350 Valve Springs
#1
350 Valve Springs
Can anyone tell me if this springs on an 84 chevy 4 bolt, 76cc heads are factory. Looks like spring with spring inside. Supposely the motor has a mild thumpr cam, seems just above stock. Also the top of these springs has 2 different tops? Any idea what and why this may be?
#4
They rotate the valve, not good for performance. You don't want extra weight on the valve side of the rocker stud in a performance engine. The spring height is shorter with the rotators. Are the rotators only on the exhaust valves?
#6
Yes, they are rotators for rotating the exhaust valve from overheating preventing hot spots and later in life, 'burning' the valve getting a hole.
As suggested, the inner spring is a dampener dampening spring harmonics reducing fatigue shortening the spring life.
As suggested, the inner spring is a dampener dampening spring harmonics reducing fatigue shortening the spring life.
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