10/14/2026
There have been a lot of questions surrounding the design of our NEW .700” Dual Conical Valve Spring Kit, so we wanted to dive a little deeper into the engineering behind it!
Why a dual conical design? The conical geometry provides a progressive, non-linear spring rate and supports a higher natural frequency, helping maintain valvetrain stability at higher RPM.
What about spring interference? We designed these springs with what we call a minimal interference or “race fit” approach. The goal is to reduce friction, heat, and wear while still benefiting from the damping characteristics of a dual spring.
Why ovate wire? It’s all about maximizing performance within the available space. The ovate wire cross-section allows us to achieve more valve lift before reaching coil bind.
Beyond the physical design, these springs undergo an extensive proprietary superfinishing process, including specialized heat treatment, through-hardening, shot peening, polishing, and micropeening. Each step is engineered to optimize material strength, surface finish, and fatigue life.
There’s a lot more engineering that goes into a valve spring than meets the eye. Every aspect of our NEW .700” Dual Conical Spring Kit was developed with a purpose: improved valvetrain stability, reduced wear, and the ability to push your combination further! 💪
Link: https://frankensteined.net/products/fed-dual-conical-700-lift-valve-spring-kit
