 Gripes about Comp Valve Spring Height Micrometer
My Comp 4930 Beehive Valve Spring Height Micrometer does not directly read installed spring height. It is calibrated to read the micrometer’s overall height rather than the recessed face where the retainer rests. To determine the correct spring height you need to subtract the depth of the recessed area. It is difficult to accurately measure that depth (approximately 0.140 inch). I also have a set of Comp 772 Titanium retainers (for beehive springs) that do not fit the bore of the micrometer. The neck of the retainers is 0.640 inch, while the micrometer bore is 0.635 inch. Stock GM retainers do fit.
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2002 M6 Z28 1SC "Stripper" 3140 lbs empty
346, LS6 Heads, Comp 212/218 .558/.563 115 Cam, 918 Springs, FAST90/Holley90, QTP Longtubes,
Raptor shift light, Moser 12-bolt 4.33 Truetrac, Spec 4, PST 3.5-in Al Driveshaft, 26x10.5-15 ET Streets,
HPTuners, LM-1, 11.735 Sec @ 116.8 MPH with 1.591 Sixty | 
