True Duals question
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Tourer
Joined: Jun 2007
Posts: 269
Likes: 0
From: Eastern Ohio
True Duals question
I've been searching and reading and still haven't come to a decision yet.
The bike: 2007 Ultra with SE Touring muffs, SE a/c, and a Power Commander.
Me: Gearhead, ex-racer, want QUIET and low end torque.
I know that a 2-1 seems to be the best for power. However, I want to eliminate the crossover to keep my leg cool in traffic. I ran true duals on a Sportster and wasn't over impressed but the Big Twins seem to have different power deliver characteristics.
I'm more interested in quantifiable dyno results as the seat of the pants dyno is the worst. So.......
How perceptible is the low end power loss with true duals compared to the stock headers as well as say a SuperTrapp 2-1? Would a 2-1 be as hot as the stock crossover?
I have a line on a set of Bub Crossdressers. Are there any issues with these?
The bike: 2007 Ultra with SE Touring muffs, SE a/c, and a Power Commander.
Me: Gearhead, ex-racer, want QUIET and low end torque.
I know that a 2-1 seems to be the best for power. However, I want to eliminate the crossover to keep my leg cool in traffic. I ran true duals on a Sportster and wasn't over impressed but the Big Twins seem to have different power deliver characteristics.
I'm more interested in quantifiable dyno results as the seat of the pants dyno is the worst. So.......
How perceptible is the low end power loss with true duals compared to the stock headers as well as say a SuperTrapp 2-1? Would a 2-1 be as hot as the stock crossover?
I have a line on a set of Bub Crossdressers. Are there any issues with these?
Last edited by gwcrim; Apr 11, 2010 at 04:50 PM.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
I have written on HDF in the past that while there is a popular belief that true-duals suffer a torque loss, nobody has given any evidence to support this. In my old evo I have an S&S 107 with a TD system on it. S&S recommends TDs as a suitable system and my bike slightly exceeds their spec sheets. I have never tried any other system, but my bike runs just fine!
I have a set of Samson TD pipes with S&S oval mufflers. If they are not quiet enough for you, they make bolt-in baffles.
I have a set of Samson TD pipes with S&S oval mufflers. If they are not quiet enough for you, they make bolt-in baffles.
Road Captain
Joined: Feb 2009
Posts: 690
Likes: 0
From: Huntington Beach, SoCal
Been running True Duals on my 07 RKC and haven't noticed any type of low end torque loss. Running a stock motor and I am totally satisfied with the looks and the power. BTW, I run Vance & Hines
Thread Starter
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Tourer
Joined: Jun 2007
Posts: 269
Likes: 0
From: Eastern Ohio
I snagged a set of brand new black Bub true duals on Ebay for less than $250 shipped. I called Bub and they said the pipes are ceramic coated as well as the shields. A little tweak of the PCIII and my leg will probably be fine.
I'm still thinking about mufflers but we'll see how things work out with the headers.
I'm still thinking about mufflers but we'll see how things work out with the headers.
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
The stock mufflers will probably be too small to fit on the Bub headpipes as I think the Bubs will have 2" outlets and the stock head pipes should be 1 3/4", check it out and see.
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Cruiser
Joined: Jan 2009
Posts: 116
Likes: 0
From: Birmingham,AL
The Bub's head pipes are 1.75 inches. It is the Rinehart head pipes that Bub's use to make that were 2 inches where the head pipe and Reinhart mufflers went together. That was only on the full system Rineharts. The Rinehart slip-ons were 1.75 inches.
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Stellar HDF Member
Joined: Jun 2009
Posts: 2,217
Likes: 53
From: Gladys, VA
Been running true duals on my last two bikes which were stock except for the basic stage I. I here lots about loosing some low end torque but I didn't notice any and I ride alot 2 up. Love the sound! 