valve float?

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Apr 22, 2004 | 09:29 AM

jimmy 2 Times

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From: norristown PA

valve float?

okay, i have been reading posts, and the term valve float keeps coming up. what exactly is it? what causes it? and how do you know that you have it? thanks for the help

jimmy

Apr 22, 2004 | 09:13 PM

Wideopenc5

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Quote:

Originally Posted by jimmy 2 Times

okay, i have been reading posts, and the term valve float keeps coming up. what exactly is it? what causes it? and how do you know that you have it? thanks for the help

jimmy

Valve float accures when the lifter fails to follow the cam. In other words the lifter and the cam seperate at high RPM. There is not enough spring pressure to keep the lifter in constant contact with the cam at high rpm's. This is why most guys start using titanium valves and retainers in their heads because they are very lite weight. Thus less moving weight. You can also start using a higher pressure springs like dual springs.
Floating a valve sounds alot like bouncing off the rev limiter. But I promise you floating a valve is a lot harder on your valvetrain than hitting the rev limiter. You may be able to get away with it 10 times or just once. Your valves will be thrown out of time and could possibly hit your pistons.