True Duals
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Intermediate
Joined: Mar 2009
Posts: 40
Likes: 0
From: Northeast oklahoma
True Duals
I`m thinking of putting true duals on my 08 ultra classic. It is completly stock. Can any of you tell me what the advantages or disadvantages are? Thanks in advance. Ride Safe
Cruiser
Joined: Jun 2010
Posts: 180
Likes: 1
From: Minneapolis
YMMV, but mine (2" Rinehardts) were, of course, louder, and lost the low end power.
3500rpm and above? Watch out!
Low end, on the other hand, fuhgettaboudit. Couldn't use 6th gear much below 70mph, and a grade would force me back into 5th.
Put the old OEM setup back on, and grunt is back, mileage is better, and I can cruise all day long in 6th gear, even with a small headwind or grade.
3500rpm and above? Watch out!
Low end, on the other hand, fuhgettaboudit. Couldn't use 6th gear much below 70mph, and a grade would force me back into 5th.
Put the old OEM setup back on, and grunt is back, mileage is better, and I can cruise all day long in 6th gear, even with a small headwind or grade.
Road Warrior
Joined: Jun 2006
Posts: 1,993
Likes: 20
From: Southeast GA
True duals will help with the heat on the right side and make the bike sound better. I couldn't tell a difference in the low end torque although I knew that was part of changing to true duals.
Road Master
Joined: Nov 2004
Posts: 1,227
Likes: 2
From: Coral Springs, Florida
First of all, the bike needs a certain amount of back pressure, so "true duals" are a good way to start screwing things up. Second, opening up the exhaust, without opening up the intake makes no sense at all. (think about it). The easy, bullet proof, way to enjoy a some extra grunt. along with a nice mellow sound, is to simply go with the Stage 1 kit offered by Harley. The right balance between exhaust, intake, and ECM reprogram for around $1,000 will give you a completley trouble free, well engineered, package.
Harley also offers a Race Tuner (adjustable ECM programming) should you be thinking of future engine modifications.
Harley also offers a Race Tuner (adjustable ECM programming) should you be thinking of future engine modifications.
Road Master
Joined: Apr 2011
Posts: 911
Likes: 10
From: Wisconsin
Tru duals do help with heat. I rode a stock road king for 200 miles and the heat on the right leg was unbareable!
Mechanic is going to help my low end this winter with new cam when he does the tensioners.
Mechanic is going to help my low end this winter with new cam when he does the tensioners.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
yup, loss of torque.
Think about how much of your riding is below 3000 rpm, city stops and starts, on ramps etc.
'sound better' that's subjective, you can go to a bike night and see if you like the sound of duals better- of course the perspective is way different, rider or bystander.
mike
Think about how much of your riding is below 3000 rpm, city stops and starts, on ramps etc.
'sound better' that's subjective, you can go to a bike night and see if you like the sound of duals better- of course the perspective is way different, rider or bystander.
mike
Seasoned HDF Member
Joined: Sep 2009
Posts: 25,292
Likes: 2,427
From: Eastern NE
Unless you're drag racing the bike (pretty sure not) low-end torque isn't a problem. TD's will reduce heat + add sound & that's pretty much it.
Definitley will require air upgrade + tuner's nice for self-adjustment. I went w/Bub-7 TD's, LA Chopper's xXx breather & Dobeck TFI on my 09 FLHX & am extremely pleased w/results. Save some cash & let the upgrades begin...
Definitley will require air upgrade + tuner's nice for self-adjustment. I went w/Bub-7 TD's, LA Chopper's xXx breather & Dobeck TFI on my 09 FLHX & am extremely pleased w/results. Save some cash & let the upgrades begin...
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Road Master
Joined: Dec 2008
Posts: 1,183
Likes: 1
From: Las Vegas
I went with the setup that you see in my sig. Of course this is a 10 model and a 103ci so I dont know how much of a difference there is with your bike.
Some of the posts mention a loss of torque. All I know is the dyno on my bike gained about 6 and it feels healthy in all gears. Im also not too sure how much it helps with the heat issues, however it is supposed to. I like the sound of my setup, not too loud at idle/cruise but will sound off when twisting the throttle.
BTW, the TDs on my bike are routed a little different than the stock pipes (see sig pic), a little weird but I got use to it. Also, I had an indy do the complete setup and it was a little pricey. If I were to do it all over again I think I would have kept it stock and saved the money, but thats just me
Some of the posts mention a loss of torque. All I know is the dyno on my bike gained about 6 and it feels healthy in all gears. Im also not too sure how much it helps with the heat issues, however it is supposed to. I like the sound of my setup, not too loud at idle/cruise but will sound off when twisting the throttle.
BTW, the TDs on my bike are routed a little different than the stock pipes (see sig pic), a little weird but I got use to it. Also, I had an indy do the complete setup and it was a little pricey. If I were to do it all over again I think I would have kept it stock and saved the money, but thats just me
Last edited by MADHOG; Aug 4, 2011 at 12:30 PM.
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Intermediate
Joined: Mar 2010
Posts: 44
Likes: 0
From: Rockford, IL
I have an 08 Ultra and put Rineharts on mine. Everyone who posted about the lower heat is right on. I did my update over the winter so it was kind of hard to appreciate the difference. I had a chance to ride a stock bike after I did my update and could immediately tell the difference. There is about a 10 HP increase over stock. If there is a lose of low end torque as someone stated I sure did not notice it. You need to change the stock breather at the same time. Id does little good to increase the breath out if you can't take more in. This improvement requires a change in the ECM. You can use SE tuner or one of the many other ones on the market. I started with a Cobra R2000. It was OK for stage 1 but I had problems with fast idea, especially at high altitude. Last year I changed cam (TW-555) and went to PC-V w/Autotune. This took the bike to a whole new level. I would suggest going to something like the PC-V w/Autotune right away. Hope it helps.
Outstanding HDF Member
Joined: Apr 2009
Posts: 2,523
Likes: 3
From: Illinois
I keep hearing this "loss of low-end torque". This is complete horseshit if you do a complete stage 1. Look at any dyno-charts and tell me where true duals has less torque than stock. IT DOESN'T!!! It may not give you as much low-end torque as a 2 into 1, but it's DEFINITELY better than stock, period.
Below you'll see a copy of my dyno-chart with a Stage 1 base run with a canned map from Jamie at fuelmoto. This is with true duals. Will someone please show me where I lost torque ANYWHERE??? This was done prior to my cam installation.
There's nothing wrong with just changing exhaust if you're only looking for a different exhaust note, but if you want anymore performance at all, you've got to do a complete Stage 1.
Below you'll see a copy of my dyno-chart with a Stage 1 base run with a canned map from Jamie at fuelmoto. This is with true duals. Will someone please show me where I lost torque ANYWHERE??? This was done prior to my cam installation.
There's nothing wrong with just changing exhaust if you're only looking for a different exhaust note, but if you want anymore performance at all, you've got to do a complete Stage 1.
Last edited by jeff.georgalas; Aug 4, 2011 at 01:16 PM.