what will break valve springs?
I installed aset of Manley nex tec springs on a set of high flowing 867 heads. Ran the car for two days, ( it's a drag only car )
found we had some rubbing on the springs and surrounding area of the head ,( 1.645 diamiter springs on sbc head ) so when I removed the head and took off the springs / valves I discovered one inner spring had broken pretty much in half. The cam in the thing is total lift with rocker ratio of .726 and I checked for spring bind before I initially assembled the heads. no problems there. Just wondering if I just ran into a badly manufactured spring? Anybody?
Al