This kit can be installed to accept 0.50 valve travel at a recommended installed height of 1.300" which will product a seat pressure of 140# and an open pressure of 265# (intended for full race applications).
The difference between installed height and coil bind height is considered "free travel."
The coil bind height is determined by compressing the spring or springs with the retainer and base-washer in place. A vice can be used for this operation, once springs are compressed, measure the distance between the retainer and the base-washer where the outer spring contacts them.
Free-travel should always be gross valve lift+.060 for safe operation
Retainer-to-seal and retainer-to-guide clearance should also be gross valve lift +.060 for safe operation
Failure to check valve train clearances can result in serious damage to an engine.
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