Thanks..more
I bought 180deg U-bends in 304 Stainless, some straight pipe, went at it. Pipe is more expensive to buy than I had hoped.
I have some good and some not so good welds on the system. Like I said trial by fire. The worst being within and around the "collector" as I have named it, where the 45mm merges to the 57mm. Here I MIG welded a bit too. That was more difficult than I thought and I had it in my head to redo parts if I liked it. With that said, internally I paid close attention to grind smooth the backsides of the collector portion. I wanted the exhaust gas inertia to work in my favor since I knew velocity would fall as the system volume opened up within the 57mm piping. So the collector pipes are merged tightly, welded, and knife edged internally. In case your wondering, I bought another stock midpipe to hack for this project. It gave me an easy way to connect to the 45mm stock pipes even if I only needed two inches! I am pretty happy with the welding most everywhere else though and the stock system will bolt right back on at any time.
As for the Tips...Yes, I tossed it around in my head if I liked it that way. Sometimes I still do at certain angles. I tried it pointing out and it really looked strange. Pointing straight back would be more normal. I'll sit on it for a while since I do like that the angles flow with the bodywork...
I actually expected other comments about the brand I guess. Probably not a commercially viable system for that reason.
Sound..It sounds meaner but more tonally civilized (maybe!) is the only way I can describe it. My old system was more raspy and metallic so it isn't a good comparison.
It sounds wayyy deeper, more big bike sounding. Still a Duc though in a major way (open clutch cover too). The quick revving is what gets me. It starts to sound nasty! I am wishing I had a Nichols flywheel right now since that would just add to the fun.
I also spent alot of time studying other exhausts and their allowed clearance for that pipe that crosses over the tire.
With me on the bike it has plenty but I need to put a passenger on it and see how it works. Trying to get 2 1/4" pipe high and tight was harder than I thought especially since I didn't want to 'cheat' (grind a staight at an angle which reduces crossection) the pipe diameter in certain sections. I need too make a heat shield too. Time to try my hand with Carbon Fiber I guess. I have some experience here too but for entirely different industrial applications.
All in all it has been fun and yet now the fun has just begun.
Thanks for the comments. I will post the dyno numbers. I am real curious myself....sometime soon
