bhp/liter, whats the valve sizes and cam timing. We have 150cc cylnders with 40mm throttle bodies 2* 25mm inlets, 2* 22mm exh with 280 degrees for both, can't remember the lifts. What fuel do you run ? Clive W
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lordzamize Ex Member	Re: Exhaust design (open pipe) Reply #16 - 02/05/05 at 10:21:11 Just a quick question regarding exhaust design. Anyone know if there are issues in removing the baffle and plate from a 97 savage? I've already tapped two holes in the plate, and the bike has a great sound. I'm curious if removing the baffle and plate all together will affect the bike in a negative way. Z
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Mr 650 Serious Thumper Offline The LS650- Classic style & 4-valve engine Posts: 1389 Mempho Gender:	Re: Exhaust design (open pipe) Reply #17 - 02/05/05 at 10:55:04 Fuel is VP C-25. http://www.nhra.com/media/1999/121602.html Steve Schmidt builds the motors, http://www.steveschmidtracing.com/ssr_003.htm
Back to top	SilverBlue '01,K&N,Snorklectomy,125mm NOS carb, 1/2 spacer & 155, 'Trapp, NC flyscreen, Suzy GelSeat, Osram H4 later..putt. Putt, PUtt, PUTT! 8) HelmetLawsSuck IP Logged

Mr 650

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Re: Exhaust design (open pipe)
Reply #18 - 02/05/05 at 11:51:33

lordzamize wrote on 12/31/69 at 16:00:02:

Just a quick question regarding exhaust design.

Anyone know if there are issues in removing the baffle and plate from a 97 savage? I've already tapped two holes in the plate, and the bike has a great sound. I'm curious if removing the baffle and plate all together will affect the bike in a negative way.

Z

No problem, but there is still some restrictions in there.
1st thing I did, took a long 1/2" service/entry bit and drilled through mine until I could see daylight straight through the muffler.
I was dissappointed, it still sounded sorta like a lawn mower. It was apparent that it needed packing like the "Hartman modification". I have 2 or three mufflers sitting around and plannned to try the Hartman mod sometime. I lost interest after installation of the Supertrapp. I wanted to open up the muffler, and pack the rear baffle like the Hartman then have both the head pipe & "Hartman" modifed muffler coated, but then the 'Trapp seemed to do the trick w/o the work and you can swap the end caps from open (bike night) to closed (touring) as needed. Wink

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SilverBlue '01,K&N,Snorklectomy,125mm NOS carb, 1/2 spacer & 155, 'Trapp, NC flyscreen, Suzy GelSeat, Osram H4
later..putt. Putt, PUtt, PUTT! 8)
HelmetLawsSuck

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lordzamize Ex Member	Re: Exhaust design (open pipe) Reply #19 - 02/05/05 at 12:45:13 So, technically, I could get away with it, and the bike wouldn't be harmed. The only issue is that there are restrictions left over, even after doing what I stated before. Kewl. Z
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klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: Exhaust design (open pipe) Reply #20 - 02/06/05 at 01:27:28 On My KLX the std. silencer had an exit diameter of 20mm. I put a slightly bigger header on and a new (stainless) silencer with a 40mm outlet. Modifying the exhaust is a cheap option and will give good results. Clive W
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Max_Morley

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Re: Exhaust design (open pipe)
Reply #21 - 02/13/05 at 19:47:30

Clive, have a follow-up question to your straight pipe chart. When using a muffler with a center baffle (HD FXD glasspac, at point of sale claimed to be Screamin'Eagle, but has a 80dba rating so I doubt it) on my Savage with a Original RAASK headpipe, what effect (besides noise reduction) doe the center baffle have? The setup works well and is not obnoxious, but I have been thinking about a chambered muffler to enhance the deeper tones. Also at onetime a responder on Bert's forum indicated (if my memory serves me) that glass packs have more resistance than standard muffler as engine speed and exhaust flow goes up? Can you either explain or deny this? Thanks Max

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Max at Thumper Acres. '96 Savage bagger, '03 Savage w/Cozy sidecar for wifeni.

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klx650sm2002

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Re: Exhaust design (open pipe)
Reply #22 - 02/14/05 at 09:19:11

Sorry I'm not familiar with the term center baffle.
I allways use absorption type silencers (perforated tube,glass pack.Is this what You mean).
The i.d. of the silencer must be at least 12% greater than the i.d. of the header (I use 23% on KLX).
There are two reasons for this, good flow and the step is retained at the end of the header (I use two steps 3" apart on KLX to spread the power out a little)
I intend using two chambered silencers on my SR/XT project but it's many months till i hear that run.

Clive W Cheesy

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Max_Morley

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Re: Exhaust design (open pipe)
Reply #23 - 02/15/05 at 20:22:13

Center baffler = stop (restriction) in the the middle of the muffler that forces the exhaust through the perforations in the front half to come out the perforations in the back half before exiting. So your experience has been good using "glasspacs" of the proper diameter and you have not experienced high RPM restrictions? I was not able to envision it causing restrictions but am not an engineer so the science of that I've not studied. Max

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Max at Thumper Acres. '96 Savage bagger, '03 Savage w/Cozy sidecar for wifeni.

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klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: Exhaust design (open pipe) Reply #24 - 02/16/05 at 02:53:52 I like "glasspacks" and as long as the i.d. is big enough (at least 12% more i.d. than the header,more is ok but definately not less) they are not restrictive. Clive W
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klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: Exhaust design (open pipe) Reply #25 - 02/17/05 at 05:00:36 If you have fitted your glass pack and are looking for a touch more silencing you could fit an insert into the exit of the silencer reducing it's area to that of the header, 38mm i.d. in this case. Clive W
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klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: Exhaust design (open pipe) Reply #26 - 02/20/05 at 02:16:58 If it were my Savage I would use a 1.5" i.d. 44.25" long header mated to a 1.875" i.d. silencer (should be able to get a step pipe from a exhaust shop) with an insert as stated above (need to know someone with a lathe). Clive W
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vroom1776

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Re: Exhaust design (open pipe)
Reply #27 - 12/11/06 at 13:51:07

KLX,

What would you suggest as the best glasspack for savage w/

1) stock carb and head pipe?

2) stock head pipe and roundslide carb?

Assume that all carbs have KN filters directly bolted to them...

Presently I'm running a 1.75" ID (all the way through) with a 38mm mikuni VM roundslide with a stock header pipe, but wrapped.

Thses are the GPs I have easy access to.

Now, just for S&Giggles, what if the cam had been reground a bit, say like lancer's (or do you need specific #s for this?)?

Thanks,

V

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vroom1776 Serious Thumper Offline Posts: 2110 Gender:	Re: Exhaust design (open pipe) Reply #28 - 12/12/06 at 09:45:18 yeah, this was in the tech section as of yesterday (dec 11, 2006)...? mods? KLX, thanks, that is the kind of info I am looking for! yes, those exhaust ports do need "some" work, to say the least!
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Savage_Rob

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Re: Exhaust design (open pipe)
Reply #29 - 12/12/06 at 11:28:54

I moved it because it turned into a conversation. That forum is for technical reference materials and the posting guidelines clearly state not to post questions there. Discussion, questions and comments of materials in the tech ref forum belong in either the RSD or Cafe forums. If pertinent information comes up in conversation, it can be added to a thread there but the idea is to avoid having to wade through all the talk to get to the main info like you do in the other forums. The choice came down to deleting all of the talk or moving the thread. I opted to move the thread. Then choice info can either be boiled down or excerpted from it to a new thread in the Tech Ref forum.

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