Valve Spring

Valve spring Compression pressure 711.47 N @ 26.19 mm (159.9 ft. lbs. @ 1.4228 inch)
Valve spring installed presure 289.1 N @ 36.14 mm (64.99 ft. lbs. @ 1.4228 inch)
Valve spring installed pressure - service limit 10 % pressure loss @ 28.02 mm (1.103 inch)