[Steve C.]

You are in somewhat of a dilemma regarding checking valve springs. I've repeated it many times, do not trust the specifications listed in a catalog for spring pressures.

Here is one personal example from years ago with a set of Lunati valve springs. I bought a set of their #74500 springs that were rated at 200lbs seat pressure at 1.850" installed height at the time.
They ended up installed at about 1.920" with 219-220 pounds seat pressure. Isolated case? No, I called the source I bought them from and they pulled two sets of the same springs off their shelf and tested those. They were about 230 lbs at 1.900"

Now think of the pressure if installed at their rated 1.850" installed height !

I was given the name and contact for a spring engineer at Lunati from my source. When I called he was VERY surprised and then said the springs must of been mis-labeled !

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