threw another #3 rod, how to prevent this from happening again. Options

[crash914]

So blew up my #3 rod. wondering what caused this. lack of oil, due to rpm? poor return? oil pump sucking air?

last time it was #2 rod. I really don't want to live with this again.

Motor specs,
Dual oil coolers with full flow plumbing
102 bore by 80mm stroke
long rods,
ham heads and valve train.
Running to 6800 rpm
g loads to 1.5
windage tray modified at pushrod tubes for oil flow
tuna can with 1/2 extra oil

Pics of horror below. First are this failure, then old failure.

[HAM Inc]

The CB pump is okay, but it has an internal cross over that can cavitate at high revs.

I used a Bugpack pump that came with 3 30mm gear sets and had the same cross over. I eliminated the cross over and one gear set. I did this by separating two gear sets with a hardened steel plate and shortening the shafts. This way the scavenged oil exited the engine through the cases original pressure circuit that originally lead to the stock oil filter.

With the external regulator I was able to dial in the pressure to a steady 50psi. That's not as much as most people run, but it's plenty of pressure. Observing the bypassed oil going back to the tank on the chassis dyno and comparing it to the scavenged oil returning to the tank I was able to estimate that ~ half of what was drawn from the tank was bypassed back, meaning that ~20mm of pressure side gear was plenty to generate a constant 50psi at 240* oil temps.

The modded Bugpack pump is on the left, the CB on the right. Once finished it fit behind the fan housing with only a slight bit of clearancing to a rib on the housing.

And yes, in case you're wondering, the old 10psi for every 1000rpm's is old school overkill. We ran 8300rpm's with 50psi for two years with zero issue. And on the dyno the difference between 60psi and 50psi was in the neighborhood of 5hp over 7Krpm's.

For a few years I circle tracked a 2.3 Ford mini-stock and ran over 8500rpms with 40psi and 275* oil temps. Never hurt a bearing though the oil temps did shorten valve spring life.