Omar's 3 into 1 GT750 exhaust

[jabcb]

I ordered the 3-into-1 from Omar's a while ago.
Called Omar's a few days ago & they said that the holdup is at their supplier.

Omar's offered a refund that I declined.
I haven't gotten some of my bikes out of winter storage yet, so there's plenty to do while I wait.

[tz375]

My Norwegian friend tested a figaroli 3 into 1

That's one pipe I have very little information on. The only one I have seen had parallel headers and after the collector it was also a parallel tube up to the end which looked like a baffle cone and muffler.

What did the H2 exhaust look like?

[ja-moo]

I'll see if I can get a picture.....

[jeff kushner]

What did the H2 exhaust look like?

Here is a nice pic TZ:

http://www.google.com/imgres?imgurl=htt ... =0&ndsp=29" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

I saved the pic but have no access to my photobucket here at the office but if you can't pull it up this way, PM me and I'll email it to you. Something is odd though since as you scroll down, there are 3 outlets but it sure looks like they are joined underneath on the right side?

jeff

[tz375]

Just out of idle curiosity, I took a MOTA file for a motor with TR7590 type ports and changed teh pipe from TR to a simple header plus collector plus dump pipe to simulate what I suspect that pipe may be like and it gave substantially more low and mid range than the TR pipe and it gave more than a mild porting with a good street pipe. I did use some pretty arbitrary variables for pipe length and diameter and the wave characteristics of the collector.

There's a whole lot of variables that are not well defined but the model really looks like a conventional chamber with short cones and a very long belly and that's how it appears to work. The sudden step at the collector sends a negative pressure wave up to evacuate the cylinder and the stuffing wave comes from the closed end. I have no ability to model the effect of wave force dilution form all those interfering waves, but I suspect that the top end will be lower than predicted.

I tried a couple of short collector transitions and the more abrupt it is, the worse the top end but it's not as bad as one might expect.