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CMitchel17: Only way to check for spring fatigue is to remove them (don't believe one can do on-LT-head checks) and check the pressure. At the price they sell them, I'd rather just start fresh each time.
Ref. Ti valves: I've not heard of a compatibility concern with the seats. Wonder if lower RPM's and/or the softer spring pressures for the supercharged variant might be the benefit. We are considering the factory Ti valves to reduce weight and increase valve float rpm.
Oldman: Little confused with your 'not enough spring' comment toward the beehive? I'm using BTR's valve spring kit (BTR GEN V SPRING KIT WITH .625 LIFT / 1511/5071BH/BB). I'm hoping the same set will be compatible with a new cam (under .600 lift) and rev to 7000 rpm - seems like this would apply to your combination as well?
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