Thread: Why did nhra change the cam and valve spring rule in 1985?
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Old 07-05-2010, 06:13 PM   #1
Rick Leininger Jr.
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Default Re: Why did nhra change the cam and valve spring rule in 1985?
Quote:
Originally Posted by Billy Nees View Post
No matter where you increase the opening and closing rates on the cam the valve MUST follow the ramp and the rate of opening or closing.
IF you use the ceramic lifters.
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