AV&V™ High Performance Valve Spring Kits (3/8 valves)
High Performance Valve Spring kits – Double
- Manufactured from ultra clean high silicon & vanadium alloy wire.
- CNC machined tight fit locks.
- Light weight 1.375” chromoly top retainers; for better clearance inside rocker covers.
| Part Number Kit | Part Number | Max. Recommended Lift | Seat Pressure | Open Pressure (lbs@mm) | Coil Bing Height | O.D. | I.D. | TYPE | Retainer | Lower Collar | Valves Locks |
|---|---|---|---|---|---|---|---|---|---|---|---|
| VSK470 | S470-4 | .470" | 155lbs @ 1.375" | 300 lbs @ .980" | .850" | 1.640" | 1.010" | Double springs | R530 (4) | LSC530 (4) | VL375 (8) |
| VSK530 | S530-4 | .530" | 155lbs @ 1.455" | 320 lbs @ .980" | .980" | 1.640" | 0.970" | Double springs | R530 (4) | LSC530 (4) | VL375 (8) |
| VSK590 | S590-4 | .625" | 175lbs @ 1.455" | 350 lbs @ .980" | .850" | 1.625" | 0.965" | Double springs | R530 (4) | LSC530 (4) | VL375 (8) |
NOTE
These Pan/Shovel valve springs are not bolt-in items. Always make sure to check the minimum spring spacing and to keep a minimum of .060” before coil bind, at full lift.
Early 1948-1980 heads must be machined to accept AV&V’s late style lower collars.
You may need to machine the spring seat with Goodson spring seat cutter #VSS-1680HD and/or use AV&V upper spring collar kit #R530-4 and/or machine the valve seats deeper to get the correct spring spacing.
For reference, on late style Shovel (1980-1984), with a 1.630” valve stem protrusion, the spring spacing is +/- 1.375”.
Retainers
| Part number | Alloy | Traitement | Angle | Part Number Kit |
|---|---|---|---|---|
| R530-4 | 4140 Chromoly steel | Black Oxyde | 15° | VSK470 - VSK530 - VSK590 |
Lower Collars
| Part number | Thickness | O.D. | I.D. | Alloy | Part Number kit |
|---|---|---|---|---|---|
| LSC530-4 | .055" / .180" | 1.495" | .755" | Heat treat steel | VSK470 - VSK530 - VSK590 |
Valve Locks
| Part number | Stem | Groove | Usage | Tapper | Part Number Kit |
|---|---|---|---|---|---|
| VL375-8 | 3/8" | Single | Double spring | Jumbo 15° | VSK470 - VSK530 - VSK590 |
NOTE
OE replacement