DR Beehive Valve Spring Specifications:
Free Length: 2.100"
Application: Vortec heads 096/062 casting, GEN1 SBC with 1.250 spring pockets.
Coil Type: Ovate
Coils per spring: 7
Installed Height @ 1.800" 90lbs
Open Load @ .500" 283lbs
Max Lift .530"
Max rpm 7000* (with hydraulic roller) Dyno Proven. *Higher RPM available upon request.
Drop In Package: (16) Load matched color coated valve springs (8) intakes (8) exhausts, (16) matched CCA 787-16 hardened steel retainers, (16) MAHLE or FELPRO Valve Stem Seals, (32) Hardened valve locks for vortec single groove valves, hardened spring shims (If required), and instructions . Package drops in Vortecs (062/906 catings) and works on GEN 1 SBC applications (w/1.250" spring pockets). LS applications or ordering outside USA please inquire before ordering. Price: $341.99 (Includes Shipping) to lower 48 states.
BEEHIVE SPRING MATERIAL, DESIGN, AND FACTS:
Valve springs are manufactured with super clean chrome silicon (SCCS) in Kobe, Japan (only SCCS alloy source in the world). SCCS eliminates micro inclusions and voids found in cheaper inferior tool steel spring material (used in many aftermarket valve springs). Springs are coiled to my design prints, squared at the top and bottom. This provides accurate location in cylinder head valve spring spring pockets as well as precise retainer fit at the top of the valve spring. Once the springs are machined, they are media blasted and clear coated to prevent the "super clean" raw material from oxidizing. Post manufacturing and springs are shipped to me for load testing and matching +/- 2% using my custom valve spring load fixtue with Ashcroft calibrated gauge. Springs use thinner ovate coils with taller height providing coilbind clearance (@ .530"). Different diameter spring coils eliminating thinner dampner requirement. This provides valvetrain control with lower installed and peak loads. Load sheet provided with purcahse. Drop-in dyno proven to 7000+ (Stock heads peaked at 5800).
See Jim's page for results with DR drop-in beehive spring package and using .500" lift solid falt tappet. 425HP.