Been battling this for 3 weeks. Oil pressue is 100% when cold and when it gets hotter it starts to do this.

Current mods below.
Already been through 2 oil pumps and a sensor. Dont know what else it can be

Have no noise anywhere and no issues 100% power just doesnt build pressure or if its the cluster...

 

Only way to know for sure is to stick a manual gauge on it.

 

^^^ put a manual gauge on it and verify oil pressure and see if it follows

 

I bet it's the cluster ! I took out some bearings and had a issue one time . It's moving to fast usually it's a slow sweep back and forth.

 

Thanks for the input guys! Trying to get ahold of one of those pressure gauges.

It developed a noise with the first oil pump after the top end rebuild and it was the oil pump gears grining into the cause. Well that causes long thin shards of metal to be pushed into my motor. Found them in the pickup tube screen upon removal.
Alot of people are saying it is most likely a spun bearing. But i have no noise or miss or anything.

 

Update!!

Got a mechanic gauge on it and pressure were little low.
At full temp idle in ger im seeing needled bounce from 18-20psi. At 2500 rpms im at 38psi and it barely hits 60 at about 4000rpms.

Any ideas?!

 

UPDATE PROBLEM SOLVED!!

Long *** road on this one guys.
The new pumps the GM Performance makea are a direct fit for any LS Motor except LS7 and LS9 for obvious reasons.
The new Gen 4 motors from 2010 and new require only 20psi oil pressure at idle and GM wants 6psi per 1,000 rpms.

So this means for us old gen 3 LS motors, our pump that puts out 40psi at idle is now superseded to the new pump, (why make the same pump with two different pressures). So now it runs at 20psi at idle and maxes out at 60psi at about 6100rpms. Talked to 3 different GM Performance techs and they all confirmed this.

Wish GM would release a TSB or anything, was about to put my boosted 6.0 motor build into a rush.