Thread: Oil pressure drop after top end rebuild

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Jeez! I thought that some of you knowledgeable people would have had something to say!
My conclusion at the moment is that the direct oiling of the rollers on the lifters is causing more oil to flow and hence the pressure drop and/or that the shaft rocker system is flowing more oil and causing the drop. I do not think that fitting std type restrictors will be good even though it will raise the oil pressure before them in the system it will lower pressure after them hence reducing oiling to lifter rollers which are known to suffer on street engines. Next maybe I should consider restrictive pushrods?

Originally Posted by webby

Jeez! I thought that some of you knowledgeable people would have had something to say!
My conclusion at the moment is that the direct oiling of the rollers on the lifters is causing more oil to flow and hence the pressure drop and/or that the shaft rocker system is flowing more oil and causing the drop. I do not think that fitting std type restrictors will be good even though it will raise the oil pressure before them in the system it will lower pressure after them hence reducing oiling to lifter rollers which are known to suffer on street engines. Next maybe I should consider restrictive pushrods?

well did you nick the cam bearings ? did you mic the cam journals for size . your direct lube lifters will lower the oil psi abit . why would you restrict the push rod .all you going to do is dry up the top end were valve springs will not last long if your driving this on the street and you think your getting all the top end oil you need you can use restrictors in the back of the block just step up on the restrictor hole size till you get were you want