Home made exhaust?

[FlavMeister]

what's involved in making your own slip-on exhaust canister? Riveting is easy, cutting sheet metal is easy, packing wool is easy... what about the internals? anybody ever done this?
I couldn't find info anywhere on the net... what's involved?

Thanks

[D.T.]

I think Vance & Hines and Supertrapp make lots of individual parts you can buy to "make your own." The problem is getting the tools and equipment to be a "manufacturer for a day." Going to different shops to "borrow" their tools can be quite a process. www.mcmaster.com sells a lot of raw materials and tools to get started.

Junkyards and Ebay can help. I have been trying to get an Akrapovic on Ebay for my SV but even ones that aren't for and SV can really be expensive. I don't know if the expense is worth buying a made for SV pipe is worth it or not. I was thinking of the slip on from Yosh, the Titanium one. Seems like the cheapest price new is $300. :rolleyes:

I hate the sound of the stocker, even drilled.

[sandie]

you can get a scorpion slip on for less than that...look around in the forsale section here for group buys for them

[Burst]

the canister is not packed with wool. Wool would burn up in about 2 minutes. The packing material is fiberglass which is coated with some chemical to help prevent it from burning up.

As far as making the canister... would'nt be *that* difficult if you have the proper tools... you will need a mandrel tubing bender, a swedger, welder(tig preferable but mig will work) lathe, drill and rivet gun.

If you take on the project please post up the result as I'd like to see it.

[VFR750RR]

Actually, the hardest part is finding the perforated core. What I did was I measured the dimensions of the M4 Can used on the SV and found someone selling an M4 can on Ebay. I had them measure it up and guess what exact same size. I believe it was for a 600 yamaha. All I needed then was 1 U-Bend and a section of straight pipe and some creative cutting on the U-Bend and a completed slip on for under $50.

Joe

[twf]

yosh and M4 canisters(oval) share dimensiones.I made one using parts from both.

[Burst]

you can make the perforated core easily enough... just a drill press and a jig. this will also allow you to fine tune the sound you want. the size and number of holes in the core will determine how much sound ends up in the packing...

[Mohawk]

Originally posted by Burst
the canister is not packed with wool. Wool would burn up in about 2 minutes. The packing material is fiberglass which is coated with some chemical to help prevent it from burning up.


He was probably refering to rockwool which is used.

[SV650sk3]

Well if you just want a cannister and not a muffler, all you need is a hollow cylinder with inlet and exhaust holes. Try folgers!

[FlavMeister]

what would be the consequence of having a totally empty can? Too much flow, too lean a mixture? damage the engine?
I'm not all too concerned about the noise. I know it would be damn loud..

Does anybody have a picture of a sliced-up muffler? i've never looked into them. I guess the best way of going about it would be to buy a wrecked slip-on and open it up to see how it's made.

I might take on the project this summer. I'll post pics if I do, and do a write-up.

Also, I've made my own handlebars, designed with CAD and welded the tubes. It's quite nice, changes the position to more aggressive riding, gives way better feel than before.
but I guess that's another story...

will post article when I have some time!

ANYWAY, back to the slip-on. Anybody can tell me what the perforated core is for? can I "skip the step"?

thanks

[dodgy]

The perforated core 'lets' the noise get into the sound absorbing fibres (Two Bros use a mix of stainless and fibreglass, for heat and sound qualities). It also holds the packing in place.
I guess you could simply make up a continuation of the headers as if it was just a straight through pipe, then drill lots of holes in the last 18" or so, then wrap it with insulation and slide the outer canister on?

Here's my one.... (http://www.socalsvriders.org/forums/showthread.php?s=&threadid=9016&highlight=home+built)

[dsv1000]

the best way to make a perforated core is to go to your local sheet metal shop (ims here in socal) and get some perferated sheet metal and two pieces of pipe one slightly smaller than your core and one with a id that you want the od of yuor core to be. cut the perf to your circumfrence, put it on a vice with the smaller piece on top of it, hit it with a hammer bending it around the pipe .
Once you get a decent form put it inside the larger pipe and insert the smaller one to keep for. As to hammer it through th larger pipe tack weld it as it comes out about every 1/2" or so. when you are done you will have a perfectly round perferated pipe, just cut to your length

[Eeyore]

I have a couple yosh cores. I will see how long they are and get back to you. In the past I have put aftermarket cores in the stock cans to have the look of a stocker but the sound of the race can. It works pretty well and looks stock for the cops.

[FlavMeister]

what works best as packing material?
How come scorpion slip-ons don't ever have to be repacked? what is used in them?

Also, yeah it'd be great to know the dimensions of the inner core. What's the hole ratio on the core? i mean, how much material should be removed?

thanks

[Aeteocles]

scorpions use a single continuous strand of steel wool that is wrapped around the perfed core. because the strand is continuous, you don't lose any packing without losing all of it