Do lollipops help lower exhaust noise?
#31
I have V&H twin slash and in an effort to "take the edge off", I made lollipops out of washers and some that I welded the hole shut. Using a decibel meter I down loaded to my phone the results were 1no lollipops 93db avg,2 lollipop with hole 92db avg,3 solid lollipop 90db avg. All were checked at idle. 14 SGS stage 1 no cat. I'm planning to order the TTI inserts to compare out of curiosity. The lollipops were installed straight down, didn't experiment with angles. Your results may vary!
#32
I have V&H twin slash and in an effort to "take the edge off", I made lollipops out of washers and some that I welded the hole shut. Using a decibel meter I down loaded to my phone the results were 1no lollipops 93db avg,2 lollipop with hole 92db avg,3 solid lollipop 90db avg. All were checked at idle. 14 SGS stage 1 no cat. I'm planning to order the TTI inserts to compare out of curiosity. The lollipops were installed straight down, didn't experiment with angles. Your results may vary!
#33
Lollipops will help, and they work fine with EFI. The Thunder Torque Inserts are a significant step up from lollipops, anywhere from 2-3x's the increase in low and mid range torque, plus they do a better job at deepening the tone (deeper tones sound quieter to the human ears).
We do autotunes with the Power Vision and the FP3 all the time with the TTI's. Because of the unique design (patented) of the W version of the TTI's, they virtually eliminate reversion...this is a big benefit when autotuning.
We do autotunes with the Power Vision and the FP3 all the time with the TTI's. Because of the unique design (patented) of the W version of the TTI's, they virtually eliminate reversion...this is a big benefit when autotuning.
Thanks!
#34
Join Date: Nov 2010
Location: Red Banks, Mississippi
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I have V&H twin slash and in an effort to "take the edge off", I made lollipops out of washers and some that I welded the hole shut. Using a decibel meter I down loaded to my phone the results were 1no lollipops 93db avg,2 lollipop with hole 92db avg,3 solid lollipop 90db avg. All were checked at idle. 14 SGS stage 1 no cat. I'm planning to order the TTI inserts to compare out of curiosity. The lollipops were installed straight down, didn't experiment with angles. Your results may vary!
https://www.hdforums.com/forum/sport...lollipops.html
If you are running baffles, then get the W118's, if you are running no baffles, then get the W158's.
Video below is not the same bike, but it is the same principle-
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#35
Here is a link to a report from a guy that did what you are thinking about. He had his own lollipops he made, then he swapped them out for some TTI's.
https://www.hdforums.com/forum/sport...lollipops.html
If you are running baffles, then get the W118's, if you are running no baffles, then get the W158's.
Video below is not the same bike, but it is the same principle-
https://www.youtube.com/watch?v=oLORhshZcDc
https://www.hdforums.com/forum/sport...lollipops.html
If you are running baffles, then get the W118's, if you are running no baffles, then get the W158's.
Video below is not the same bike, but it is the same principle-
https://www.youtube.com/watch?v=oLORhshZcDc
Will the TTI W158 bolt fit thru the existing hole used for securing the baffle?
#36
#37
Join Date: Nov 2010
Location: Red Banks, Mississippi
Posts: 17,786
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Contrary to the very popular myth, back pressure is not need on a HD engine to create torque...an absence of reversion is what gives that low & mid range torque, everything else being equal.
The myth is kept alive because most systems use baffles (which create back pressure) to reduce reversion.
BUT, to get a serious reduction in sound levels, while not increasing back pressure, the best solution is to use a large, cheese grater style, baffle, with some some packing around the outside of the baffle, then use a TTI at the end of the baffle.
The packing will absorb a lot of the sound, the large baffle will not create much power robbing back pressure, and the TTI will reduce/eliminate the torque robbing reversion.
#38
Normally yes, but V&H uses a smaller diameter baffle retaining bolt than everyone else. So you will need to drill it out just a little larger...or drill a new hole.
And that is the beauty of the patented design of the TTI's. With the "W" version there is a negligible increase in back pressure, while there is a huge reduction in reversion, along with a deepening of the tone (which sounds quieter to the human ears).
Contrary to the very popular myth, back pressure is not need on a HD engine to create torque...an absence of reversion is what gives that low & mid range torque, everything else being equal.
The myth is kept alive because most systems use baffles (which create back pressure) to reduce reversion.
BUT, to get a serious reduction in sound levels, while not increasing back pressure, the best solution is to use a large, cheese grater style, baffle, with some some packing around the outside of the baffle, then use a TTI at the end of the baffle.
The packing will absorb a lot of the sound, the large baffle will not create much power robbing back pressure, and the TTI will reduce/eliminate the torque robbing reversion.
And that is the beauty of the patented design of the TTI's. With the "W" version there is a negligible increase in back pressure, while there is a huge reduction in reversion, along with a deepening of the tone (which sounds quieter to the human ears).
Contrary to the very popular myth, back pressure is not need on a HD engine to create torque...an absence of reversion is what gives that low & mid range torque, everything else being equal.
The myth is kept alive because most systems use baffles (which create back pressure) to reduce reversion.
BUT, to get a serious reduction in sound levels, while not increasing back pressure, the best solution is to use a large, cheese grater style, baffle, with some some packing around the outside of the baffle, then use a TTI at the end of the baffle.
The packing will absorb a lot of the sound, the large baffle will not create much power robbing back pressure, and the TTI will reduce/eliminate the torque robbing reversion.
#39
#40
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