Exactly the point...your builds are mild and you still had a failure.....maybe actually consider the advice given to you on here instead of going against it and doing whatever you want....I feel like we've been down this road before....:party-smiley-004:

I DID take advice from this site. Some members don't agree. Im sure there a lot of guys running "comp" products without any problems.

Hey PQ290 what all needs to be replaced to convert to a roller cam? I have a flat tappet but everything needs to be replaced so it seems like the right time to convert. Is there a retrofit lifter set you used?

So your running solids? Just curious how many hours btwn setting the lash. In reality I assume solids vs hyd should be the same timeframe if everyone goes by their 0, 1/4 turn, 1/2 lash etc etc.

same wearing parts although hyd yes may be a little more forgiving before noticing a failures.

On the same note I picked up about 20 hp + just tightening the lash on the intakes. Went from .020 to .012. I’m just not sure why more people just don’t run solids unless running the best of the best hyd. If I were to go back to hyd I’d go the isky route for sure. Just not sure how they’d hold up with my cam dur/lift. Rookie and many others have had great luck with those especially with routine rebuild. With net surfing my next would be Johnson’s but have no experience with.

no running hyd right now but coming up on time to build some new power.

That is why I ask how many hours before you have had to adjust.

Why don’t the GM lifters get any respect ? They do in the small block and ls world. They’ve seemed to do fine in a bunch of bbc street and marine builds too, just not much talk/recommendations of them.

they do but you need a gen 6 block so that makes it tough for some. the GM lifters work great and hold up great up to their lift limit so if someone could figure a good way to retrofit them to an older block they would make some money.

This thread is so long i may have forgot where it started. :)

I have the stock roller lifters in a 1987 350 I made a 383 out of. Lingenfelter high lift cam and stupid spring pressures. Been running fine for 20+ years and still going. I remember back when I was building that eng, everyone said the factory roller lifters are good enough. Seems to be true.

Does anyone set hyd valve lash with eng running any more? I've had nothing but good luck doing that way. Can be a bit messy but it's almost fool-proof.

Ah, that brings back burning oil on manifolds/headers memories!

I always run the stock GM dogbone lifters when I can. I have ran them to .635 lift and about 450# spring pressure without a failure. If you don't have a gen 6 block or need more lift or spring you are SOL.

I think the Comp lifter is very susceptible to dirt in the oil gallery. I’ve been doing a lot of reading on this and have come across others that have found grit to be the issue. Is this coming from assembly issues of the lifter itself, or insufficient cleaning practices? Maybe this is why other makes are failing.

The blown 454 that I had ran into a similar issue with a Comp 854 lifter. This was years ago but the failure was the same. These lifters had been used in another engine for a good many hours without any issues. I had two fail within an hour of being run on the dyno. Looking back on in, the only thing I can think of is that there was contamination - from my recently machined 454 block.

Since you probably won’t get anywhere with Comp, I think it would be a worthwhile to open up the bad one to see what caused the plunger to stick.

You could always contact Billy and see if theres anything he can do for you ...
I bet if you send him the part back he`ll send you a new set ..





.From: Billy Godbold [[email][email protected]]
Sent: Tuesday, November 09, 2021 7:58 AM
To: Daniel Baloun @ AccuMax Inc.
Cc: Walter Britton; Chris Potter
Subject: RE: new lifters



Hi Daniel,



We have a better lower design on the new lifter (stronger ears with a longer skirt), but I know Chris would love to see yours. Can you email Walley and see if we can get those back for inspection. You would not believe how valuable damaged parts are for us as we work to continually improve our designs and manufacturing methods.



Thank you,

Billy



Billy Godbold



COMP Cams Valvetrain Engineering Manager

Edelbrock Group




Hi Dan,



The COMP Cams, 3406 Address below is best. Sending them “ATTN: Walter Britton” would keep me from losing them…



Billy Godbold
3406 Democrat Road

Memphis, TN 38118

Direct: 901-375-3412

[email protected]

Good point TomZ. A lot of the BBC blocks having bad lifter bore to cam tunnel alignment would be 'lobe eaters'.

Getting a good clean on the oil galleries is hard to do if not setup for it, or don't have good assembly practice...or just have Mr. Murphy come for a visit.
​
Seems that opening up the Comp lifters and inspect/de-burr and tolerance check would go a long way to avoid the stuck plunger...should someone 'have to run the Comps'.

It certainly makes a good case for solid lifters, if you have the easy space to both pull the rocker covers and bar over the engine for the lash adj.

Also making the case for mild cams and blowers...

LOL. Having a home-made set of valve covers with the holes drilled above the rocker adj's helps considerably. Otherwise, gotta keep the idle rpms as low as possible. Having a cold one handy is always a good idea in case there's a flare up.:evilb:

A couple of cold ones… because you can never be too careful!

It's been a year since you had this issue. Did the replacement parts fix the problem?
I think I may have the same issue.

Yes. Everything worked out fine.

GOod to hear! Can you describe what the noise sounded like? Mine isnt' a perfect higher pitched "tick" noise. It's a little bit odd. Also - I can't differentiate which side it's coming from so this makes me think it's lower in the valvetrain. I had 4 guys here one day listening to this thing trying to determine what it was.

The lifter got jambed so there was about 1/4" gap with the rocker at the valve tip so mine was pretty loud and I picked it out as "a problem " at #5. I didn't know what the actual problem was until i pulled the valve cover. All the poly locks were adjusted the same so I pulled the intake and found the bad lifter.

morels blow donkey balls.

i thought everyone was moving over to Johnson lifters. We did never looked back.