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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Premium fuel causes backfire ?????
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<blockquote data-quote="davidd" data-source="post: 108973" data-attributes="member: 1177"><p>I know that fuel is a subject that I will never know well, but I think that the "slow burn" idea is more true with street fuel than race fuel, so it is probably fine to say it is slower burning. However, octane is a measure of how easily fuel flashes or ignites, not flame propagation speed. Flame propagation is relatively constant. Having said that, street fuel can be blended with slower burning blends to literally slow down the flame propagation. This is not done in race fuel.</p><p></p><p>I would have followed Chankly and checked for an air leak. I know this will cause backfires on over run, but I don't know about starting. I do know that engines that are lower in compression than the octane fuel is designed for tend to produce less power. I would change back if you had no detonation or pre ignition with the lower octane.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 108973, member: 1177"] I know that fuel is a subject that I will never know well, but I think that the "slow burn" idea is more true with street fuel than race fuel, so it is probably fine to say it is slower burning. However, octane is a measure of how easily fuel flashes or ignites, not flame propagation speed. Flame propagation is relatively constant. Having said that, street fuel can be blended with slower burning blends to literally slow down the flame propagation. This is not done in race fuel. I would have followed Chankly and checked for an air leak. I know this will cause backfires on over run, but I don't know about starting. I do know that engines that are lower in compression than the octane fuel is designed for tend to produce less power. I would change back if you had no detonation or pre ignition with the lower octane. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Premium fuel causes backfire ?????
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