True Duals
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Joined: Apr 2009
Posts: 82
Likes: 1
From: Chugiak AK
True Duals
What is the point behind changing the head pipe on the newer Harleys? I don't see anything to be gained as the stockers look pretty well constructed, radial bends, no restrictions. So what is to be gained by going to a full ture dual system on the 09 harleys vs going with slip ons that will give that sound that we all desire (except eyes of texas)? I could undersand if it were on a 08 and earlier with the dual cross over pipe for the rear head.
Outstanding HDF Member
Joined: Jul 2006
Posts: 2,876
Likes: 3
From: Washington State
I'm still trying to get used to seeing that new design. My 08 doesn't get hot with my BUB's and I dig the pipes running down both sides. To me it looks like when they put dual tailpipes on a car/truck off a 2-1-2 or split em after the muffler to give the dual look. I'd be worried rocks or debris will come up and beat that pipe over time.
If the 09's pipes are seperate I'd say mufflers will give the same effect as pre 09's with duals. I'm guessing they are crossed over where they meet?
If the 09's pipes are seperate I'd say mufflers will give the same effect as pre 09's with duals. I'm guessing they are crossed over where they meet?
Road Warrior
Joined: Dec 2008
Posts: 1,639
Likes: 2
From: Australia
There is no performance advantage to true duals. They just sound different, some people like the TD sound.
The V&H powerduals are a better looking set of headers than the stock. the 2-1-2 transition is very very smooth, big bore and just looks like it will flow.
I havent seen any back to back dyno runs of the PDs vs TDs vs Stock headers, I would bet money the PDs will make more grunt. I love the 2-1 sound and think they look great too, but each to their own.
The V&H powerduals are a better looking set of headers than the stock. the 2-1-2 transition is very very smooth, big bore and just looks like it will flow.
I havent seen any back to back dyno runs of the PDs vs TDs vs Stock headers, I would bet money the PDs will make more grunt. I love the 2-1 sound and think they look great too, but each to their own.
Extreme HDF Member
Joined: Nov 2006
Posts: 13,389
Likes: 26
From: Windham,Maine
The reason people do what they do! Is because they can! I have not been near an 09 yet,the reason,I just may have to have on.True duals are they only way to fly for this cat.It just feels right!
Banned
Joined: Apr 2009
Posts: 232
Likes: 0
I think that Big X Collector/Crossover looks like $hit.. The True duals look much cleaner. The Crossover X will generate alot of heat right wear your right foot rests on the ground in traffic ..
Last edited by WingNut55; May 26, 2009 at 08:05 AM.
Road Master
Joined: Apr 2008
Posts: 866
Likes: 1
From: FT BRAGG, NC
Unfortunately...opinions are just that opinions. Especially when it comes to the True Dual issue! just sorta like our ABS shootouts! LOL
The 2009 Crossover system running under the engine just serves to get the heat off your legs...yur bike will still get hot...trust me...I rode My friends '09 SG and you can still feel it...not as bad as My '08 SG...but it's still there. As long as they run EPA lean...they're gonna be HOT!
The performance enhancements for true duals proven by Dyno runs are usually in the mid to high range when you run true duals. They usually aren't as advantageous in the lower band and for some your low end torque might suffer a wee bit.
Where people run into issues is that they don't take full advantage of the true dual...you have increase flow on the back end but don't upgrade on the top end! With true duals more than likely a good grind of cam 211 or 225 will help you all the way around. Of course, Open the breathing up abit.
Now...let's talk about a good PC-V! Definitely I great way to spark life in your upgraded system!
True Duals can be a very nice set-up for the average rider! Easy to install...especially will slips on! The cams are a wee bit harder...if not comfortable...have a professional handle it!
Good luck in your choices abotu the True Duals...And yes...the sound is sweet!
I hope this helped...Ride Safe, Mike
The 2009 Crossover system running under the engine just serves to get the heat off your legs...yur bike will still get hot...trust me...I rode My friends '09 SG and you can still feel it...not as bad as My '08 SG...but it's still there. As long as they run EPA lean...they're gonna be HOT!
The performance enhancements for true duals proven by Dyno runs are usually in the mid to high range when you run true duals. They usually aren't as advantageous in the lower band and for some your low end torque might suffer a wee bit.
Where people run into issues is that they don't take full advantage of the true dual...you have increase flow on the back end but don't upgrade on the top end! With true duals more than likely a good grind of cam 211 or 225 will help you all the way around. Of course, Open the breathing up abit.
Now...let's talk about a good PC-V! Definitely I great way to spark life in your upgraded system!
True Duals can be a very nice set-up for the average rider! Easy to install...especially will slips on! The cams are a wee bit harder...if not comfortable...have a professional handle it!
Good luck in your choices abotu the True Duals...And yes...the sound is sweet!
I hope this helped...Ride Safe, Mike
Last edited by StreetGlideMedic; May 26, 2009 at 07:06 AM.
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Road Warrior
Joined: Dec 2008
Posts: 1,639
Likes: 2
From: Australia
The X over looks unreal, like its made for serious performance. The lines of it flow really well with the bike too i think. Show vs go i suppose. each to their own.
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Road Warrior
Joined: Mar 2008
Posts: 1,325
Likes: 12
From: SE Florida
I'm guilty of loving the True Duals and the sound at idle or low RPM. I really miss the low end grunt that disappeared with the TDs. But my neighbors '09 Ultra with Rinehart slip-ons sounds so fantastic that I'd probably go the same route, and Jamies PC-V set up and an a/c.
Road Warrior
Joined: May 2007
Posts: 1,497
Likes: 101
From: Portland, OR
I lost 2 hp and 4 TQ when I switched to true duels. I like the look and the sound.
When I had cams done, they had a hard time tuning the stock cross over with the cams I chose. The stock cross over had to much back pressure.
When I had cams done, they had a hard time tuning the stock cross over with the cams I chose. The stock cross over had to much back pressure.