Question on Comp 828-16 roller lifters

Usually I tube the lifter galleys on my small block builds and most have been solid lifter cam builds. We just finished up a .030 over 360 with a 625 lift Reed roller cam and Comp 828-16 lifters. Priming it tonight with an electric drill our max oil pressure is around 35 pounds instead of the usual 60 plus. Have any of you guys used these roller lifters on an unbushed or untuned block. It's the same oil we usually use and I always build them on the loose side for bearing clearance as it's race only. The oil pump was reused from a build that we ran before and had very low use on it so we flushed it out and installed it. I usually shy away from on high volume pumps as I had one stick and go over 130 pounds on a pass. If it's a standard pump and you guys ran these lifters successfully we may try a high volume pump before we panic

I have had to tube the block with 828-16s. I run a reed solid roller that is .650ish lift and it leaked like crazy past most of the lifters price to the tube.

If this is what they look like you have another
issue(like you forgot a plug).. I just put a set
in today.. I will be priming it tomorrow to see
what my priming pressure is.. I expect to see 70#
https://www.summitracing.com/parts/cca-828-16

All plugs installed including the often forgot one at the rear of the lifter valley drivers side. We slid a camera in the distributor hole and can see some leakage

The ones you have in there dont have any slots on the
body like the ones I showed... correct

Also.. I like to use the HV pump.. I can always shorten
the spring to drop the pressure but if the volume isnt
there to begin with then your screwed.. JMO but I only
run the HV pumps.. just put one today

Yes same lifter. May have found our issue and it's going to be a late night. Will update tomorrow

Hope you found the issue

Well we found issues but we are not good yet. VERY late night in the shop last night as we pulled the intake, drivers-side head, and oil pan. When Matt installed the oil pump it was hitting on one of the main cap studs so the oil pump wasn't bottomed out. remover the flat washer and that fixed that issue and we hoped that was our problem, but it wasn't. We primed it with the intake of and you could see the oil coming out the lifter bores into the valley. Lifted the head and tried Howards small block roller lifters and it was worse. Then we tried a set of new Bam 1008-16 roller lifters and they were worse than the 828-16 comps so we ended up putting those ones back in. We are up to a max of 45 pounds of oil pressure now but still way low. Way to much oil flowing up to the Harland sharp rockers so I picked up some 5/16 stainless set screws and drilled two of them out to .070-.072 and tapped another head I had sitting here to try it. Pictures below.

I also ordered a high volume Melling pump and picked it up today so hopefully by limiting the oil going up top and a few pounds of pressure from the high volume pump we may be OK. Matt is hoping to come over tomorrow night and my Duster is almost finished so we can hit it hard. I can't afford to bush all of our blocks but after seeing how much oil slides by these roller lifters I will NEVER build another one without tubing the block. Do yourself a favor and prime one with the intake off sometime to see what is going on. I was amazed.

I tell everyone to tube the block but they all tell me how hard it is, it doesn't work blah blah blah.

Once you get burned by it, you find its easier to just tube them all and be done with it.

I tubed my 408 and I ran a solid lifter cam in it till it's last rebuild when I finally installed a roller cam. It lasted 3 rebuilds and needing its forth when a rod finally exited the block. It ran 9.60's in my Duster and 10.10'in my Sons Duster. This build started out as a nice solid lifter build that would be sitting in a corner till needed but my son needed an engine so I made him a deal to good to turn down. This is also my last externally balanced engine.

I bushed my last block.. have a tube in
another one

my 360 with the tubed block, standard pump, comp 828-16s and full time(grooved cam) unrestricted Oiling had 60lbs on the drill if I remember correctly. When I pulled it it was hot idling at 20psi and going through the traps at 70 something with 10/40 oil.

I have let it feed the rockers full time due to it being a street engine.

There is a cup plug under the #5 cap that divides the pump feed and exit gallies. Could it have been removed? I have tubed every small block I have put rollers in, so I cant comment on lifter leakage.

He's using Brad Penn 15-40 on this one to start out on. Like I said above after seeing how much oil comes out the lifters I will never build another one without being tubed. I think the last one I tubed I used 1/2 inch house copper tubing but there's probably something better out there to use. I'm 15 minutes from starting my duster then I can jump back on his if all goes well

That's usually the first one I shove in after I clean a block just to make sure it isn't forgotten. Lol, but thanks

828 no tubes with 40psi idle 70 through traps and 100 cold at 2500

What is your lift spec?

I get the tubing from MSC in 6 foot sticks. I also bought the reamer from MSC and I make it so you can almost push the tube in by hand, once it's peened it can't move or come out.

Thanks. I will check that out. Do you happen to know the tubing size and part number for the reamer.

640/650 range and I use 10/30 race oil

Nice you must of had a block with some well placed oil galleys. That is the same lift I ran with the 828-16s and it would leak enough oil past to only run 20-30 psi on the drill.

I know guys that don't even pre-prime engines and many that do prime their engines don't install a gauge to check priming pressures.

I use a gauge but I didn't need to, when it didn't try to rip the drill out of my hands I knew something wasn't right.