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Old 06-02-2008, 04:41 AM
Ant Ant is offline
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Join Date: May 2002
Location: Ashburton, New Zealand, ..
Cobra Make, Engine: UK Ram SC. KC-Yates 373, Jerico 5 speed.
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Default Flat tappet valve spring life

I am curious as to how often it is necessary to change valve springs to try and avoid catastrophic failures? With sprint race events of 7000rpm over 15mile races x3 per event and some much easier road miles. So not sustained high rpms!!

My camshaft is flat tappet with 180Ibs seated pressure!
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