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cam break in valve spring pressure

1513 Views 1 Reply 2 Participants Last post by  Dave427
I have been doing some searches on here and can't seem to find a good rule of thumb for exactly how much spring pressure should be used for cam break in. I am guessing 2/3 or 3/4 of normal recommended spring pressure? I just removed my innner springs, but a friend is breaking in a cam and will be using single springs. I have some lighter springs he could use for break in, but how light do they need to be?
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