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Old 01-18-2017, 11:27 PM   #4
TJ's Chevy
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Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
Re: Breaking Valve Springs

How much lift on the cam? Stock valve springs are only good for .450. After that you have to go a step up. Z/28's are good for .500 and tend to create a little to much open pressure. Those that have used them haven't complained of flat cams that I'm aware of.
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