Do all true duals kill torque?
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Joined: Jan 2006
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RE: Do all true duals kill torque?
You don't think? Let see you running a free flowing air filter and a pc-3. & I have a bone stock 2006 RK running nothing but a set of custom built smooth bore mufflers making 70.3 hp and 78.8 lbs. tq. Yea the true duals hurt tq.
ORIGINAL: maineultraclassic
No torque loss here................none at all.
That is with the new '06 Rineharts with the stock baffles, Ness Big Sucker, PCIIIusb, and stock motor.
Here is a quote from HeadQuarter's website -
" NEWS FLASH!!!! John’s Performance in Washington state gets 92.4 HP and 96.4 foot pounds of torque from a stock 88 cubic inch 2006 Street Glide using a Head Quarters HQ-0034 bolt in cam, Power Commander and Rhinehart Tru-Duals. Great work John!! "
I don't see any mention of torque loss there either.
Steve
ORIGINAL: blk06rk
All true duals hurt TQ. on other wise stock motors, Anybody tells you different is fooling theirself or don't know what their talking about, Some of the loss can be made up by adding other power adders like free flowing air filters, PC-3's and so on. True dual setups lower backpressure and lower backpressure kills Tq. And yes you will feel it.
All true duals hurt TQ. on other wise stock motors, Anybody tells you different is fooling theirself or don't know what their talking about, Some of the loss can be made up by adding other power adders like free flowing air filters, PC-3's and so on. True dual setups lower backpressure and lower backpressure kills Tq. And yes you will feel it.
That is with the new '06 Rineharts with the stock baffles, Ness Big Sucker, PCIIIusb, and stock motor.
Here is a quote from HeadQuarter's website -
" NEWS FLASH!!!! John’s Performance in Washington state gets 92.4 HP and 96.4 foot pounds of torque from a stock 88 cubic inch 2006 Street Glide using a Head Quarters HQ-0034 bolt in cam, Power Commander and Rhinehart Tru-Duals. Great work John!! "
I don't see any mention of torque loss there either.
Steve
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Road Master
Joined: Sep 2005
Posts: 1,190
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RE: Do all true duals kill torque?
Do I ride w/my wife..sure. That doesn't mean I'm racing though cause I want to not lose any torque due to exhaust. I like to be able to accellerate out of a situation though without always having to drop a gear or 2 as I've read some others have to. Sounds like the new rineharts got the bugs worked out of them.
Banned
Joined: Jan 2006
Posts: 146
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RE: Do all true duals kill torque?
You not reading what I wrote [other wise stock bike] The big power bike your talking in the 90s is running a custom cam and fuel management system.
ORIGINAL: maineultraclassic
No torque loss here................none at all.
That is with the new '06 Rineharts with the stock baffles, Ness Big Sucker, PCIIIusb, and stock motor.
Here is a quote from HeadQuarter's website -
" NEWS FLASH!!!! John’s Performance in Washington state gets 92.4 HP and 96.4 foot pounds of torque from a stock 88 cubic inch 2006 Street Glide using a Head Quarters HQ-0034 bolt in cam, Power Commander and Rhinehart Tru-Duals. Great work John!! "
I don't see any mention of torque loss there either.
Steve
ORIGINAL: blk06rk
All true duals hurt TQ. on other wise stock motors, Anybody tells you different is fooling theirself or don't know what their talking about, Some of the loss can be made up by adding other power adders like free flowing air filters, PC-3's and so on. True dual setups lower backpressure and lower backpressure kills Tq. And yes you will feel it.
All true duals hurt TQ. on other wise stock motors, Anybody tells you different is fooling theirself or don't know what their talking about, Some of the loss can be made up by adding other power adders like free flowing air filters, PC-3's and so on. True dual setups lower backpressure and lower backpressure kills Tq. And yes you will feel it.
That is with the new '06 Rineharts with the stock baffles, Ness Big Sucker, PCIIIusb, and stock motor.
Here is a quote from HeadQuarter's website -
" NEWS FLASH!!!! John’s Performance in Washington state gets 92.4 HP and 96.4 foot pounds of torque from a stock 88 cubic inch 2006 Street Glide using a Head Quarters HQ-0034 bolt in cam, Power Commander and Rhinehart Tru-Duals. Great work John!! "
I don't see any mention of torque loss there either.
Steve
Cruiser
Joined: Feb 2006
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RE: Do all true duals kill torque?
I've heard others mention having to downshift too. Hasn't been a problem for me. My torque curve did shift a couple hundred RPM to the midrange, I think anyway. I don't have a dyno chart from before to after for comparison. I wouldn't say that the duals "kill" torque. Maybe just a small bruise.
Everbody at the local HD shop who has ridden "Flash" like the setup and performance for a daily rider. I'm not lookin' for 100 hp right now anyway. I did have the same apprehentions about swapping out the headers as you. I'm glad I made the change.
Just like your wife's comment, with 100 degree temps my legs were fryin' in slower traffic. Doesn't seem to be as big an issue now.
Everbody at the local HD shop who has ridden "Flash" like the setup and performance for a daily rider. I'm not lookin' for 100 hp right now anyway. I did have the same apprehentions about swapping out the headers as you. I'm glad I made the change.
Just like your wife's comment, with 100 degree temps my legs were fryin' in slower traffic. Doesn't seem to be as big an issue now.
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Road Master
Joined: Sep 2005
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RE: Do all true duals kill torque?
Pathfinder, thanks for the reply. Which baffles did you get?
I just called Bub and talked to Ken in tech support for 10 minutes and asked a bunch of questions regarding the old design, the new design, what was different etc...
He explained the new design has a baffle with a chamber in it to make more backpressure than the "old" style baffle. On a stock 88 and even a 95" motor they did see a dramatic DIP on the dyno sheets. They now have a performance baffle as well as a quiet baffle. He suggested to get the quiet baffle. You'll see an increase in trq, but about a 4hp peak loss at 5k rpm but more than make up for it on the bottom end according to him.
I just called Bub and talked to Ken in tech support for 10 minutes and asked a bunch of questions regarding the old design, the new design, what was different etc...
He explained the new design has a baffle with a chamber in it to make more backpressure than the "old" style baffle. On a stock 88 and even a 95" motor they did see a dramatic DIP on the dyno sheets. They now have a performance baffle as well as a quiet baffle. He suggested to get the quiet baffle. You'll see an increase in trq, but about a 4hp peak loss at 5k rpm but more than make up for it on the bottom end according to him.
Thread Starter
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Road Master
Joined: Sep 2005
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RE: Do all true duals kill torque?
ORIGINAL: 100thRK
These threads are always so interesting to read. It is always the same people saying the same thing.
These threads are always so interesting to read. It is always the same people saying the same thing.
Well, except for me
I like the SE slipons...if I end up getting more complaints though as the weather gets hotter I will look at going to another setup. I plan on doing some motor work over the winter so it wouldn't be a bad thing either.
Cruiser
Joined: Oct 2005
Posts: 167
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From: Georgetown, Texas
RE: Do all true duals kill torque?
I have been running with a TFI and a set of V&H ovals for the first 4K miles. Just added the True Duals and what a difference. Not sure what the numbers are but I can certainly tell I have more power. What a feeling!!!
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RE: Do all true duals kill torque?
The J&P Cycles catalog has a couple of products called either Porker "Performance Exhaust Tork Valves". (#440-389)
http://www.jpcycles.com/productgroup.aspx?GID=4E36C90B-6CD3-46D2-B057-8C2DEED4A43C&brand=porker
or Milwaukee Twins "Power Cones". (#4400180)
http://www.jpcycles.com/productgroup.aspx?GID=610273E4-5658-4B32-A935-33E6DED0F6FB&brand=milwaukeetwins
They fit into the motor end of the header and are supposed to create back pressure that is lost when installing a freer flowing exhaust sytem, "Improving torque, throttle response and horsepower". I don't know anyone who has used them, so I can't say whether they really make a difference or not. It would be interesting to hear from anyone who is or has used them. Anybody?
http://www.jpcycles.com/productgroup.aspx?GID=4E36C90B-6CD3-46D2-B057-8C2DEED4A43C&brand=porker
or Milwaukee Twins "Power Cones". (#4400180)
http://www.jpcycles.com/productgroup.aspx?GID=610273E4-5658-4B32-A935-33E6DED0F6FB&brand=milwaukeetwins
They fit into the motor end of the header and are supposed to create back pressure that is lost when installing a freer flowing exhaust sytem, "Improving torque, throttle response and horsepower". I don't know anyone who has used them, so I can't say whether they really make a difference or not. It would be interesting to hear from anyone who is or has used them. Anybody?