looking inside a can.

denman · February 11, 2005, 02:13:37 PM

any one split a stock can down the middle to see what it looks like inside?

The Buddha · February 11, 2005, 02:47:37 PM

Not down the middle but I cut the back end off ...
The can has ~ 4-5 inches of nothing and then it has a round plate that blocks it off literally except for 2 holes about dime sized in that plate. A pipe appeard to be inserted into the holes ... I stuck a screw driver in the holes and 4 inches or so in front it seemed to hit a second plate. Possibly that plate has a single hole in center with dime sized pipe from the outlet. Its a mechanical baffle that squeezes the exhaust into the 2 holes, and then forces them to double back to enter that second dime sized hole to the open air. Maybe I should cut the other end too and put a pic up .... I try not to do stupid shaZam! like that cos I dont want to break the saw blades for my welder ... I dont want him to have extra down time because I'm running around his shop cutting up useless shaZam! ...
Cool.
Srinath.

geekonabike · February 11, 2005, 04:09:03 PM

Srinath,

That explains more vividly why they are so quiet, and why people get better performance from replacing them and rejetting. But I have to admit I like it quiet. Little kids and neighbors and all that.

--Miike D.

denman · February 12, 2005, 06:44:44 AM

thanks for the info,im thinking about guting out my can i have a friend that owns a muffler shop that will weld it back up for me. ya know free work is good. any one have any ideas one this? see y'all.

The Buddha · February 12, 2005, 04:27:47 PM

OK short of entirely taking the insides out I doubt you can make it higher flow. Now an empty can will be high flow but will be really unpleasant and not just in volume ... you want the can to sorta Brrrrruuuup brrrrupppp ... that will more likely be Dooom dooom doooom ... like a series of hard edged explosions instead of soft starting and building and fading explosions ... I know cos I have a can that got no insides that I have tried ... its pathetic ...
Cool.
Srinath.

denman · February 13, 2005, 08:00:28 AM

thanks i like dooom,but im not looking for extra loud. i'll post photos if i get krazy with a hacksaw. let me see how about i just buy a slipon and let it go at that. see y'all.

dgyver · February 14, 2005, 02:29:09 PM

Most aftermarket cans have a perforated tube in the center wrapped tightly with fiberglass packing material (some use stainless steel wool) then enclosed with the other sleeve. Nothing fancy. Bikes without packing in the cans are obnoxiously loud. If you want, I have some pics that I can post of a couple of M4 and Yosh cans that I took apart.

dyran · March 13, 2005, 03:54:38 PM

I'd like to see the pictures, I'm planning on putting a custom pipe together (and if it's good I may sell a couple)

Rema1000 · March 14, 2005, 01:05:23 PM

Quote from: seshadri_srinathI try not to do stupid shaZam! like that cos I dont want to break the saw blades for my welder ..

Wouldn't an air cut-off tool slice right through it?

dgyver · March 14, 2005, 01:25:10 PM

Quote from: dyranI'd like to see the pictures, I'm planning on putting a custom pipe together (and if it's good I may sell a couple)

I will try to remember to find the pics tonight and post them tomorrow.

dgyver · March 15, 2005, 07:36:10 AM

Here are a couple of pics of a M4 can and a Yosh RS3 Zyclone. The Yosh was on my TLR when I was rear ended, hence the damage. Basically, the inner baffle has a press fit on the end caps and the outer sleeve is riveted to the end caps, securing the assembly together. If needed, I can take more pics of the M4 can since I still have a couple of them but I have since sold the Yosh system.

M4 exhaust can internals
Yosh RS3 Zyclone exhaust can internals

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looking inside a can.