JohnBoy wrote on 06/21/09 at 13:53:30:...and I can't wait to see what diamond jim has up his sleeve.
JB
JohnBoy, here's where I'm at. This is a one piece baffle with an internal section that slides into the pipe and an external section that slides about an inch over the end of the pipe.
In this pic, the red lines illustrate the exhaust pipe. The yellow is the internal diffuser plate.
The exhaust hits the first plate of the diffuser cone where some goes through the small center hole while most goes around, hits the shoulder of the diffuser then gets forced through the small diffusing holes of the cone at a 90 degree angle. Then the exhaust does another 90 degree angle and proceeds through the second diffuser plate (yellow) then out the bell-shaped end. On the diffuser cone, I slowly added holes and tested until the pressure was reduced and the tone deepened. So, it's 90 degree bend, diffuser, 90 degree bend, diffuser, exit. It's pretty darn free-flowing and because it's a deep tone it really doesn't sound that loud.
Still gotta prep and paint. I run with it at the Dragon this weekend.