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	<title>Supercharger Performance and Engine Performance Parts &#187; Head Porting</title>
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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; Head Porting</title>
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		<title>Head porting for lower boost and higher power</title>
		<link>http://www.superchargerperformance.com/aftermarket-supercharger-performance/head-porting-for-lower-boost-and-higher-power</link>
		<comments>http://www.superchargerperformance.com/aftermarket-supercharger-performance/head-porting-for-lower-boost-and-higher-power#comments</comments>
		<pubDate>Wed, 22 Jul 2009 10:13:16 +0000</pubDate>
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				<category><![CDATA[Aftermarket Supercharger Performance]]></category>
		<category><![CDATA[3VZ-FE]]></category>
		<category><![CDATA[Combustion Chamber]]></category>
		<category><![CDATA[Cylinder Head]]></category>
		<category><![CDATA[Head Porting]]></category>
		<category><![CDATA[Short Side Radius]]></category>
		<category><![CDATA[supercharger performance]]></category>
		<category><![CDATA[Valve Guide]]></category>

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		<description><![CDATA[Tweet I ran into this great article on DIY head porting on the Toyota 3VZ-fe (V6) engine. The article illustrates a step by step on porting the head complete with flow numbers and port moulds. In the article, the Toyota gains flow from 204CFM to 230CFM on the intake side and from 154 to 170 CFM on the exhaust side at 28&#8243;. Every 1.5 CFM on the intake flow is worth about 1 hp when all is said and done depending on the engine&#8217;s effeciency at using this airflow and so a gain of 26 intake CFM is worth an increase of around 17 horsepower as a rough estimate. This gain is doubly present on a supercharged car as follows: Take for example the original head flowing 204 CFM and producing roughly 136 horsepower. If we were to supercharge this engine using something like an eaton M62 supercharger and taking the engine to a maximum safe boost range for pump gas of around 15psi we would endup with a 272 horsepower combination&#8230; 272 horsepower for this head is 408 CFM at a pressure ratio of 2.0 (or 15psi of boost). When we port the head, the head flow increases by [...]


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