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02-28-2003, 01:27 AM
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#1 |
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Registered Member
Join Date: Feb 2003
Location: Seattle, Wa.
Posts: 175
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Valve lift is not so much the problem as is duration. If you stay with 230 degrees duration @ .050 lift (NOT ADVERTISED) or less then you can run as much lift as you want! It is not the lift that causes the problems, it is WHEN the valves are open! Big duration cams leave the valve open longer and that causes the interference problems. That is why the factory went to roller cams, you can get lots of lift and keep the duration short.
As far as the heads go. For the same money you will never get the airflow out of the 351W heads that you can get out of aftermarket aluminum heads. Plus it's 50 lbs off of the nose of the car. Plus aluminum is repairable. How many people do you know that can sucesfully weld cast iron?
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