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Old May 13, 2012 | 05:39 PM
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Default True duals

Should installing duals make a big difference in exhaust volume when using the same slip ons that was used on stock head pipe? How bout running temp. I just installed a set on my 09 sg and the exhaust is way louder and seems to be hotter. I know.....probably a dumb question but keep in mind I'm a previous wing owner and didn't deal with exhaust. Only fancy lights and gizmos
 
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Old May 13, 2012 | 05:55 PM
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I believe one side's internals are different from the other.
I purchased a set of head pipes and then a set of B&E mufflers.
http://www.superflowmufflers.com/
Then I got a dyno tune cause I don't like playing with stuff.
 
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Old May 13, 2012 | 06:01 PM
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Did mention in original thread that the pipes are arlen ness duals and the slip ons are v&h twin slash. Running a pc-v with a map from fuelmoto.
 
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Old May 13, 2012 | 06:01 PM
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Didn't mention in original thread that the pipes are arlen ness duals and the slip ons are v&h twin slash. Running a pc-v with a map from fuelmoto. Sorry about the double post.
 

Last edited by Armstronges; May 13, 2012 at 06:09 PM.
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Old May 13, 2012 | 07:24 PM
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True duals are louder than the stock headpipe when comparing with the same slipons. Hotter? Could be that you're running leaner now with the increased exhaust flow that true duals provide. Contact Kieth at FM and he will send you a map for your true duals setup. I think you'll find that the new map is richer than a similar map for stock headpipe.
 
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Old May 14, 2012 | 07:02 AM
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With your stock pipes the exhaust from each cylinder is divided between the two mufflers. With TDs the exhaust from one cylinder goes out of only one muffler, which is why your bike is noisier.
 
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Old May 14, 2012 | 08:20 AM
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Originally Posted by grbrown
With your stock pipes the exhaust from each cylinder is divided between the two mufflers. With TDs the exhaust from one cylinder goes out of only one muffler, which is why your bike is noisier.
Not sure I understand the logic. With stock pipes the exhaust is divided between two mufflers. With TDs, the exhaust is STILL divided between the same two mufflers.
 
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Old May 14, 2012 | 08:33 AM
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According to the dealer, no. I was looking into this as an option but decided to get some better flowing slip ons.
 
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Old May 14, 2012 | 09:33 AM
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I don't speak Texan but maybe this will help: The two cylinders on a stock system SHARE both exhausts. On a TD system each cylinder flows through it's own exhaust pipe and muffler.
OP: you may need a slight re-map on your PC-V to adjust for any increased flow from your new TD system.
 
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Old May 14, 2012 | 10:55 AM
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Originally Posted by Leftcoaster
I don't speak Texan but maybe this will help: The two cylinders on a stock system SHARE both exhausts. On a TD system each cylinder flows through it's own exhaust pipe and muffler.
OP: you may need a slight re-map on your PC-V to adjust for any increased flow from your new TD system.
Yup, Texan is difficult!

To revise those words slightly: each cylinder on a stock system uses both mufflers. On a TD system each cylinder flows through only one muffler.
 
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