10/10/2026
Engine building is more than just bolting parts together. It's all about measurements, mathematics, and precision.
In this case, a Star Racing .680" camshaft gets paired with Jims USA rocker arms featuring a 1.745:1 ratio.
The original .680" valve lift increases to an impressive .730" (18.55 mm)
More lift means more things to check! Valve spring coil bind clearance, piston-to-valve clearance, and all other critical measurements must be verified before final assembly.
Measure twice, assemble once!