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True Duals question

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Old Apr 16, 2010 | 12:16 AM
  #21  
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Originally Posted by Lonewolf176
Here is the difference between tru duals and 2:1. All that was changed is the pipes and retuned.
Which graph is for which set of pipes?

I'm thinking of running Rinehart true duals on the '07 Ultra that I picking up. I've heard that these pipes make good numbers. Is that true?
 
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Old Apr 16, 2010 | 12:25 AM
  #22  
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Tru duals are red lines or the ones that dip below 3500.
 
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Old Apr 16, 2010 | 03:21 AM
  #23  
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Originally Posted by hivoltg
Which graph is for which set of pipes?

I'm thinking of running Rinehart true duals on the '07 Ultra that I picking up. I've heard that these pipes make good numbers. Is that true?
Just installed the Rineharts on my 08UC and can tell you that i love them. The sound alone is worth the change. I did not noticed any power loss. They look as good as they sound. Easy install. I just chromed the tips and they look mo betta now.
 
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Old Apr 16, 2010 | 06:20 AM
  #24  
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I have V & H Dresser Duals and my @$$ dyno did not notice any loss in power. However, the tone of the V & H Ovals changed with the duals.

If you really want to eliminate the heat from the crossover, order a set of RJS Originals Heat Deflectors. Much less cash outlay compared to dual pipes. The deflectors work as advertised and look great compared to the plastic band-aids others sell. Tell him Duck Butter sent ya. BTW-I don't have a pony in the show, just trying to help a fellow rider, and HDF sponsor sell his made in the USA wares...
http://www.rjsoriginals.bizland.com/
 
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Old Apr 16, 2010 | 07:54 AM
  #25  
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Originally Posted by Lonewolf176
Here is the difference between tru duals and 2:1. All that was changed is the pipes and retuned.
Well I sure wish that would have been posted sooner. That's exactly what I was looking for.

I'm pretty happy with the bike as is, but for that darn heat. And too much chrome.
 
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Old Apr 16, 2010 | 08:41 AM
  #26  
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These are the curves for my S&S 107 with true duals. I haven't tried my bike with any other system, but my torque holds up far better than TDs did on your bike. I'm getting 90 ft.lbs or more between 2,600 to 5,600rpm and this was while the engine had only around 500 miles on it. Feels stronger now.

Crim, don't write TDs off!
 
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Old Apr 16, 2010 | 11:59 AM
  #27  
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Originally Posted by dbr1990
I don't believe you would notice the small amount of torque loss when installing true duels on a stock engine.
No you would not notice,besides if power loss was a concern you could tune the exhaust.
 
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Old Apr 16, 2010 | 12:46 PM
  #28  
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Unless I have Supertrapps, how would I tune the exhaust?
 
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Old Apr 17, 2010 | 06:13 AM
  #29  
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Crim, on your first post I think you said the numbers were important to you. If you read many of the posts online here and see some of the posts from the engine builders, they are all claiming the 2-1 exhaust provides better numbers.

I think what you are hearing from those of us with the TDs are, we can still keep up with our riding group and really enjoy the looks, sound and lower heat on the right side.

It comes down to what you really want.

Good luck with your choice.
 
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Old Apr 17, 2010 | 07:39 AM
  #30  
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Originally Posted by luc.who
I think what you are hearing from those of us with the TDs are, we can still keep up with our riding group and really enjoy the looks, sound and lower heat on the right side.

It comes down to what you really want.

Good luck with your choice.
I think what we can also guess is that TDs will work better with some engine builds than others. To press the point, the reason late Sportster-engined Buells ran so much power is, by using a carefully developed exhaust, the engine could be run at a much higher state of tune than the typical stock Sportster exhaust allows.

The same must apply to a big twin. As a Buell fan and owner I am convinced a big twin with an optimum 2-into-1 could produce a truly serious increase in performance over what we are all used to. But with a more normal tune, TDs seem to be just fine. I'll say again, my S&S 107 on TDs slightly exceeds the figures quoted by S&S, so it is losing nothing worth writing home about!
 

Last edited by grbrown; Apr 17, 2010 at 07:41 AM. Reason: Grammar!
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