Ok, I am trying to check for proper pushrod length on 454 with a hyd. Comp cam. I have purchased the adjustable pushrods from Comp and a pair of solid lifters. My problem is that the plungers on the solid lifters are .127" deeper in the lifter than the plunger in the hyd lifters. My guess is that my test will be in error due to this.

Is this assumption correct?
Do I have the wrong set of solid lifters for this check? The parts books indicate that I have the right lifter.
Could the difference be made up by the normal travel of the hyd lifter plunger?

Any advice on making this work would be greatly appreciated.
:confused:

Originally posted by 69SS4spd:
Ok, I am trying to check for proper pushrod length on 454 with a hyd. Comp cam. I have purchased the adjustable pushrods from Comp and a pair of solid lifters. My problem is that the plungers on the solid lifters are .127" deeper in the lifter than the plunger in the hyd lifters. My guess is that my test will be in error due to this.

Is this assumption correct?
Do I have the wrong set of solid lifters for this check? The parts books indicate that I have the right lifter.
Could the difference be made up by the normal travel of the hyd lifter plunger?

Any advice on making this work would be greatly appreciated.
:confused: =
Check the distance from the bottom of the lifter to the cup & see what the difference is.
Just stick the pushrod or an old bolt in the lifter & measure from the bottom (cam side)of the lifter to the top of the thing you stuck in the lifter & see how close they are.

Use the solid & when you get the correct length figured, subtract .100 & it should be right. The other .027 will be about the amount the hyd. lifter is preloaded @ a 1/4 turn.

Jim

Originally posted by 77 cruiser:
Use the solid & when you get the correct length figured, subtract .100 & it should be right. The other .027 will be about the amount the hyd. lifter is preloaded @ a 1/4 turn.

Jim =
True,,, but you still want to check the distance from the bottom of the lifter to the pushrod seat to be sure what you are measuring is not just a taller lifter housing to the top.
The reason is to be sure the pushrod seats are the same distance from the cam.
Not all lifters are the same in total length but most are pretty close from the bottom to the seat for obvious reasons.
Never assume nothin :D