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Tech. Advice: Series 'D' 500cc/1000cc Bikes
Egli Headers/down pipes
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<blockquote data-quote="Speedtwin" data-source="post: 173325" data-attributes="member: 5012"><p>We found a racing twin (not a Vincent) on open pipes with cones notably easier to tune through the rev range on the dyno.</p><p>After 3500 rpm very noticeable.</p><p>Watched a tuner who specialises in land speed stuff tune a bike motor on a bed run without then run with, I had asked him about it which sparked my interest.</p><p>He had said that with it just made his task life easier to fine tune.</p><p>I am not a scientist he gave us the lowdown of wave pressure back pressure scavenging when it works best regarding intake versus exhaust onet hing which is clear after our use of for the last few years definitely doesn't reduce power does smooth out the tuning on open pipes.</p><p>At the time after some research we discovered they are very widely used in engines with short or open pipes. </p><p>Question for the aviation buffs wonder is this were they come from?</p><p>Al</p></blockquote><p></p>
[QUOTE="Speedtwin, post: 173325, member: 5012"] We found a racing twin (not a Vincent) on open pipes with cones notably easier to tune through the rev range on the dyno. After 3500 rpm very noticeable. Watched a tuner who specialises in land speed stuff tune a bike motor on a bed run without then run with, I had asked him about it which sparked my interest. He had said that with it just made his task life easier to fine tune. I am not a scientist he gave us the lowdown of wave pressure back pressure scavenging when it works best regarding intake versus exhaust onet hing which is clear after our use of for the last few years definitely doesn't reduce power does smooth out the tuning on open pipes. At the time after some research we discovered they are very widely used in engines with short or open pipes. Question for the aviation buffs wonder is this were they come from? Al [/QUOTE]
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Tech. Advice: Series 'D' 500cc/1000cc Bikes
Egli Headers/down pipes
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