Balrok

iTrader: (15)

Not many. Did the breakin on the dyno, all the normal **** procedures. 1500 maybe. ~7 weekends. DOM 15w50 like clockwork. The issue started with PCV fitting from the VC at the beginning of the weekend to this Sunday sprint. Was down 1.75 quarts at one point.

LetsGetThisDone

iTrader: (1)

Yeah. I see those logs. Looks like you were likely draining the pan and hurt the motor.

heel2toe

iTrader: (41)

The writing was on the wall. 2 takes...you already had an oil pressure issue and it got progressively worse to the point that you popped out your PCV from the additional CC pressure. Or PCV popped out, freak incident, heat vibrations and your oil level dropped then ran it dry and bearings took a beating. This was the grommet right? Bc that thing is in there pretty freakin tight!

Didn't you say you snapped off your oil pressure sending unit too? Was she spitting out oil when that happened(assume so) I can't remember your chain of events and it totally sucks man. Just would be good to know why oil pressure started dropping.

LetsGetThisDone

iTrader: (1)

Things that cause low oil pressure don't cause crank case pressure.

IIRC the PVC popped out because he was trying to jerry rig a plug there because having a breather line in that port let's a lot of oil into the catch can. So when the plug popped out, it was obviously puking oil out. Oil got low, and he was draining the pan with sustained high rpm's on straightaways.

heel2toe

iTrader: (41)

What Im saying is if CC pressure all of a sudden is higher something changed for the worse. Yeah I can't remember his exact sequence of events but if she was puking oil, then the obvious culprit was a low oil level, starved the pump and the rest is history.

Question-do the pumps fail and then take out the bearings or is it simply lack of pressure which kills the bearings?

Ayoustin

iTrader: (2)

Low pressure will wipe rod bearings and also cause the oil pump gears to eat into the case. That causes the pump to leak internally so the output pressure is lower once it starts to open up. They're both issues that feed into each other.

Balrok

iTrader: (15)

Yes in march it kept blowing out of the catch can filter in the morning, bypassed and plugged but RTV didn't have time to dry, times 2 outlap sessions. Home Depot Racing Department aluminum brackets of shame held it in there on Sunday though. So I wasn't hammering for 45 mins in those conditions, but the 2-3 laps of it not being in there lost almost 2 quarts of a 6.5 quart system, most of it on the bottom of the car. So while not "totally" lost, it was enough to likely scar both the crank and the bearing down enough to allow ~20psi of pressure loss. You can tell it's down on power. COLD start idle with clutch depressed used to be ~112psi, now it's lucky to have 60 - but it's not random, it's got the right drops for the different stages of warm up, but the whole scale moved down 20-40psi. Gonna be tricky to find a way to "alert" in such a scenario.

If you plumb that port to your PCV, you'll be sucking in copious amounts of oil spray on throttle lift. Not sure if that outweighs the need for VAC up there. Because Evo lol.