Pipe dent

Joe Ricard · Posted: Mon Dec 10, 2012 11:16 am Post subject: Pipe dent

how much of a dent is too much. This weekend I had a "racing incident" and got a dent in each end of the pipe.

one on the curve before the cone and one on the other end at the end of the cone.

anyone have a decent pipe for local races.
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Arrow AX-8/ Rotax Sr.

Jeremy Inns · Joined: 05 Jul 2012 Posts: 2

I'd say any dent more than a 5cm radius ( Sorry for the metric, I'm Australian ) would have a change on performance as you would be compressing more of the exhaust gas.
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Arrow X2-28N coming soon

Joe Ricard · Posted: Tue Dec 11, 2012 6:33 am Post subject:

Thanks that's why I asked. I understand the theory of how the pipe works just not how things like this change things.

on my ICC I changed silencers once and it did all kinds of wonky things. From a large ID inner tube to a smaller ID inner tube. I guess that increased the pressure up top also and I found detonation on the piston top. Changed back after new piston. Argh.
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Arrow AX-8/ Rotax Sr.