Mini Valve Spring Tester 0-700lbs.

The PROFORM Mini Valve Spring Tester 0-700lbs is an essential precision instrument for engine builders, mechanics, and performance enthusiasts who demand accuracy when evaluating valve spring pressure and load characteristics. Whether you're assembling a race-ready cylinder head, diagnosing valve train issues, or validating aftermarket spring specifications, this compact analog tester eliminates guesswork and ensures your valvetrain operates within design parameters. Proper valve spring pressure is critical to prevent valve float at high RPM, maintain consistent timing, and protect against catastrophic engine failure.

This mini-format tester features a 0–700 pound pressure range with 10-pound scale increments, delivering reliable analog readouts without electronic calibration drift or battery dependency. The compact 5 x 2.6 x 10.7 inch footprint and lightweight 1.06 pound design make it portable enough for roadside diagnostics or shop bench work, yet sturdy enough to withstand repeated testing cycles. The straightforward mechanical operation allows you to measure both seated and open spring pressures directly, comparing actual values against manufacturer specifications or your custom performance targets with precision.

Ideal for flat-tappet and roller cam conversions, high-lift cam installations, and forced-induction builds where valve spring integrity cannot be compromised, this tester works across domestic and import engines. Techs validating OEM spring sets prior to installation, builders confirming dual-spring or spring-over-damper assemblies, and performance shops documenting baseline data will find consistent, repeatable results. The 700-pound maximum capacity covers nearly all street and mild race applications, while the 10-pound scale resolution eliminates ambiguity in critical pressure zones where even 20–30 pounds of variance can trigger valve float or contact issues.