Exhaust Home made beer can exhaust pipe!

[Dean]

Feelinalright,

Congrats on a great build!

I wonder though, if it would've been cheaper and easier to build the muffler more like a simplified version of a commercial muffler, like what you'd buy for your car.

The copper pipe stuck in the "drinking-hole-end" is good for a start, but on the other end, just drill the hole for the header pipe, but offset it towards the opposite side of the can.
Stick both pipes in as far as you can (leaving some of the copper tube sticking out the other end). If the header pipe bottoms on the end of the can, pull it out about 1" (25mm).
Weld or otherwise seal the pipes to the can.
You'll want to muffle it with something. Wrap some fiberglass, or any kind of heat resistant material that has some thickness to it, around the can (don't forget the ends) and then either wrap some tape around the material to help hold it on, or wrap some sheet metal (maybe parts from another can or two?) around the material and seal the seams.

voila, one muffler.

If you wanted to get fancy, you could drill a few small relief holes in the side of each pipe and make sure they look at each other, when the muffler's assembled.

I'm not totally sure that one is any simpler or cheaper to build than yours, but I'm thinking it might be a bit quieter.

...that and you get to drink more red bull before you get started on the project (weee!).


Anyway, nice to see ingenuity reigning supreme.




Dean

 

[fastboy9]

ye good idea! gonna give that a go, much better way!

update: after about 7 miles though the can went brittle and got loads of holes in it, so I would only reccomend this as a temporary solution, or perhaps use a more robust can, maybe a pressurized one, like a deoderant can. Also perhaps experimenting with aluminium cans and steel cans may yeild different results.

 

[will_start]

I did a post on using red bull can, in Jan 2008
I still have that muffler too as a backup.
check it
http://www.motoredbikes.com/showthread.php?t=8488&highlight=red+bull

 

[Dean]

I did a post on using red bull can, in Jan 2008
I still have that muffler too as a backup.
check it
http://www.motoredbikes.com/showthread.php?t=8488&highlight=red+bull

WE HAVE A WINNER!

...and I believe his name is "Will Start".
Man, talk about taking it down to its lowest common denominator!
Half a pop can filled with steel wool and let the gas escape out of the drinking hole.
As the Guiness brothers would say (in the TV ads) "BRILLIANT!".

Thanks for posting that Will.




Dean

P.S. my apologies for mistaking "fastboy9" for "feelinalright".

 

[sparky]

I don't have a pic, but a few years back I used a shaving cream can with excelent results since it is made out of steel, it can be welded. So the end result is extremely durable, probably more than the engine itself.

DANNGGGG... Dunno how I missed this post. GREAT tip, hotsauce!

 

[Dadkins1]

I tried a striaght piece of aluminum tube the other night - about 8" long perfect size for the header hole - I was a little worried about lack of backpressure but that did not seem to be an issue. The issue... Noise. That thing sounded like a full blown 125 motcross engine with an aftermarket LOUD pipe. Utterly obnoxious ! But.... I could noticeably feel the additional power and additional rpm too. It was too obnoxious to leave on so I ended up modifying my muffler opening up the small exits quite a bit and adding an internal baffle. It's a little louder but NOTHING like the staright pipe. I plan to build a pipe soon perhaps I will document the bvuild and post it here.

 

[SimpleSimon]

Well, I don't drink beer, but I bought a Heineken kegster full and split the cost with the Marine Corps sergeant who lives downstairs. Just so I could have the empty keg, which I've modified into a fuel tank, carefully not obscuring or damaging the labelling. It will be the fuel tank on my trike when I get it finished and motorized.

The mounting straps are 3/4 inch wide 8 gauge brass, very carefully shaped to the curve of the keg and JB Weld bonded in place. I think it is nice looking, and once in use will be pretty unique. I gotta get some pictures taken of it.