 help me settle a debate @ my mechanic's shop, sort of a technical question |
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| KaptKaos |
 Sep 22 2010, 06:03 PM
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#41
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Family  Group: Members Posts: 4,009 Joined: 23-April 03 From: Near Wausau Member No.: 607 Region Association: Upper MidWest  |
QUOTE(SLITS @ Sep 22 2010, 04:42 PM)  You must have Ornamental pistons .... in their part of the world, most things are sideways. I had the heads off this spring. Pretty sure that there were no teeth in there either. (IMG:style_emoticons/default/av-943.gif) |
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| RJMII |
Sep 22 2010, 06:43 PM
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#42
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Jim McIntosh Group: Members Posts: 3,125 Joined: 11-September 07 From: Sandy, Utah Member No.: 8,112 Region Association: None |
Does anyone else see the irony that "Dead Air" asked a question about the existence of "Vacuum" in the engine cycle?
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| BiG bOgGs |
Sep 22 2010, 06:49 PM
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#43
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The Bogus One Group: Members Posts: 452 Joined: 25-September 04 From: Ft. Myers, FL 33967 Member No.: 2,829 Region Association: South East States |
Can't say because I wasn't there for the whole discussion with your shop teacher, but I am guessing that beyond trying to get his students to use proper scientific terms, he was probably trying to get across the idea that the amount of air in the cylinder depended on the present ambient air pressure because the amount of suction/negative pressure/vacuum remains the same for each stroke of the piston. Beyond this basic idea one can then start building on how changing things like the exhaust overlap can change some of the suction characteristics of the downstroke.
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