Unbaffled exhaust tuning tip from nightrider

[messed up]

Used to put them in Honda 305 scrambler headers, had a knob and spring so you could close the washer and quiet them down when you got to town. I'm sure some here might remember how they went together.

[acoolmf]

I put an eye bolt in my drag pipes when I had a sporty 1200. I dyno it first and had a lag or saddle in the torque and Hp on the dyno sheet. An old guy who raced Harleys told me to do the bolt instead of cones or baffels and it worked great. While dynoing the bike I used a 2x4 to determine how much restiction I need and a single bolt was not enough. When I went to the eye bolt, Hp and torque went from a drop in the midrange in both to a linear curve and I could smoke the tires no problem

[Hotrodjohn71]

I did EXACTLY what MBSKEAM did in his photos.
I first installed the washer/bolt setups in the holes that held the original baffels  which were about 6-8 inches from the end of the pipe. Then I saw a thread from a guy who dynoed his bike and showed heat progression in the pipes in a thermal image. He said 1 1/2" from the end of the pipe was best so I plugged the hole for the stock baffles and drilled holes 1 1/2" and turned the lollipops about 45 degrees and it sounds good and runs good too.

[ARBY]

Back when every mother's son in 8 county's, was into throwing the biggest pipe on their bike, when those first came to market,(IE 2 1/4", and larger), we manufactured "torque nozzles" from 6061 aluminum bar here.
Slip-fit on the O.D., 1" long, and 1.600" thru hole, with a 10* taper, which faced the front of the pipe, and then, with a 1/4-20 drilled/tapped hole thru, to attach to the pipe.
On the dyno, you could make pulls, and increase the I.D. by .060" at a time, 'till the bottom of the torque curve would just start to fade. Done.
Tried to get Drag to take them on, but they said they'd have 'em made offshore if they were interested. Thank's!!
Submitted them to Zippy's as well. Never heard a peep, as I believe both, probably thought that something that simple, couldn't possibly work.
The bolt/nut works well in 1 3/4" drag pipes, and another thing we had witnessed, is to cut them straight, not a baloney cut.
Scott

Do you have any pics of those torque nozzles?

[Burnout]

https://www.youtube.com/watch?v=KjKUKhHQLHg


I always laugh at slash cut drag pipes...

Fashion is smashin!

Denial is not a river in egypt.

[Hossamania]

Slash cut drags are the best sounding pipe on a Shovel. Best looking too!

[Jako1]

Slash cut drags are the best sounding pipe on a Shovel. Best looking too!

[HotRodShovel]

This is an outstanding video by S&S about tuning pipes specifically drag pipes.  Well worth the look.https://www.youtube.com/watch?v=KjKUKhHQLHg