sweet! i want a drag pipe, keep me posted!!

(a start a second one, ill need it!)

Nix, it fits my 1.75" OD pipe.  I made it from galvanized pipe and two fittings like this:

Cool

They have been talking about popsicle baffles somewhere.

How about a spring loaded one that opens up and full throttle?

That is what the spiral baffles are all about.  The one I use on the savage is a double spiral (minimal spiral around the outside wall, tighter spiral around the next inside wall) and then a 1.6" straight through section in the middle.
My discription is rather simplistic, but the idea behind the design is that the unit provides backpressure in the low range, but as engine speed & exhaust velocity increases, the air flow changes from mostly going through the spirals to mostly going through the straight area (straight area has perforations along the inside wall that breaks up sound)
The length, width, spiral design  and such is supposed to create a vacuum effect at the back end of the muffler in order to PULL exhaust gases out of the pipe when near wide open throttle.
Works really good and sounds really good.

Savage_Amusement wrote on 03/08/09 at 05:10:10:


I'm with you SA.  Lancer, how do get/fab one of these?

John_D FSO wrote on 03/08/09 at 21:58:52:


How about these:
http://cgi.ebay.com/ebaymotors/Harley-Power-Spiral-Baffles-1-3%2f4-inch-Pipes...

Guys, those are great ideas, finds and thoughts.  Thanks for the feedback.

On Saturday, my wife told me I needed to go to Mike's Merchandise in Guntersville, AL.  Man, this store is a dream come true.  That store rocked!  It had tons of stuff that I've never seen at any other store.  I picked up a bunch of stuff including what I'm now using as a baffle.  I have no idea want the steel tube that I used is for but it was shaped like this:



I then did these following steps to the pipe, including attaching it to the coupling I used in the first pics in this thread.



Lastly, I did the triangular pushed-in design that you see on some baffles.  Instead of several small ones, I did ten rather large ones.  The triangular tabs almost reach arcross to the other side of the inside of the pipe.  



The end result is awesome.  The coupling acts sort of like a cone and adds what seems like the right amount of back pressure at all RPMs.  The long baffle takes up about 2/3rds of the pipe length, breaks up the sound pulses, and being only slightly narrower than the pipe helps keep the deep sound of the pipe.  It's just what I've been looking for.

Performancewise, my bike has a sweet spot at about 62mph.  This is the spot where I'm just cruising and the engine, bike and me simply feel in harmony.  You just feel it.  Nine times out of ten when I'd get in that zone and glance at the speedo it would be between 60-62.  With this pipe and baffle, I found myself in that sweet spot a few times yesterday.  When I glanced down, the speedo showed 70-72mph.   That's a new one for me with all the baffle attempts.