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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
I need a drawing of ET84, exhaust nut
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<blockquote data-quote="johnmead" data-source="post: 34511" data-attributes="member: 776"><p>Howard,</p><p>When the exhaust valve opens and the exhaust gases run down the pipe there is a reversion pulse that comes back up the pipe along the outside of the inside diameter. This is the pulse that you use to "tune" your exhaust so that when the pulse reaches back to the combustion chamber it blocks some of the mixture coming in through the now open intake valve (during cam overlap) from going out and down the exhaust. The problem is that this pulse timing changes as the rpms change so you can only tune it for a narrow rpm range.</p><p></p><p>Using an anti-reversion trap in the exhaust allows you to tune the exhaust system for a wider rpm range which gives you a wider power band. The "trap" is a pocket around the outside diameter inside the exhaust pipe that blocks the reversion pulse from getting to the combustion chamber. I am going to have this trap machined into the adapter.</p><p></p><p>There are several US patents on this system. The ones that I looked at were submitted by the late <em>Jim</em> Feuling and <em>Rivera Engineering.</em></p><p><em></em></p><p><em>John</em></p><p><em></em></p></blockquote><p></p>
[QUOTE="johnmead, post: 34511, member: 776"] Howard, When the exhaust valve opens and the exhaust gases run down the pipe there is a reversion pulse that comes back up the pipe along the outside of the inside diameter. This is the pulse that you use to "tune" your exhaust so that when the pulse reaches back to the combustion chamber it blocks some of the mixture coming in through the now open intake valve (during cam overlap) from going out and down the exhaust. The problem is that this pulse timing changes as the rpms change so you can only tune it for a narrow rpm range. Using an anti-reversion trap in the exhaust allows you to tune the exhaust system for a wider rpm range which gives you a wider power band. The "trap" is a pocket around the outside diameter inside the exhaust pipe that blocks the reversion pulse from getting to the combustion chamber. I am going to have this trap machined into the adapter. There are several US patents on this system. The ones that I looked at were submitted by the late [I]Jim[/I] Feuling and [I]Rivera Engineering. John [/I] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
I need a drawing of ET84, exhaust nut
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