Reply to "Bad valve spring day.."

garth66"When speed is the only thing that counts"

I feel for you... So sorry to see this. Looks like what happened to my fresh engine after only 980 miles or so. PAC Beehive spring broke and dropped the valve because the beehive springs have no damper to retain the valve if the spring or keeper fails. The RCA on my engine revealed some of the valve springs were out of spec, meaning they reached a coil bind situation with my cam even though my cam lift was well within the advertised capabilities of the springs.

Be sure your engine builder checks the compressed spring height of each spring. Your Beehive springs have advertised specs of:
Max Coil Bind: 1.210
Max Lift: .700
And your cam has 0.640” of gross lift. It would appear you have a sufficient safety margin, but everything's gotta be checked. I thought the same thing with my beehive springs and lift and trusted the advertised spec for the valve springs without measuring each one, so I ran into a coil bind situation with my engine.

Good luck, and keep us posted.

5/2/159:14 AM

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