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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
poor quality repop silencers
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<blockquote data-quote="Howard" data-source="post: 59787" data-attributes="member: 271"><p>I think we're in danger of tunnel vision here. The silencer won't suddenly give 6 bhp more than standard, we're not going to boost a standard Rap to 51 bhp. I suspect the new VOCSC silencer will give more or less the claimed 45 bhp, and less well designed silencers will give less power. Don't forget, the power probably comes from less back pressure, that will make it necessary to rejet the carbs to take advantage, and to make sure you don't run too weak.</p><p></p><p>Jim, I think you're reaching the limit of good acceleration at 80 mph on a Rap if you change up there. Not only is the acceleration starting to tail off, but you drop the engine speed which reduces the power available, if I want good acceleration I stay in third till well into three figures.</p><p></p><p><a href="http://www.vincent-hrd.co.uk/story.html" target="_blank">http://www.vincent-hrd.co.uk/story.html</a></p><p></p><p>H</p></blockquote><p></p>
[QUOTE="Howard, post: 59787, member: 271"] I think we're in danger of tunnel vision here. The silencer won't suddenly give 6 bhp more than standard, we're not going to boost a standard Rap to 51 bhp. I suspect the new VOCSC silencer will give more or less the claimed 45 bhp, and less well designed silencers will give less power. Don't forget, the power probably comes from less back pressure, that will make it necessary to rejet the carbs to take advantage, and to make sure you don't run too weak. Jim, I think you're reaching the limit of good acceleration at 80 mph on a Rap if you change up there. Not only is the acceleration starting to tail off, but you drop the engine speed which reduces the power available, if I want good acceleration I stay in third till well into three figures. [URL]http://www.vincent-hrd.co.uk/story.html[/URL] H [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
poor quality repop silencers
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