valve spring height question

Bakerlite said

So you think it's all about the base circle of the cam??? You have lots to learn my friend. There's more to the valve train than a spring and a base circle..
Here's a problem as well, you put those springs in your customers car and it wipes a lobe a week later. He takes it to another shop and they find the increased seat and open pressure, who do you think is going to be paying the bill to repair it ( whole engine strip and clean) as well as set the springs correctly??? Yeah, it's going to be you. Try arguing your "base circle don't much care" spring theory with the customer on that one..

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Yes, I do have lots more to learn. The more I do this stuff, the more questions I have and the more I find I don't know.
However, if you think 20lbs more on the seat/nose will wipe out a cam lobe, and that the numbers in the book or a spec'ed installed height is all that matters, I won't try to convince you otherwise.
As for any repair bills, a lot of the engines I do are the ones from other shops that failed for one reason or another. Keeps me pretty busy actually. And an extra 20 lbs of spring pressure has never been an issue, but the lack of that extra 20 lbs has. When you start to understand spring surge and valve train stability, you may re-think your installed height and spring theory.
If you would like to give us an in depth explanation of why that extra 20lbs will wipe a lobe, I'd be interested in discussing it.