If you’d like a professional opinion on your valvesprings, check out our valvetrain engineering services page.
The calculator above is not a substitute for proper engineering analysis – it is for estimation purposes only and is not valid for profiles asymmetrical in the negative acceleration region, or for “cheater cams” having a near dwell at max lift. It also does not consider pressure differential across the valves (turbo / supercharged applications). The calculation assumes that valvetrain separation (lofting) is not desired.
