Vortec L31 cylinder head

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 Unported Vortec’s with the "tricks" can produce 500 HP on well built, high CR, drag race short block. 425-450 HP is more realistic for a killer street engine running on pump gas.</blockquote>
+==Flow rate of L31 Vortec Heads==
+{| style="color:black; background-color:#ffffcc;" cellpadding="5" cellspacing="0" border="1"
+!Lift (inches) !!Intake (CFM) !!Exhaust (CFM)
+|-
+| align="right" |.1 || align="right" |70 || align="right" |49
+|-
+| align="right" |.2 || align="right" |139 || align="right" |105
+|-
+| align="right" |.3 || align="right" |190 || align="right" |137
+|-
+| align="right" |.4 || align="right" |227 || align="right" |151
+|-
+| align="right" |.5 || align="right" |239 || align="right" |160
+|-
+| align="right" |.6 || align="right" |229 || align="right" |162
+|-
+|}
+;'''Sources:'''
+:Paul Shufelt
+:Chevy High Performance (Feb. 2001)
 ==Valve springs==

Revision as of 00:48, 19 April 2012