Good to know. Maybe that's why they never pushed bushings on me when I told them my application. They would mention the upgraded bushings and leave it at that when I told them 6000RPM marine engines.

Interesting, bushings are de rigueur in diesels and common rail pumps.

Don`t mind my face ... but the green is knock . Red rpm.
I can see exactly when it went south lol

That`s not the right Data log above... that`s just normal run (only pulls timing after 60% knock) and back to idle, at idle the knock sensor is hearing everything .

This is the actual data log from the meltdown:

thats like looking at an ekg at the morgue! so if your very smart computer detected detonation and retarded timing why the hole in the piston?

.....

ICDEDPPL, So sorry to see your carnage here. That hurts to see.

Curious, what oil are you running in those monsters?

Not at all implying oil had anything to do with the failure, just curious.

I hope you have a trouble free 2022 season.

87Mirage: MR50 Driven oil.
Thank you thats what I`m hoping .

I don’t think any timing was being pulled at 4,000-4,500. Not sure however.

I think a lot of the problems we are seeing in hydraulic lifters is due to valve train stability. I've seen a lot of dyno runs where you can see where the valve train becomes unstable and that is on a stationary engine. I believe that a lot of our problems are due to oil control and oil aeration. I have learned so much about how critical oil control is especially in the marine environment since I rebuilt my motor. If I have to pull the motor I will replace the pan with something way more expensive than what I have. I bounce around pretty good on Lake Huron and my oil is everywhere but the bottom of the pan. I use a Master Lube pre-oiler, that I also use as an accumulator when I'm in rough water. But I know that's not enough to maintain constant non-aerated oil to my lifters. Just my 2 cents.