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21-07-2008, 08:52 AM
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#1 (permalink)
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Honda CB1300 2004
Join Date: Jan 2008
Location: Hills
Posts: 39
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Build your own - Exhaust Can Design
I just can't seem to find a slip on exhaust can that I like for the CB 1300 and so I thought I'd have a go at making my own. The only problem is finding sufficient technical information to do it. Any ideas would be appreciated. ATM I am looking at a back pressure of say 2-6 psi and a straight through flow with ceramic wool in the skin behind a stainless steel mesh or perforated sheet but really I have very little idea of what I am doing.
Key features should be 1. Small slip on 2. Improve BHP across the entire range with overall improvement of 10% min. 3. Noisy enough to be heard quiet enough to get away with it. 4. Deep base sound escalating to a lovely crackling scream..... Sounds like a girl I used to know. 
Any ideas greatly appreciated - Not in any rush but would like to get it right first time.
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21-07-2008, 08:55 AM
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#2 (permalink)
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2001 Ducati 748R
Join Date: Jul 2006
Location: Mexico
Posts: 17,161
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Quote:
Originally Posted by Nigeldad
Improve BHP across the entire range with overall improvement of 10% min.
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Not with a slip-on mate, that's full system territory.
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- 2001 748R - Ohlins suspension - Ohlins steering damper - 996 barrels and heads - Vee Two cams - Ported head by Vee Two to corse specs - Vee Two pistons - Vee Two enlarged valves - Titanium I beam conrods - Lightened crank - CF air box and tubes -60mm throttle bodies - 52mm termi system - Corse 4 post slipper clutch -
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21-07-2008, 11:45 AM
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#3 (permalink)
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gee ess ex are
Join Date: Feb 2007
Location: Hills
Posts: 3,019
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Quote:
Originally Posted by Nigeldad
Sounds like a girl I used to know.
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 dad ya shocking
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A7X drifting in cars is for pussys
"you gave me asthma" lol
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21-07-2008, 11:59 AM
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#4 (permalink)
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2001 Ducati 748R
Join Date: Jul 2006
Location: Mexico
Posts: 17,161
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Dude, he's talking about your mum.
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- 2001 748R - Ohlins suspension - Ohlins steering damper - 996 barrels and heads - Vee Two cams - Ported head by Vee Two to corse specs - Vee Two pistons - Vee Two enlarged valves - Titanium I beam conrods - Lightened crank - CF air box and tubes -60mm throttle bodies - 52mm termi system - Corse 4 post slipper clutch -
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21-07-2008, 12:09 PM
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#5 (permalink)
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06 ZX6
Join Date: Jul 2007
Location: SOR
Posts: 4,208
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Quote:
Originally Posted by Desmogod
Dude, he's talking about your mum.
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hahahahah 
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Last edited by CitizenD : Today at 11:12 AM. Reason: Needed more racism.
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21-07-2008, 12:49 PM
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#6 (permalink)
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gee ess ex are
Join Date: Feb 2007
Location: Hills
Posts: 3,019
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lol well i did type, ur married to her, but then that would be like me knowing that shit
thats a big NO NO
haha
__________________
A7Xdrifting in cars is for pussys
"you gave me asthma" lol
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21-07-2008, 02:33 PM
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#7 (permalink)
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K7 GSX1400 1981 750Z
Join Date: Aug 2007
Location: Near the motorplex
Posts: 2,660
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sounds good! have you looked into using a slip on built for one of the other big nakeds? and maybe modifying that to fit?
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Formerly Team_750Z  |
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22-07-2008, 08:15 PM
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#8 (permalink)
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Join Date: Nov 2005
Posts: 46
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Mike from The Flying Banana made his own for his GS.
Might not be exactly what you are looking for but will give you an idea. |
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23-07-2008, 05:32 PM
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#9 (permalink)
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Honda CB1300 2004
Join Date: Jan 2008
Location: Hills
Posts: 39
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Quote:
Originally Posted by shedman1300
Mike from The Flying Banana made his own for his GS.
Might not be exactly what you are looking for but will give you an idea. |
Thanks Shedman that gives me great encouragement!
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Luck is not a factor
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23-07-2008, 06:18 PM
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#10 (permalink)
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Join Date: May 2006
Location: Bentley
Posts: 8,373
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Untitled Document might give you some more...
Edit - they are offline it seems, but they sell carbon/Ti/SS sleeves etc for exhausts.
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No amount of genius can overcome a preoccupation to detail.
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23-07-2008, 06:57 PM
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#11 (permalink)
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CBR600RR7, 1.5x VJ22 RGV250
Join Date: Jun 2006
Location: Canning Vale
Posts: 10,160
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Modern engine thinking as far as power generation goes (for 4 strokes) is backpressure = bad.
There's no need for it (bearing in mind that its still possible to go to a pipe that's too big, but that's because it will cause the exhaust gas to cool down too much on its way out which makes it flow slower and you lose the extraction effect).
No, you won't burn valves, you just ramp the fuel up a bit with your EFI.
But yeah, like desmo said, 10% gain from a slip on is a pretty bloody big ask.
Add a power commander and some dyno time and you might get somewhat close. If you can get rid of the cat (full system reqd) you'll free up a bit more most likely.
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CBR600RR
R&G sliders, R&G tail tidy, HEL braided lines, ASV shorty levers, Akrapovic slip-on.
RGV250
Arrow pipes
New to riding? Or group riding?
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23-07-2008, 07:25 PM
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#12 (permalink)
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Honda CB1300 2004
Join Date: Jan 2008
Location: Hills
Posts: 39
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Quote:
Originally Posted by thro
Modern engine thinking as far as power generation goes (for 4 strokes) is backpressure = bad.
There's no need for it (bearing in mind that its still possible to go to a pipe that's too big, but that's because it will cause the exhaust gas to cool down too much on its way out which makes it flow slower and you lose the extraction effect).
No, you won't burn valves, you just ramp the fuel up a bit with your EFI.
But yeah, like desmo said, 10% gain from a slip on is a pretty bloody big ask.
Add a power commander and some dyno time and you might get somewhat close. If you can get rid of the cat (full system reqd) you'll free up a bit more most likely.
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Yup got the PC3 and the air stacker so I'll be giving it a try!
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Luck is not a factor
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23-07-2008, 07:31 PM
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#13 (permalink)
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Ducati Monster S4R, Suzuki GSXR1000K6, KTM 525EXC, KTM 530EXC, I had to give the K7 750 back :'(
Join Date: Apr 2006
Location: SOR
Posts: 6,970
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Sorta what Thro said...
You can easily make a nice looking muffler...and it will work...
If you made it freer breathing than stock but not unmuffle it too much, with some tuning I would expect to see a gain in power...
not 10% though...
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 3 Sleeps till Sepang MotoGP |
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24-07-2008, 07:22 PM
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#14 (permalink)
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Honda CB1300 2004
Join Date: Jan 2008
Location: Hills
Posts: 39
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Quote:
Originally Posted by Rich
Sorta what Thro said...
You can easily make a nice looking muffler...and it will work...
If you made it freer breathing than stock but not unmuffle it too much, with some tuning I would expect to see a gain in power...
not 10% though...
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Thanks guys I am getting closer in my thinking now
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