True Duals = how much low end is really lost ??
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Outstanding HDF Member
Joined: Feb 2007
Posts: 2,976
Likes: 49
From: Northern California
True Duals = how much low end is really lost ??
I have looked for dyno charts of before and after just the true dual headpipes. All I seem to find is ones where different mufflers, Air cleaners and other things added.
Does anyone have one with the only difference being just true duals??
Or how about feedback from your riders perspective on felt power difference.
FWIW my bike is a 2004 88 inch with Andrews 21 cams and PCV with autotune.
I hate having to mess with the factory headpipes on my 2004 and having a true dual setup seems so much easier. I need to replace a clutch cable and add a new ball and ramp soon
I am eyeballing the Fullsac ones with O2 bungs as I have a auto tune setup.
Does anyone have one with the only difference being just true duals??
Or how about feedback from your riders perspective on felt power difference.
FWIW my bike is a 2004 88 inch with Andrews 21 cams and PCV with autotune.
I hate having to mess with the factory headpipes on my 2004 and having a true dual setup seems so much easier. I need to replace a clutch cable and add a new ball and ramp soon
I am eyeballing the Fullsac ones with O2 bungs as I have a auto tune setup.
Last edited by bigheadted; Jan 20, 2016 at 12:26 PM.
Not enough to fret over.
Unless:
A. You are looking for thousandths on the drag strip
B. You are paper racing your buddies with dyno sheets.
Otherwise, run what you like.
I have TD's, and there aren't many other Stg 1 bikes around that can keep up with me.
Unless:
A. You are looking for thousandths on the drag strip
B. You are paper racing your buddies with dyno sheets.
Otherwise, run what you like.
I have TD's, and there aren't many other Stg 1 bikes around that can keep up with me.
Grand HDF Member
Joined: Aug 2014
Posts: 4,726
Likes: 1,787
From: Toledo ohio
I had a 2010 Ultra and had V&H Big Radius, as true of duel as you can get without racing tubes. I was a fan of Thundermax but my buddy talked me into trying a power commander and he would dyno tune it to perfection. Well I am here to tell you, my low end power went in the tank. From 3500 up, it was a beast for what I had in it (stock engine). I ended up trading for 2011 Limited and had the slip-on mufflers, a/c and tmax. It had nearly twice the low end take off power (where I mostly run in the twistys and the town.
Having said that, if you get a full system with somewhat of baffles, you won't notice much difference like Safetyman says.
Having said that, if you get a full system with somewhat of baffles, you won't notice much difference like Safetyman says.
Intermediate
Joined: Oct 2014
Posts: 41
Likes: 0
From: Indiana
I also have the 21s and fulsac conversion. Did the duels at the same time of cam upgrade. With that being said I can say it sounds a lot better and more low end torque with the 21s! Going to upgrade to power vision with aut tune this year.(running fuel pac now) Wish I would have thought about O2 bungs last year! If you wouldn't mind Ted if needed could I maybe get a map from ya? Not a lot of maps available for 88s with 21s. I was told by fuel Motto they could get me close. Sorry so long
Tourer
Joined: Apr 2007
Posts: 338
Likes: 42
I went to the Fulsac true dual conversion because of a cracked Y-pipe on my stock TC88 RKC .....didn't change anything else and can't tell the difference. Cheaper on ebay.
Last edited by chromepony; Jan 20, 2016 at 02:16 PM.
Seasoned HDF Member
Joined: Jul 2007
Posts: 6,336
Likes: 67
From: SW Minnesota
The TC88 had a **** poor design, in that you could not remove the cover to replace the the clutch cable, without removing the head pipes, which were Y'd together.
Having replaced my clutch cable this past summer on my '06, I truly wish I had invested in true dual head pipes. It was a real b*tch putting the head pipes back on. Talk about poor engineering! No way should we have to take off an entire exhaust system just to replace a clutch cable!
Having replaced my clutch cable this past summer on my '06, I truly wish I had invested in true dual head pipes. It was a real b*tch putting the head pipes back on. Talk about poor engineering! No way should we have to take off an entire exhaust system just to replace a clutch cable!
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I have looked for dyno charts of before and after just the true dual headpipes. All I seem to find is ones where different mufflers, Air cleaners and other things added.
Does anyone have one with the only difference being just true duals??
Or how about feedback from your riders perspective on felt power difference.
FWIW my bike is a 2004 88 inch with Andrews 21 cams and PCV with autotune.
I hate having to mess with the factory headpipes on my 2004 and having a true dual setup seems so much easier. I need to replace a clutch cable and add a new ball and ramp soon
I am eyeballing the Fullsac ones with O2 bungs as I have a auto tune setup.
Does anyone have one with the only difference being just true duals??
Or how about feedback from your riders perspective on felt power difference.
FWIW my bike is a 2004 88 inch with Andrews 21 cams and PCV with autotune.
I hate having to mess with the factory headpipes on my 2004 and having a true dual setup seems so much easier. I need to replace a clutch cable and add a new ball and ramp soon
I am eyeballing the Fullsac ones with O2 bungs as I have a auto tune setup.
One thought when it comes to the loss of low and mid range performance, DK Custom Products Thunder Torque Inserts were designed to increase low and mid range torque and improve the sound of the pipes by reducing engine pumping losses and increase exhaust gas velocity and scavenging.
There are two models of TTI's available, the 'W' model and the 'Q' model which can be used either with or without baffles. With the 'Q' model installed you will get less sound volume, especially at cruising RPM and under throttle. With the patented 'W' model you'll have a deeper sound through the RPM range and under throttle; the 'W' model will also provide an increase in torque over the 'Q' model.
You can read additional information along with videos on the Thunder Torque Inserts at this link HERE
You can see fitment information on the TTI's at this link HERE
There are two models of TTI's available, the 'W' model and the 'Q' model which can be used either with or without baffles. With the 'Q' model installed you will get less sound volume, especially at cruising RPM and under throttle. With the patented 'W' model you'll have a deeper sound through the RPM range and under throttle; the 'W' model will also provide an increase in torque over the 'Q' model.
You can read additional information along with videos on the Thunder Torque Inserts at this link HERE
You can see fitment information on the TTI's at this link HERE
__________________
www.DKCustom.com
662-252-8828 Voice
662-420-4891 Text & Voice
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www.DKCustom.com
662-252-8828 Voice
662-420-4891 Text & Voice
Support@DKCustomProducts.com