WW
I'm going to do some stuff with the drain back. I've been sent some pictures of things I have to look at, which Goggles will no doubt post
We also run a vacupan setup which makes vacuum in the crankcase helping the oil fall back down. and we will look at a sump with more capacity, and a windage tray.
However the big end bearings all look good and only the main bearings at each end of the crank are damaged. The two in the middle look perfect.
I've got a chev 350 crate motor here that the the oil pickup had fallen off the pump. Without the pickup, the oil cavitates around the hole in the end of the pump.(this is normally where I go into my diatribe about oil pickups and fuel pickups on EFI pumps) So it shows oil pressure until you rev it. and then pumps nothing. The pistons in it look fine and have no scuffing and the bearings are blotchy with materiel that they have picked up.
The V6 has hammered the tripe out of the rear bearing which I would put down to the flywheel coming loose. and when you consider how much loctite we used and how tight we did it up is quite something. The front bearing I would have to put down to a harmonic in the crank caused by the flywheel . I will put it on some V blocks later and see if it's still straight.
Goggles did say he couldn't see on the last run, I thought that was just because his goggles had fogged up, but I can put that down to the crank as well.
Well MM, how's that for long sentences.
G