PAC Racing - Severe Duty Solid Roller Triple Valve Springs - (1247)
The PAC Racing 1247 is a severe duty, drag racing valve spring designed for very high lift, solid roller style valvetrain. Direct replacement for most aftermarket big block cylinder heads with 1.645 diameter springs. Very good valve spring for high RPM drag racing applications. Round wire construction.
DIMENSIONS:
1.645” Outside Diameter
1.195" Inside Diameter
0.871" Inside Diameter
0.635" Inside Diameter
No Damper
SPECS:
290# at 2.070”
835# at 1.270”
682#/inch rate
.800” Max Lift
Coil Bind: 1.130"
183 grams
PART NUMBER: PAC-1247-16
