Building exhaust cans
 

Building exhaust cans


I've re-posted this here as more people look in this section

++I'm currently coring out a set of S*R exhausts,and have made decent progress.What I'll be left with is a shell into which I intend to put perforated tubing wrapped in blanket baffling,as in most racecans.
The inlet pipes seem to be about 40mm for each pipe,should I retain the same diameter for the perforated tubing?,or get larger bore tube?,45mm or even 50mm?
What should I be looking out for here?
I can get most of this stuff from A16 unless anyone knows anywhere better,I also need to make a rear blanking plate,really just to hold the tubing in position at the exit pipe,any suggestion as to what to make this from?,can I use aluminium?,as its easier to cut and shape(its what the sleeves seem to be made of) or will that distort or burn to much and mild steel be better- could I even use mesh?
Anyone else built there own cans?,what are the pitfalls?

The upside is that if I'm successful they will have cost a fraction of commercially available ones,and hopefully look good too.

If I've understood what you're trying to do correctly, the easiest way to hold the perforated tube in place at the tailpipe end would be to get a couple of short lengths of SS tube, the inside diameter of which is just slightly larger than the OD of the perforated tube. Weld the two short lengths of tube onto the back of the endcaps, so when you fit the endcaps the ends of the perforated tube slip into the 2 short pieces you just welded on. That's more or less how it's done on the Termi etc race cans.

As for diameter of perforated tube, it's pointless to increase the diameter unless the diameter of the tailpipe is bigger. Try to match the perforated tube diameter to the tailpipe diameter.

A16 should be able to supply everything you need.

Just my 2p worth!

Cheers, Neil.

Well,I've just ordered the 50mm tubing as its the only size I could get,I'll figure out the best way to put it all together when it arrives.
I think the commercial systems for the S4R and S2R are the same,can anyone who has one on their bike measure the internal diameter of the muffler for me?