Quote:
Originally Posted by 6spdhyperblue
Is that or is it risk from the valve breaking off the stem?
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We haven't had any issues with factory LT1 valves breaking with a stable valvetrain. The factory intake valve is actually quite heavy, so it requires a little more spring and a little softer of a cam ramp to keep it under control. For more aggressive combinations that want to also improve durability, you have to go lighter on the valve side. This will allow you to run a more aggressive camshaft lobe as well as needing less spring to control everything.
Long story short, it is always beneficial to reduce reciprocating mass on the valve side of the equation. It will allow you to run a lot less spring + save every other component from excessive abuse wear