true duels
Road Captain
Joined: Jul 2005
Posts: 610
Likes: 1
From: New Jersey
RE: true duels
A put a Mustang touring seat onmy RK, which is narrower in the nose. Son after, my right leg, wich was warm before, was scorching. Once I put the true duals on the heat issue wa resolve. I have not noticed any sign of reduced torque, although I was told the system would do so. By the way, true duals are also supposed to increase top end, but that may be measured and not felt too.
Advanced
Joined: May 2007
Posts: 64
Likes: 0
From: Van. Canada
RE: true duels
I have noticed most people with duals have V&H
what are the opinions on
BassaniÂŽ Power Curve Crossover
thanx for your input...
what are the opinions on
BassaniÂŽ Power Curve Crossoverthanx for your input...
Tourer
Joined: Dec 2007
Posts: 265
Likes: 14
From:
RE: true duels
My mother was an english major and this thread is giving me flashbacks![:@]
On subject now, I saw a sideby side torque curve dyno sheet between the Bassani Power Curve and the Bassani Road Rage 2 into 1. The Power Curve had a slight dip at low rpm but recovered quickly and ran fairly close the rest of the way. I have had both pipes, although on different bikes, and liked them. The Road Rage really woke my modified Evolution up compared to stock headers with slip ons. The Power Curve looks and sounds great and my keester meter likes it too but the dyno would know the difference. It comes down to, are you racing or riding?
On subject now, I saw a sideby side torque curve dyno sheet between the Bassani Power Curve and the Bassani Road Rage 2 into 1. The Power Curve had a slight dip at low rpm but recovered quickly and ran fairly close the rest of the way. I have had both pipes, although on different bikes, and liked them. The Road Rage really woke my modified Evolution up compared to stock headers with slip ons. The Power Curve looks and sounds great and my keester meter likes it too but the dyno would know the difference. It comes down to, are you racing or riding?
Outstanding HDF Member
Joined: Apr 2006
Posts: 2,282
Likes: 52
From: DFW
RE: true duels
ORIGINAL: Jsans
Because stock pipes don't balance the output. Stock pipes are not duals, they are actually 2 into 1s, this is why there is HP loss with duals. 80% of the exhaust comes out the right side pipe on stock pipes. The left pipe is partially obstructed. (hope i spelled everything right)
ORIGINAL: GliderXXX
Cool pipes but why not just stay with the stock headers with slip on's then?
ORIGINAL: Jsans
I'm going with the "untrue duals". Bub 7 with crossover pipe. Balanced oiutput with no low-end torque loss.
I'm going with the "untrue duals". Bub 7 with crossover pipe. Balanced oiutput with no low-end torque loss.
Tourer
Joined: Aug 2007
Posts: 407
Likes: 0
From:
RE: true duels
ORIGINAL: GliderXXX
I understand how stock pipes work, as well as 2-1's and duals, guess I just don't understand the BUB crossover. It seemed to be the same thing as the crossover pipe on stock headers.
ORIGINAL: Jsans
Because stock pipes don't balance the output. Stock pipes are not duals, they are actually 2 into 1s, this is why there is HP loss with duals. 80% of the exhaust comes out the right side pipe on stock pipes. The left pipe is partially obstructed. (hope i spelled everything right)
ORIGINAL: GliderXXX
Cool pipes but why not just stay with the stock headers with slip on's then?
ORIGINAL: Jsans
I'm going with the "untrue duals". Bub 7 with crossover pipe. Balanced oiutput with no low-end torque loss.
I'm going with the "untrue duals". Bub 7 with crossover pipe. Balanced oiutput with no low-end torque loss.
Stock pipes emulate 2 into 1s, since the left pipe is partially obstructed, which allows 80% of the exhaust to escape out the right pipe. 2 into 1 pipes provide the best low end torque and HP. Supposedly has something to do with backpressure.
True Duals provide more higher-end HP, less lower-end. This is usually compensated by the use of a tuner and dyno, therefore the end result is equal to or slightly better than the stock configuration.
Introducing a cross-over pipe on a balanced exhaust system improves lower-end torque and HP. (In the 70's we had dual exhaust systems on cars which would utilize a cross-over pipe for the purpose of getting better low-end torque and HP.)
I have read many threads where true dual owners have dead or weak spots at around 2500 rpm, but indicate that they recover quickly, but is still noticable. I'm sure that proper tuning through mapping and a/c configuration can overcome this in most cases.
I'm not sure what these Bub 7 crossovers are going to be like, since I haven't put them on yet. They use a stepped header technology running from 1 7/8" to 2". I was concerned with having HP loss with pipes this large in a strictly true-dual configuration, so I went with the crossover.
So just putting slip-on muffler systems on stock headers doesn't resolve the issue where 80% of the exhaust comes out the right side. You might as well get 2-1 that uses a ghost pipe.
If I don't like the Bub 7s, I won't hesitate to chuck em. But based on what I've been told, they're supposed to be damn good pipes with a deep throaty sound and excellent performance.
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Outstanding HDF Member
Joined: Apr 2006
Posts: 2,282
Likes: 52
From: DFW
RE: true duels
ORIGINAL: Jsans
GliderXXX
Stock pipes emulate 2 into 1s, since the left pipe is partially obstructed, which allows 80% of the exhaust to escape out the right pipe. 2 into 1 pipes provide the best low end torque and HP. Supposedly has something to do with backpressure.
True Duals provide more higher-end HP, less lower-end. This is usually compensated by the use of a tuner and dyno, therefore the end result is equal to or slightly better than the stock configuration.
Introducing a cross-over pipe on a balanced exhaust system improves lower-end torque and HP. (In the 70's we had dual exhaust systems on cars which would utilize a cross-over pipe for the purpose of getting better low-end torque and HP.)
I have read many threads where true dual owners have dead or weak spots at around 2500 rpm, but indicate that they recover quickly, but is still noticable. I'm sure that proper tuning through mapping and a/c configuration can overcome this in most cases.
I'm not sure what these Bub 7 crossovers are going to be like, since I haven't put them on yet. They use a stepped header technology running from 1 7/8" to 2". I was concerned with having HP loss with pipes this large in a strictly true-dual configuration, so I went with the crossover.
So just putting slip-on muffler systems on stock headers doesn't resolve the issue where 80% of the exhaust comes out the right side. You might as well get 2-1 that uses a ghost pipe.
If I don't like the Bub 7s, I won't hesitate to chuck em. But based on what I've been told, they're supposed to be damn good pipes with a deep throaty sound and excellent performance.
ORIGINAL: GliderXXX
I understand how stock pipes work, as well as 2-1's and duals, guess I just don't understand the BUB crossover. It seemed to be the same thing as the crossover pipe on stock headers.
ORIGINAL: Jsans
Because stock pipes don't balance the output. Stock pipes are not duals, they are actually 2 into 1s, this is why there is HP loss with duals. 80% of the exhaust comes out the right side pipe on stock pipes. The left pipe is partially obstructed. (hope i spelled everything right)
ORIGINAL: GliderXXX
Cool pipes but why not just stay with the stock headers with slip on's then?
ORIGINAL: Jsans
I'm going with the "untrue duals". Bub 7 with crossover pipe. Balanced oiutput with no low-end torque loss.
I'm going with the "untrue duals". Bub 7 with crossover pipe. Balanced oiutput with no low-end torque loss.
Stock pipes emulate 2 into 1s, since the left pipe is partially obstructed, which allows 80% of the exhaust to escape out the right pipe. 2 into 1 pipes provide the best low end torque and HP. Supposedly has something to do with backpressure.
True Duals provide more higher-end HP, less lower-end. This is usually compensated by the use of a tuner and dyno, therefore the end result is equal to or slightly better than the stock configuration.
Introducing a cross-over pipe on a balanced exhaust system improves lower-end torque and HP. (In the 70's we had dual exhaust systems on cars which would utilize a cross-over pipe for the purpose of getting better low-end torque and HP.)
I have read many threads where true dual owners have dead or weak spots at around 2500 rpm, but indicate that they recover quickly, but is still noticable. I'm sure that proper tuning through mapping and a/c configuration can overcome this in most cases.
I'm not sure what these Bub 7 crossovers are going to be like, since I haven't put them on yet. They use a stepped header technology running from 1 7/8" to 2". I was concerned with having HP loss with pipes this large in a strictly true-dual configuration, so I went with the crossover.
So just putting slip-on muffler systems on stock headers doesn't resolve the issue where 80% of the exhaust comes out the right side. You might as well get 2-1 that uses a ghost pipe.
If I don't like the Bub 7s, I won't hesitate to chuck em. But based on what I've been told, they're supposed to be damn good pipes with a deep throaty sound and excellent performance.