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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Exhaust Components
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<blockquote data-quote="davidd" data-source="post: 61450" data-attributes="member: 1177"><p>Maybe Eddie will shunt us off into a Racing Pipes thread so we aren't diverting Steve's thread! </p><p></p><p></p><p></p><p>There are always lots of compromises to make in racing. I had some bad experiences with low pipes hitting the ground and this became a real issue when we were required to install oil catch pans under the engine. The pans took up all the tight and high space under the engine. Additionally, silencers became mandatory and this means there is just not enough space down below. I know many organizations have not adopted these two rules, the silencer and the catch pan, but I knew that they were coming. The biggest motivation was the large amount of time and cost involved in building and testing exhaust systems. Lots of dyno time, lots of track testing and lots of cost building and modifying the pipes. The bottom line is that it is difficult to develop an exhaust system unless you commit to the routing first. If you develop a low pipe it is unlikely that you will be successful in making it a high pipe if it becomes necessary. The development will be quite new if you have to switch to a high pipe. When I made the decision to switch I had to build a new seat, seat frame and modify the F106 to make the high route work. So, I would say that I am committed to it now.</p><p></p><p>Greg does not have the same rules to worry about. I am quite happy with the rules I run under. The oil catch pan is something I would do even if there were no rule. It does keep oil off the track even with a tight motor. I am also happy with the silencer rule. It requires a more sophisticated approach to the exhaust (which I have not yet stumbled across), but gents like McIntosh have developed nice systems with an increase in power.</p><p></p><p>Here is a center pipe I used years ago when racing the Grey Flash:</p><p></p><p>[ATTACH=full]12650[/ATTACH] </p><p></p><p>The shadow on the track makes it hard to see, but if you have to add a catch pan and a silencer of any length it gets tough. I was using 19" wheels also.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 61450, member: 1177"] Maybe Eddie will shunt us off into a Racing Pipes thread so we aren't diverting Steve's thread! There are always lots of compromises to make in racing. I had some bad experiences with low pipes hitting the ground and this became a real issue when we were required to install oil catch pans under the engine. The pans took up all the tight and high space under the engine. Additionally, silencers became mandatory and this means there is just not enough space down below. I know many organizations have not adopted these two rules, the silencer and the catch pan, but I knew that they were coming. The biggest motivation was the large amount of time and cost involved in building and testing exhaust systems. Lots of dyno time, lots of track testing and lots of cost building and modifying the pipes. The bottom line is that it is difficult to develop an exhaust system unless you commit to the routing first. If you develop a low pipe it is unlikely that you will be successful in making it a high pipe if it becomes necessary. The development will be quite new if you have to switch to a high pipe. When I made the decision to switch I had to build a new seat, seat frame and modify the F106 to make the high route work. So, I would say that I am committed to it now. Greg does not have the same rules to worry about. I am quite happy with the rules I run under. The oil catch pan is something I would do even if there were no rule. It does keep oil off the track even with a tight motor. I am also happy with the silencer rule. It requires a more sophisticated approach to the exhaust (which I have not yet stumbled across), but gents like McIntosh have developed nice systems with an increase in power. Here is a center pipe I used years ago when racing the Grey Flash: [ATTACH=full]12650[/ATTACH] The shadow on the track makes it hard to see, but if you have to add a catch pan and a silencer of any length it gets tough. I was using 19" wheels also. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Exhaust Components
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