[Steve C.]

I will suggest there is more to choosing spring pressure that the horsepower involved and/or RPM involved.

"If we were to sum up the role that the valve spring plays in regard to its function as part of the overall valve train with one word, that word would be control. Considering that it is the predominant part responsible for keeping all of the valve train components in constant contact with the camshaft lobe, it’s easy to see how important getting the correct amount of spring pressure can be. Insufficient or excessive pressure will cause engine performance to suffer, along with the possibility of damage occurring, which can be severe. In conjunction with getting the correct pressure, there are other areas to address that will make sure you’re getting the best spring for the application."

https://www.enginebuildermag.com/201...ring-pressure/


"The valvetrain is one of the areas where properly matched parts are vital to ensure that the engine functions properly and the valvesprings are the key to this.

https://www.dragzine.com/tech-storie...ring-pressure/





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