How to Make Hot Rod Exhaust Baffles / Mufflers for Side Pipes

This is a short video on how I built a set of baffles for my side pipe exhaust on the 1929 Ford Roadster hot rod. The result produce a decent sound and a quiet exhaust while testing in the shop. You can you the same idea for exhaust systems between the frame rails.
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[@oz_medias]

Cool, narration sounds like Dick Proenekke of Alone in the Wilderness.

[@AddictedtoProjects]

Hi There! Just wanted to say thank you for sharing your experience openly on KZbin. I've just spent 2 hours trying to find this kind of info, because I am building a straight through Harley exhaust, and I've been wrecking my brain on how I can quieten it down a bit without impeding gas flow too much. This design is brilliant!! :)

[@1929fordhotrod]

+mictho100 -- Thanks for your comments. This design can be modified with a choke valve and drilling a series of smaller holes in the donut rings so you could go with quite with the value closed to flow through with the valve open. I intend to incorporate this into the exhaust for my Corvette. Good luck with your project.

[@GradeABeaf]

Im trying to do the same on a Shadow 1100, funny how we both ended up here. Did you ever come up with a design, or find more info?

[@freeidaho-videos]

It has been 6 years by now. How are these mufflers working out? I have studied everything available to the public on muffler / baffle design and found this approach very interesting. I haven't seen anything else like it. Thank you!

[@1929fordhotrod]

These baffles are working out nicely with a great sound.

[@clipofthedayyup4907]

love it. great video. I am a sport bike enthusiast. not your typical annoying road going sport bike person mind you. I was looking for ideas to hell with my current exhaust. I found two ideas. yours and another that I may use either or combine to get the sound level and type off sound desired. thanks

[@carchemistryinc2992]

Have you tried Car Chemistry Inserts? They sound like open headers only quieter, without losing the quality of sound or performance. Rather than losing power, you can gain some!

[@1929fordhotrod]

I have looked at your inserts and they do look fine. I believe my design is less restrictive with a larger opening and incorporates back pressure to reduce the noise level.

[@vanillashake2]

If I wanted to scale this down, are there certain proportions I should follow to get adequate noise cancellation without too much back pressure?

[@1929fordhotrod]

You could make the baffle shorter or even use 2" pipe instead of the 2.5" pipes and drill the donut rings with 0.25" holes. Another idea would be to use half moon shapes and alternate the orientation of them throughout the pipe. I did this many years ago inside a 3" stainless pipe on a 70 Chev with a SBC with good results. .

[@vanillashake2]

Thanks for the information. By the way great instructional video too.

[@1929fordhotrod]

vanillashake2 Good luck & make sure your baffles are removable for adjustments to sound output. Thanks for the good feedback.