Lifter question

[ForcedFirebird]

Anybody have experience the Rhoads lifter idea?

[sanjay]

Doesn't that only work for flat tappet lifters??

Never mind, I was thinking of a small hole on the bottom of a flat tappet lifter to bleed off the oil...dunno where I saw that..

[Superdave]

looks like it's a similar idea to what i did with mine...

[ForcedFirebird]

Sanjay, I have flat tappets

Dave, It's a little more involved than what you did. Whereas you using a stiffer spring for the plunger made yours more like a solid roller in a way. The Rhoads lifter has a design that makes the spring softer at low RPM's, and as the RPM increases, it become more like a solid. This will alllow you to run an "oversized" cam and have less duration in the lower RPM's to make idle/low end better while retaining the qualities of a really big cam.

Form what I see is the oil orfice and spring they use allows a primative VVT.

Here's some good info...

http://www.rhoadslifters.com/Pages/FAQs.html

I also read a bunch of feedback on various forums, and from what I hear, they are extremely loud. This concerns me two-fold, one being the knock sensors, and two being the already noisy 660 valve train (it's going to be really clackety :P)

[Superdave]

Mine don't fully pump up at lower RPM's (below 1500 or so) via the stiffer check valve spring, then after that they stay rock solid via the stiffer plunger spring.

at idle i'm not getting full lift or duration since the lifter is absorbing some of it. Before these lifters i'd pull about 6-8" of vacuum at idle, currently it's at about 10" which dosen't sound like much but it really does make a difference.

[bszopi]

These have been discussed on here before, and I think there was even a member than installed them. A search might turn something up for you.

[ForcedFirebird]

These have been discussed on here before, and I think there was even a member than installed them. A search might turn something up for you.

Search yielded nothing, and even the feedback I did find through Google on the net, only old feedback etc came up.

After more research even, I have found the they are in fact a gimmick. They were popular a few years ago and the benefits don't outweigh the problems they seem to have, they never really fully pump up during high-RPM use.

Thanks for the responses guys

[Driver_10]

Meh... I got sollid rollers as is.

I personally dont see any setbacks other than having to adjust them ever so often.

[gectek]

umm still adjusting solid lifters? ok. anyway the rhodes also uses a bleed path that short circuits the regular path. they work like a champ in the pontiac engines of yore. im doing the hybrid lifters in my engine...thinking on going with a bigger cam too