Baffles for megaphone exhaust

by dorsey

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Autos

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Semi-finished parts, still need shaping and fit-up: baffle tubes, flanges, and internal spacers. Three pieces per baffle.
Click to enlarge click to enlarge


Semi-finished parts, still need shaping and fit-up: baffle tubes, flanges, and internal spacers. Three pieces per baffle.


Engine compartment showing Sanderson Lakester™ header with megaphone.
Click to enlarge click to enlarge


Engine compartment showing Sanderson Lakester™ header with megaphone.



http://www.makemania.com/widwimg/332/277/b_DSC00090_305x230.jpg
Semi-finished parts, still need shaping and fit-up: baffle tubes, flanges, and internal spacers. Three pieces per baffle.
http://www.makemania.com/widwimg/332/277/b_DSC00092_305x230.jpg
Rough fit-up to confirm baffle tube diameter.
http://www.makemania.com/widwimg/332/277/b_DSC00093_305x230.jpg
Final fit of the flange to the baffle tube before welding.
http://www.makemania.com/widwimg/332/277/a_DSC00033_305x230.jpg
Engine compartment showing Sanderson Lakester™ header with megaphone.
http://www.makemania.com/widwimg/332/277/a_DSC00001_305x230.jpg
Finished baffle bolted in place ready to testing. I didn't bother removing the underbody muffler connection because very little exhaust will route that way with the baffle in place rather than the block-off plate.
Description

Because I couldn't find baffles for Sanderson Lakester™ headers on my 1929 Ford Hiboy roadster, I decided to fabricate a set.  The goal is to find something streatable so I can remove the underbody exhaust system.

I used 16 gauge perforated plate for the baffle tube and 10 gauge sheet for the internal spacer and flange.  I positioned the spacer behind the rear exhaust tube in the cone with a tight fit to prevent vibration and also to for seal the baffle in place.

These look good and are quieter than an open megaphone, but are way too load for daily driving as-is.  Once I find a material that I can wrap the baffle tube with that will not burn up or blow out, I'll try them again.

Supplies
  • 1. 16 ga perforated plate Metals Supermarket View
  • 2. 10 ga carbon steel plate Metals Supermarket View
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