Homemade Baffles

I have had a few members ask for some photos of these so here they are, with a brief explanation.

I have good pipes but the previous owner had banged the insides out to make them louder. I did not like the sound nor could I go get my motorcycle endorsement with the loud sound they made. So I set off to find another set of pipes or new insides. No luck for my budget so I made my own baffles.

I started out by cutting from a piece of metal a circle just big enuf to fit inside the end of the muffler pipe. I then took a few inches, I think 3, of copper pipe and drilled holes in it. I drilled a hole into the circle of metal circle the size of the pipe, 3/4 inch. I used an electrical coupling to join the pipe to the metal plate.

** Note: The coupling was galvanized. I had to remove the galvanized coating so it would not put off toxic gas when heated by the exhaust. I placed it in a kiln for about an hour, it just cooked off. **

Looking up into the exhaust pipe, I need some sound deading material so I bought muffler packing from JC Whitney and cut a two inch wide by about six inch long strip and rolled it up. I placed it into the pipe and let it unroll to fit along the sides of the muffler pipe.

The I installed the baffle to hold it together. I drilled three holes into the metal left over from the wack job and the metal circle, I used a metal screw to secure it in place.

To help the threads from the coupling disappear I used JB Weld to fill them in. I also spray painted them flat black to look better till they turn black anyway.

I did not like the sound without the packing material. I did not like the sound with too much either. You can kinda " Tune " your sound by adding more or less material.

I Hope this helps to those who want to do this as well. Ask questions and I will try to help. I I did not think to take pictures until I was about done so they sre not as detailes as I like.

 

Great idea! I'm glad I thought of it...
I just used a couple of big washers the correct size for inside the mufflers with short tabs welded on them to mount them with small sheet metal screws. The electrical coupler is an ingenious idea if you are using copper tubing. I used steel tubing and welded the tubes to the washers instead.
Of course you can change the sound by the size of the hole in the outlet plate (or washer) and the number/size of the holes in the tubing. With the right setup, you don't even need to use the fiderglass baffle material.

 

PainterD, I would have used steel or anything else for the pipe. I just had the copper pipe around.