Anti-pump up lifter noise

[Jim V.]

I have been told recently that the crane anti-pump up hydraulic lifter that I am running in my 65 SB are the source of my noisey valve train. Anybody out there with any experience? Do different manufacturers offer a better, quieter anti-pump up, or maybe anti-pump ups are a waste for us under 6000rpm crowd.
Thanks
JimV

[Dale Pearman]

Simple Solution

Keep it wound up past 6,000 RPM. Summit LOVES ya!

Dale.

[Gerry Proctor]

Re: Anti-pump up lifter noise

They are largely a valueless component for under 6,000 rpm. Most folks have trouble properly setting anti-pumpup lifter lash since the adjustment operation becomes far more critical than the "ballpark" adjustment for standard hydraulic lifters. Some lifters do exhibit a bit of tick but it shouldn't be audible to the degree that is is noticeable or distracting. Variable duration lifters do make quite a bit of noise but, again, not anti-pumpups.

[Jim V.]

Re: Not So Simple Solution

That would be in my power range, wouldn't it? BTW.. we can't blame Summit... local machine shop recommendation.
JimV

[Jim V.]

Re: Anti-pump up lifter noise

Let me get this straight. Yep... anti-pump ups were a mistake but, if I do static lash setting (as compared to running zero lash + 3/4 turn) they should run quieter? It is hard to describe how noisey is noisey but they are annoying. I have been told to avoid the variable lifters as over kill and also (Rhodes, variable bleed...) due to there noise.
Thanks
JimV

[Dale Pearman]

Re: Not So Simple Solution

They're probably still laughing.

Dale.

[Dale Pearman]

Variable Duration Lifters

are the best thing in ages. They give better bottom end torque and change into a high end piece with RPM. They ARE NOISY however. If silence is your goal then replace the lifters with standard, stock units. This task isn't much of a job.

I LOVE the ticking of a solid lifter cam. The new Vipers use a variable duration lifter with their hydraulic high lift roller cam.

I've used Rhodes lifters on everything I've built over the past 15 years. David Rhodes altered a set of hydraulic roller lifters for me many years ago. Long before the idea was commercially available. They were perhaps the very first set in the industry.

Dale.

[Gerry Proctor]

[Jim V.]

Gerry....please tell me more

about lashing these puppies, I prefer NOT to pull em. They are Crane's 99277-16. My rockers are Comp Cams roller Tip 1412-16. May they also be part of the chatter? Anyhow thanks for the constructive advise.
JimV

[Clem Z.]

Re: Anti-pump up lifter noise

anti-pump lifters can be made from std hyd lifters by just zero lash them and that way they can not "pump up". and they are pretty quite.

[Gerry Proctor]

Re: An inherent danger in this is the..

Retaining clip, Clem. If the lifter plunger goes over the top, the clip of a standard hydraulic lifter will very likely pop. I've seen it myself so it's not "Car Craft" knowledge. Your qualifications as a subject matter expert aren't at all in question, given your repution. I just wanted to expand a bit more on this since some folks don't know all the differences. Anti-pump up lifters have a very solid plunger retainer that allows the lifter to run at zero or near zero lash. All that happens is that the plunger hits the retainer and goes no further. While there are clearance design differences in an anti-pump up that allow it to bleed-down oil faster than a standard hydraulic, you are substantially correct that you could run them with less lash and enjoy some of the benefits of the design-intended anti-pump up. But then you get back into the part where why do you need them if you're not spinning the engine very tight.

[Dale Pearman]

In The Case Of Variable Duration

lifters the drain hole is enlarged even more. They have way too much time at low RPM to tighten up.

Dale.

[Clem Z.]

Re: An inherent danger in this is the..

yes i have heard this,but do not you do the same thing to a greater extent when you back off the adjustment till it clicks and then retighten it down to what ever setting you use. most of the time i have done this was when i changed to #142 GM springs on small block engines just to pull more top end performance and speed out of the engine. any time you do any thing out side the norm you are in the danger zone.

[Gerry Proctor]

Re: Sure you do...

But I never did a valve adjustment with the engine running at 7,200rpm. ;-) It's fine to do this at idle since the oil pressure is lower and even a standard hydraulic lifter has enough time between cycles to bleed-down some pressure. The lifter only pumps up at elevated rpm.

[Clem Z.]

Re: Sure you do...

gerry i did not say you have to do it so if you are not comfortable doing this do not do it. all i said was i have done it on more than several engines and nothing fatal happen.