Tim, wouldn't there be a risk of hanging the valve open ? Curious how much preload is total in a lifter?
Comp says this about their website:
Setting Hydraulic Lifter Pre-Load
When installing a hydraulic cam, new hydraulic lifters or rocker arms, it is necessary to establish the
proper lifter pre-load. Insufficient pre-load will cause excessive valve train noise. Too much pre-load
will cause the engine to idle rough or have low manifold vacuum. It is critical to engine efficiency and
to the service life of the valve train for the lifters to have the proper amount of pre-load. On any
hydraulic camshaft, the ideal lifter pre-load is .030” plus or minus .010.”
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69 Gto, 390 posi gears,th400 w/jim hand converter/406 pontiac/#64 HEADS/ 10:1 compression/ 190 PSI with/ TRW 160 thou domes / hooker headers 1 7/8, PRW 1.5 rockers, 405 Crower Springs, Holley 750 vac with proform upgrade, Performer RPM on points / 284 H Single Pattern Crane
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