Valve Spring: Specifications

Valve Spring Compression Pressure (lbs) at Specific Height
Intake (allowable limit 10% loss pressure) 74-82 (lbs) at 1.78 inch
Intake (allowable limit 10% loss pressure) 190-210 (lbs) at 1.20 inch
Exhaust 76-84 (lbs) at 1.60 inch
Exhaust 190-210 (lbs) at 1.20 inch
Valve Spring Free Length (Approximate)
Intake 2.04 inch
Exhaust 1.85 inch
Valve Spring Assembled Height
Intake 1-49/64 - 1-51/64 inch
Exhaust 1-37/64 - 1-39/64 inch
Valve Spring Out of Square (Maximum) 5/64 (0.078) inch