![]() ![]() In fact, some racers even adjust the nut as close as 1/8 turn or less down from zero lash, which positions the hydraulic lifter plunger practically against the snap ring, effectively causing the hydraulic lifter to act like a mechanical lifter because it can't take up any clearance in the valvetrain. At high rpm, this delays hydraulic lifter pump-up because the plunger can't move far enough to interfere with valve closure when hydraulic force overcomes valvespring pressure. Turning the rocker arm adjustment nut a lesser amount after reaching the zero-lash point positions the hydraulic lifter's internal plunger closer to the lifter plunger's snap-ring retainer. When adjusting hydraulic flat-tappet or hydraulic-roller lifters for proper preload on a 350 small-block, a 454 big-block, and other displacements and engine makes with non-positive-stop stud-mounted rocker arms, stock specs typically call for a conservative one turn past the zero-lash point.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |