Quote:
Originally Posted by 78w72
i'd be more concerned with push rod clearance of the heads using 1.65 rockers than cam break in. have you checked the heads for clearance.
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Quoted for truth.
I went nuts grinding clearance for 1.65 rockers on Father-In-Law's 455. It was WAY more extensive than what I was reading in books.
Quote:
Originally Posted by 78w72
curious to hear what the reason is to NOT break in a cam with 1.65 rockers?
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Higher ratio rockers increase the pressure on the lifter compared to lower-ratio rockers. If the valve springs are stiff enough, the higher ratio makes for excess pressure on the cam lobe/lifter interface.