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Tractor Talk Discussion Board |
Re: Streight pipes on WORK tractors
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Posted by Farmall MD on July 30, 2007 at 01:26:16 from (205.188.116.74):
In Reply to: Re: Streight pipes on WORK tractors posted by old on July 29, 2007 at 20:43:27:
Old, I must say I always respect your opinion, but not this one. How can air be drawn back in? You have a piston coming up at full stroke with the valve open during this entire stroke at 2000 rpm. That is alot of pressure. The exhaust valve does not stay open past top dead center. So how can air be drawn back in? Even if it did stay open a little past top dead, cold air still could not be drawn in. A full stroke with valve open versus, say, 1/12th stroke with valve partly open(it's on it's way to being closed). Not hardly. Plus even if it did have a backdraft for just a slight time, the exhaust gasses would heat up the incoming anyway. There is no possible way for cold air to be drawn in the exhaust ports while engine is running, it is impossible. Doug N
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