[leeklm]

So I have read about every article on the PY forum (among others) regarding roller lifters. Many of these articles scare the crap out of me (especially from the BBC forums), but putting another flat tappet cam in my engine scares me even more.

I am going with a modified version of SD's Stump Puller roller, and am ready to order lifters. Dave's first suggestion was the CC 857S hyd. Says they have used many of these for the past year with no issues. They have also had good luck with the CC mechanical with pin oiling. As Dave reminded me, you always hear about the worst case scenarios on the internet!

I am certainly not questioning Dave's knowledge or experience here, but am curious to hear opinions from all or your real-life experience as well. From my research, I have narrowed it down to one of the three following options...

--Comp 857S Hyd
--Comp 859 mech
--Crower 66260H mech (leaning towards this option)

Similar to many cars here, mine is mostly street, maybe 2K-3K miles per year weekend warrior, and a few trips to the drag strip just for fun.

Not looking to get into a whole lifter debate here (we have plenty ), but feel free to place your vote for one of the options above!

Thanks!

[grandville455]

#3!!

[HWYSTR455]

I say option #1, since it's a hyd roller to begin with. Personal opinion is if you want mech, then start with a mech grind, and visa-versa. Only do the hybrid if you suffer issues, or have a specific reason for doing so.

It's true too you hear about the horror stories, and not particularly the success stories. Or the horror stands out more!

Also, some create their own problems that you don't hear about. Amazing what some think a 'clean assembly' is.

If you go hyd roller, maybe ask SD to clean and inspect them instead of just shipping them. You will pay shop labor, but you will feel more comfortable about using them. If there's anything wrong with them, they should find it too, or better have two sets of eyes on them.

.

[grivera]

This is an interesting topic. What valves are you using? I ask because I was under the impression some valves, like the Ferrea 5000 series, are limited in the spring pressure they can sustain. I'm not sure what the limit is but this should be a consideration if you choose a solid roller lifter that will require a stiffer spring to keep it planted on the lobe. Perhaps the more experienced members can comment?

[David Jones]

I have number 3.
I took out Comp hyd roller lifters because of noise.
My cam is a Comp Hyd roller and at this point I don't see a down side to this combo other than periodic maintence. Which I find enjoyable.

[leeklm]

Originally Posted by grivera

This is an interesting topic. What valves are you using? I ask because I was under the impression some valves, like the Ferrea 5000 series, are limited in the spring pressure they can sustain. I'm not sure what the limit is but this should be a consideration if you choose a solid roller lifter that will require a stiffer spring to keep it planted on the lobe. Perhaps the more experienced members can comment?

I never did ask Dave what valves he planned on installing into the heads. He seemed comfortable with either the hyd or solid lifter with this combo, so I did not question it.

[jonmachota78]

If you decide on solids, and If you can afford it, i would look into some isky ezrolls for the street.

So far my comp hyd rollers are awesome. Had a couple speed bumps getting there but they were superb all last summer, no complaints!

If/when they take a sh@, ill be sourcing me some sollid roller bushings.

[grandville455]

The 295 heads come with the 5000 series valves. If u want the 6000 u better let Dave know.

[Richie Hoffman]

I have used comp hyd rollers some made noise others didn't. used a bunch of morels from bullet cams no problems so far

[wheelspin]

Both my GTO and TA are equipped with Dave's 305 cfm KRE's and both produce 550-570 crankshaft horsepower with almost 600 ft. lbs of torque. The GTO has the SD O/Faithful grind HYD roller cam and the TA has a large SOLID roller cam (bigger than Dave's Road Paver) and BOTH engines use Crower HIPPO (pressure oiling on axle) SOLID roller lifters. If I had the extra cash at the time I would have selected Isky EZ Rolls since both cars see a lot of street duty, including occasional prolonged idling at lower oil pressures (35-40psi at idle using 10-40 Mobil 1).

[grandville455]

Originally Posted by wheelspin

Both my GTO and TA are equipped with Dave's 305 cfm KRE's and both produce 550-570 crankshaft horsepower with almost 600 ft. lbs of torque. The GTO has the SD O/Faithful grind HYD roller cam and the TA has a large SOLID roller cam (bigger than Dave's Road Paver) and BOTH engines use Crower HIPPO (pressure oiling on axle) SOLID roller lifters. If I had the extra cash at the time I would have selected Isky EZ Rolls since both cars see a lot of street duty, including occasional prolonged idling at lower oil pressures (35-40psi at idle using 10-40 Mobil 1).

Les
Do both those heads have the 6000 series valves? what springs u running on both?

[wheelspin]

Darby,
5000 Series in the GTO and 6000 in the TA. Both heads use the popular Crane 988393 (?) Chevy BB springs, as recommended by Dave. I suffered catastrophic engine failure in the TA following the lose of both valve heads in one cylinder which then migrated through the motor cracking three cylinder walls, holing one piston, cracking one of my 260 cfm 6X-8 heads, flattening the new cam, and cracking the lifter bores . This was using Comp hyd. roller lifters with the OF grind, 5000 series Ferrea valves, stiff Smith Bros. .116 wall Chromoly pushrods and steel retainers. Current build: SD 305cfm KREs w/ 6000 series valves & Ti retainers. Kinda a chicken or the egg failure based on the engine's autopsy. I was only able to save the crank, rods, and the lifters .

If you need more details PM me for a phone #

[leeklm]

Hey Darby,

I touched base with Dave, who said that the 5000 series valves will be plenty good for what I am doing with the stump puller cam.

[grandville455]

Originally Posted by leeklm

Hey Darby,

I touched base with Dave, who said that the 5000 series valves will be plenty good for what I am doing with the stump puller cam.

Yes they will be as long as u don't want bigger later ,lol...

[leeklm]

Originally Posted by grandville455

Yes they will be as long as u don't want bigger later ,lol...

Who, me?

As I was telling Dave, I have too much time & money in my car keeping it mostly "correct" to go any further down this path! Problem is that our winters are too damn long, so we have 6 months worth of project work each year! If I were in TX, I would do less work on the car so I could drive it more!

Maybe I need to purchase a basket case restoration project? That would keep me occupied for at least 5 or more winters!

[68GoatMan]

I'm waiting on my Luhn Hydraulic Roller Lifters. Hard to argue with a lifetime warranty. IMHO the 857's are junk. Been there done that, got the bills to show.

[GoatDr]

How about the short travel hydraulics that Butler sells? You can go higher spring pressures and increase RPM's over standard hydraulic rollers.

[68GoatMan]

I believe those are from the same manufacturer (Johnson) as Mark Luhn is selling. Also Scorpion. I'll get mine on wed, so hopefully I'll have some feedback ready by the end of the week. BTW, the ones I

[68GoatMan]

Have coming are short travels.

[leeklm]

I do see that Scorpion and others sell them, and made in USA for an extra bonus. Anyone else here using these?