I/S piggy length???

[custom1]

I am working on a way to replace the piggies on my I/S. The original owner cut them and drilled some of the baffles. What is the length of the originals. Are they all the same or staggered? I am sort of doing an experiment to see if I can get rid of the drone even though the baffles are drilled. I can make them all straight because I am going to use the 4" truck stacks that came with it.

Thanks John

[moreira72]

The piggys on my I/S are all the same lengh. They look like they are about 1/2 inch shorter than the exhaust tip

[custom1]

Can you tell me the length of the stock exhaust tip? I don't have one, just the stacks.
The stacks start turning before the end of the bags, so I may not be able to make them as long as the originals anyway. I may play around with the lengths to try and "tune" the sound some.

Thanks

[moreira72]

The stock exhaust tip is 15 Inches long. and the factory muffler can and heat shield are 18 inches long

[custom1]

Ok Thanks. I'm off to the garage. Will start a new thread with the results and pics if this works.

[Ricky-D]

Those four inch truck stacks are probably more responsible for the drone that bothers you than the three little piggies that are in each end of the stock mufflers.

I doubt you find any relief with a re-do of the piggies.

The length of the exhaust protruding out from the rear of the bike will have a greater affect on attenuating the drone. Again, the direction to where the exhaust is pointed is also a large part of the drone equation.

Helmets are seeming to be the largest co-conspirator when discussing drone, so picking a helmet becomes very important when hoping to reduce the drone effect.

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[custom1]

Sorry to disappoint Ricky. Actually you are right. It is the stacks that cause the drone. Adding the piggies eliminates the stacks. Please see the thread here. http://www.valkyrieforum.com/bbs/index.php/topic,35893.0.html