Additional information
Outer Diameter: 1.540 in
Inner Diameter (Outer): 1.140 in
Damper: Yes
Inner Diameter (Inner): 0.754 in
Installed Height (Valve Closed): 1.900 in
Seat Pressure @ 1.900 in: 145 lbs
Open Pressure @ 1.250 in: 465 lbs
Spring Rate: 492 lb/in
Max Valve Lift: 0.650 in
Coil Bind Height: 1.130 in
Recommended components:
Retainers (PAC 300 Series): R387
Spring Seats: S110, S126
Application notes:
Big block hydraulic roller, marine, and solid flat tappet camshaft applications.
racingsprings.com
Vendor Part Number: PAC-1901
Pac Racing Catalog -24
Pac Racing Catalog -15
Always verify specifications with the manufacturer and engine builder before final assembly.
If the product is available at the Vantaa warehouse, it can be picked up or delivered—usually already within the same day.
When the product shows an estimated delivery time of 7–15 days, this is how the supplier‑warehouse order progresses.
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Check also: leveringsbetingelser