<html><body bgcolor="#FFFFFF"><div>Dear Toby and all</div><div><br></div><div>Th compression ratio of the engine is a purely mechanical concept, the ratio of the cylinder volume at bottom dead center to that at top dead center, BDC/TDC. To this must be added any extra onto pressure from turbocharging,</div><div><br></div><div>Simple thermodynamics predicts and practice shows that both power and efficiency increase linearly with CR. Since producer gas has an octane over 180, various groups have been "souping up " gas engines, using CR in excess of 18/1. Little old producer gas has grown up.</div><div><br></div><div>Tom Reed. BEF</div><div> <br><br>Dr Thomas B Reed<div>President, The Biomass Energy Foundation</div><div><a href="http://www.Woodgas.com">www.Woodgas.com</a></div></div><div><br>On Feb 25, 2011, at 15:45, Toby Seiler <<a href="mailto:seilertechco@yahoo.com">seilertechco@yahoo.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td valign="top" style="font: inherit;"><div>Bill and list,</div>
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<div>Thanks for the post concerning compression ratio. </div>
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<div>I'm under the impression that a small amount of positive pressure on the intake has a large effect in the engine power, in comparison to a vacuum intake. How do you think a gas and air pressure of 2-5 pounds or so, would affect the compression ratio / efficiency if one is using low pressure in producer gas making? </div>
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<div>Perhaps someone has density information/chart and the way to relates to compression ratios. </div>
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<div>Best regards,</div>
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<div>Toby <span>Seiler</span></div>
<div>Seilertechco</div></td></tr></tbody></table><br>
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