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Thread: Ported DOOE 351w heads on a 331 - some new pics
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03-03-2005, 02:20 PM   #8 (permalink)
n2omike
 
Join Date: Apr 2001
Posts: 5,177
Ported DOOE 351w heads on a 331 - some new pics
The cylinder head has that big thing in the way... called a valve. Plus, the airflow path has to turn roughly 90 degrees before flowing out around the sides of that valve. [img]/phpBB/images/smiles/icon_smile.gif[/img]

80% of a cylinder's flow gains are generally found 1" above and 1" below the valve seat. [img]/phpBB/images/smiles/icon_wink.gif[/img]
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