My thoughts after a little research are that during the compression braking the motor is making high manifold vacuum and is sucking oil past the rings which are a good bit looser than stock.

Driving to work this morning I used my normal brakes for the entire trip since that's what there for and no smoke whatsoever. Even got a little silly and the only smoke was from the tires.

 

Nice!!

 

Oh yeah dropping gears to slow makes it go into high vacuum, used to notice that big time when I had a boosted car. But it didn't have opened up rings. Makes total sense that could have also been a factor. High rpm against a closed throttle blade = lots of suck lol

Really glad to see it's up and doing well man

 

Thanks that seems to be the common thought across the Google lands. Gonna try to gets some logs tonight and send them to Atomic so I know its good to go. I think we were working on the very final revision before the electrical problem/clutch slave/head gasket

 

Yep, never ends and always seems to be that'a way lol.

 

All good now though time to enjoy the empty streets

 

Pretty sure oil isn't the only thing in the muffler now......


The smoking's never gone away and all though it passed the leak down test obviously something wasn't right. I was planning to pull it apart again and investigate further. However I Went for a little ride to relax and on the way home I punched it in third AFR was steady in the low 12s, boost was between 7-8 and oil pressure was close to 70psi. Shifted to 4th at about 5900rpm and into 4th I kept my foot down. About 1,000 rpm into 4th gear somewhere around 4,500-5,000rpm motor felt as if it shut off. Looked down and saw it struggling to idle at 100-300rpm. Oil pressure was about 5psi. I shut it off and pulled over. Quick visual inspection and everything looked good. No rods hanging out no oil dripping. Checked the dipstick and it was still full and didn't sparkle or smell terrible. Tried to start it and it sounds like Optimus Prime fighting Decipticons. Luckily I was just a mile from the house and got towed home quickly. A better visual inspection noticed these sparkles in the tail pipe. Pretty sure its bits of metal.

So:
A) Piston exploaded?
B) Valve dropped?
C) COVID-19?
D) All of the above
E) Start it and try to do a burnout?

 

knowing you, it likely started with E... as a result of all the pent-up energy caused by C.
so i'm leaning to initially guess either A, B, or D without looking at any other evidence or applying any analytical sense to the situation.

 

but since it sounds like your truck is having a hard time breathing now, it very well could be another COVID death... just like some recent fall & gunshot victims

 

No matter what it will get ruled as C. Why did you stay in it with your AFR in the 12’s? Not saying that was the cause but 12’s is leaner then desirable. Did it knock. Would you have heard if it did or was the radio cranked?