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	<title>Supercharger Performance and Engine Performance Parts &#187; Porting</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:owner>
		<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; Porting</title>
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		<item>
		<title>Positive displacement supercharger modifications</title>
		<link>http://www.superchargerperformance.com/supercharger-performance-tips/positive-displacement-supercharger-modifications</link>
		<comments>http://www.superchargerperformance.com/supercharger-performance-tips/positive-displacement-supercharger-modifications#comments</comments>
		<pubDate>Fri, 24 Apr 2009 07:39:30 +0000</pubDate>
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				<category><![CDATA[Supercharger Performance Tips]]></category>
		<category><![CDATA[engine performance parts]]></category>
		<category><![CDATA[Porting]]></category>
		<category><![CDATA[Positive Displacement]]></category>
		<category><![CDATA[Rotor]]></category>
		<category><![CDATA[supercharger performance]]></category>

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		<description><![CDATA[Tweet Positive displacement superchargers do not usually compress air inside the supercharger but rather better described as air pumps. Positive displacement superchargers are usually rated in liters or cubic inches (or a similar measure of displacement). The reason behind that is that a 1.5L rated positive displacement supercharger moves 1.5 liters of air per revolution and so to produce 15psi of boost (or a pressure ratio of 2.0) on a 1.5 liter engine, the supercharger would have to be geared to double the rotating speed of the engine. Thus for every round of the engine, the engine would normally ingest 1.5 liters of air, at the same time for every round of the engine, the supercharger completes two full rotations because of the gearing between the engine crank and the supercharger, and thus the supercharger puts out 3.0 liters of air for every 1 revolution of the engine. The result is that the supercharger pumping and feeding 3.0 liters of air to a 1.5 liter engine, which results in the air being compressed inside the intake manifold between the cylinder and the supercharger, and effectively forcing the engine to breathe twice as much air, simulating a motor that is twice [...]


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<li><a href='http://www.superchargerperformance.com/supercharger-power-parts/supercharger-performance-for-an-eight-three-eight-camaro' rel='bookmark' title='Permanent Link: Supercharger performance for an eight three eight Camaro'>Supercharger performance for an eight three eight Camaro</a></li>
<li><a href='http://www.superchargerperformance.com/supercharger-power-parts/supercharger-snapshot-whipple-supercharger-performance' rel='bookmark' title='Permanent Link: Supercharger Snapshot &#8211; Whipple Supercharger Performance'>Supercharger Snapshot &#8211; Whipple Supercharger Performance</a></li>
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