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This is basic stuff, but it never hurts to ask:
How did you break-in the cam, and what kind of oil did you use during break-in and since then?
Wth the current cam's .505"/.526" valve lift, do the springs have another .050" safety margin until coil bind, and is there similar retainer to seal clearance?
Are you running 1.5 or 1.6 rocker arms?
How did you break-in the cam, and what kind of oil did you use during break-in and since then?
Wth the current cam's .505"/.526" valve lift, do the springs have another .050" safety margin until coil bind, and is there similar retainer to seal clearance?
Are you running 1.5 or 1.6 rocker arms?