Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

A little more flow ?
Posted by: roverman
Date: August 01, 2012 01:01PM

For all those running a low intake valve lift, you "might" want to consider a 30 degree seating angle. According to David Vizard, this makes a 2.05" dia. valve flow like a 2.46" dia. valve/45 deg. seat. This usually requires a tighter guide clearance, and possibly a "conformation groove", on top of intake valve,(also reduces reversion). Onward, roverman.


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