The ramps are faster on a solid. More aggressive

 

That will be interesting.
I like the gooder.

 

PLEEZE!! You have us all on the edge of our recliners...

 

I know.
I'm getting the shakes in anticipation.

 

Another update.
I just heard back from my tuner.
Now we have another issue.
Much lower oil pressure with the morel 5425 lifters.
Oil pressure was perfectly fine before.
Only now with the new solid setup.
Any suggestions or fixes?
Engine already has a high volume oil pump.

 

Idling at 25 psi instead of 40, but any kind of rpm at all it comes up over 40?

 

That sucks man. In the early days of LS solid rollers, several of the workshops were bushing the lifter bores when doing solid roller for their customers because the designs of the solid lifters being offered bled out too much oil pressure. If you do a time consuming search on here.. "solid roller" and "solid lifters" and go through them all you will find several old threads about it. I'm not sure if the lifters you have the actual design of the body is causing the issue or not because also i've also seen several engine builders mention that many morel lifters are a touch smaller diameter than stock lifters, which worsens the situation, and also that morel pin oiling lifters have very large orifice to oil the rollers which yet again worsens the situation. Now that wasn't in LS apps specifically from memory but sbc/bbc. Your lifters O.D might be fine, idk. Did your engine builder measure the O.D of the lifters with micrometer and compare to the previous lifters?

I'm not sure what I'd do in this situation. Does melling have a higher pressure pump than the one you have? If so that would have to be the easiest solution to try. Seen some people swear when losing too much pressure via the lifter galley in these LS's, it creates an uneven pressure to your bearings and results in a spun rod bearing. I've said it all on here before, lifters should be manufactured the same O.D as stock, and with the body as close as possible to stock.

I think you have yet again proven what I've been saying all along (and I've had people attack me on other forums for saying it) that some of these aftermarket solid roller lifters lose oil pressure and some blame only the pin oiling, but I don't think all the brands are all made equal. It would be very interesting if we were all rich guys here that could just drop $800usd like it's $80usd and several of us chipped in and bought a set of Crower hippos and gave them to you as an experiment to swap them over with the morels, and see what happens to the oil pressure at idle and every 1k rpm increment up to 7k rpm, with the engine oil at the same temp.

I know I post too much sometimes but it pisses me off that manufacturers offer these parts and we have to go on a journey to find out the hard way or do hours of internet research and make a decision. When you buy cylinder heads for these engines from a reputable brand, or pistons, or a camshaft, or intake, etc.. 99.9% of the time.. they all work flawless straight out of the box. A company selling solid roller lifters should be testing them in the real world and telling the customer if you fit them straight up you are going to lose 20psi oil pressure. I don't want to be the guinea pig to find out what effect that will have on my rod bearings after say 100 wot runs. It makes me want to stick to hydraulic and OEM gm lifters and be happy with 7500rpm shifts and gain elsewhere, because to damage an engine because of the lifters creating less pressure at the rod bearings is total bs in my opinion. Customers should be told what they are getting.

 

No. The 1 and 2 cam up while I was typing on my phone while on break. I don’t have enough time during it to correct

 

Darth, engine is idling at 20psi.
The PSI does increase with more revs but it still isn't right.
I don't know yet how high the oil pressure gets with more revs.
Tuner says lifters might be uncovering lifter galleys and losing pressure because they are so much shorter.
He also mentioned he might try using oil restricting pushrods but it's only speculation at this point.
I will have more information about the next step tomorrow after he does a thorough examination.
I hope the top end doesn't have to come apart again.
One thing after another dammit.

 

I did hear about these issues.
The lifters I got from Howards were manufactured in 2016 so they are fairly recent.
You pretty much said what my tuner said about the lifter galleys.
One thing after another.

 

Oil pressure is down 15PSI across the board for those that want to know.
Just received an update.

 

Oil restriction pushrods and shim the spring in oil pump maybe?
. I have a dart block and used the plugs to restrict oil to lifters.

good luck finding the issue, also use thicker oil

 

@Bort--I doubt oil restrictor pushrods would help. If the lifters are allowing it to bleed down, then pushrods will not help. Melling does make a high pressure pump. I run it.

@Launch - for the oil pressure thing. I have several reference points. Might be helpful.

* Stock 346, stock lifters, stock pump - 38-42 psi warm idle
* Cam only 346, stock lifters, stock pump - 38-42 psi warm idle
* HC 346, Johnson axle oiling hydraulic lifters, stock pump - 25-30 psi warm idle, but no difference between them and stock lifters over 1200 rpm.
* HC 346, solid motel drop ins, stock pump - 38-42 psi warm idle.
* LS7, HC, cam motion link bar solids, melting high press, std volume pump - 50 psi warm idle
* LS7, HC, Cam motion axle oil link bar solids, high press, std volume pump - I'll let you know later this month.

FWIW- here are the solids I will be running...

 

I say run the bitch. 10-20 idle and 50+ at rpm is fine.

 

The old rule was 10 psi per 1000 rpm. But by the time you get to 7k, no real diff between 60 and 70

 

Who knows what is the correct oil pressure.
Will see what happens tomorrow.

 

I just received an email from cam motion in regards to the lifter issue.
As some of you may or may not know,
The racing solid lifter cam motion sell is the Morel 5425.
I am told 20PSI oil pressure at idle is normal and to expect a drop in oil pressure because with axle oiling there is oil going into needle bearings.

Does this sound right?

 

Yup. It’s a leak path which will reduce overall pressure.

My 402 spinning 7200 rpm has lived for 20k hard miles with 10-20 idle and 50 psi at redline. Not sure why my pressure is relatively low, but it’s been just fine.

 

Very interesting spanks.
Would fitting a higher volume oil pump increase the pressure back to where it was?
I already have one installed but I'm sure there are higher flowing pumps out there too.

 

Yes. As I said earlier, I saw a pressure drop with the axle oiling on hydraulic set ups also. Once I hit cruising at 1200 rpm, it was up near 40. Once the pump gets some RPM it's fine. I truly do not think you will have an issue. As they tune it in, keep an eye on the pressure.

I think you are fine.