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	<title>Supercharger Performance and Engine Performance Parts &#187; cutout</title>
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	<link>http://www.superchargerperformance.com</link>
	<description>Supercharger performance news and home of the supercharger calculator</description>
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	<itunes:summary>This podcast covers:
Supercharger News (OEM cars, kits, modifications)
Supercharger Q&amp;A session
Interviews with tuners and owners
Featured cars</itunes:summary>
	<itunes:author>Haitham Alhumsi</itunes:author>
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		<itunes:name>Haitham Alhumsi</itunes:name>
		<itunes:email>mr.humsi@gmail.com</itunes:email>
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	<managingEditor>mr.humsi@gmail.com (Haitham Alhumsi)</managingEditor>
	<copyright>@Supercharger Performance 2010</copyright>
	<itunes:subtitle>Supercharger performance news and home of the supercharger calculator</itunes:subtitle>
	<itunes:keywords>Supercharger, Performance, Cars, Automotive</itunes:keywords>
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		<title>Supercharger Performance and Engine Performance Parts &#187; cutout</title>
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		<item>
		<title>Supercharger boost control</title>
		<link>http://www.superchargerperformance.com/supercharger-power-parts/supercharger-boost-control</link>
		<comments>http://www.superchargerperformance.com/supercharger-power-parts/supercharger-boost-control#comments</comments>
		<pubDate>Wed, 06 May 2009 01:02:35 +0000</pubDate>
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				<category><![CDATA[Supercharger Power Parts]]></category>
		<category><![CDATA[crank pulley]]></category>
		<category><![CDATA[cutout]]></category>
		<category><![CDATA[pulley upgrade]]></category>
		<category><![CDATA[snout pulley]]></category>
		<category><![CDATA[Supercharger]]></category>
		<category><![CDATA[water injection]]></category>

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		<description><![CDATA[Tweet   Supercharger boost pressure controls how much additional horsepower your engine will make from using the supercharger. One of the simplest modifications that can increase supercharger performance is increasing the supercharger drive ratio to allow the supercharger to spin faster and move more air, thus creating more boost pressure. First an overview of the supercharger drive ratio. In a typically supercharger installation, the supercharger is driven by the engine&#8217;s serpentine pulley and belt system. Because the supercharger is connected to the crankshaft on the same belt, there is an obvious drive ratio between the supercharger and the engine based on the respective pulley sizes.    For example, if the crank pulley is 4&#8243; in diameter, then for every rotation of the motor the belt moves 2*pi*r which is about ~25 inches. If the supercharger had a snout pulley that were 2&#8243; in diameter, and there was NO BELT SLIP, then 25 inches of belt rotation will cause the supercharger to spin by 25/(2*pi*r) = 2 complete rotations. To simplify things, the supercharger drive ratio is exactly the ration between the diameter of the crank pulley to the supercharger pulley or in our example 4:2 which is 2:1.  It becomes [...]


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</ol>]]></description>
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