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07-28-2009, 09:37 AM
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Junior Member
Join Date: Nov 2007
Posts: 27
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Valve spring life
I hear talk of superstock racers that have to change valve springs after 10 runs, is this for real? I know they run nearly an inch of lift, and almost 9000 rpms, but nascar runs 9000 for 500 miles. THOUGHTS.
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