In this , episode 20, DV explains how to not only check valve to piston clearance but also how and why reshaping them from a conventional shape can produce more power. Not mentioned in the video but pocket clearance measurements were preformed with solid tappet not hydraulic lifters.
IOP Porting software http://davidvizardperformanceseminars.com/ipo-porting-software.php
TorqueMaster software http://davidvizardperformanceseminars.com/torque-master-software.php
If you are savvy enough to read this description For a limited time you will receive a $25.00 refund on purchase of the full versions of above software's. To receive the refund you need to drop me an email with your invoice# after purchase @ davidvizardseminar@gmail.com
If you purchase the 90 day trial versions for $10.00 The same as above applies after purchase of full versions plus the $10.00 trial purchase price for a total of $35.00 refund.
Email davidvizardseminar@gmail.com
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