I was smart to want to test the car a little more, a little longer with the test oil in it. Went as far as adding in another 5 gallons of gas and got in it for one last 2 mile loop test. Didn’t make it out of the driveway.
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Oil out of the exhausts again. At least it was outside when I sprayed it out. I turned the car on and let it idle, gave it some light revs, changed its position and got out to check. Back to square 1….with more data. Better position to be in than with less data.
What’s happening? I am now unconvinced this pump can handle my 2 turbos.
It did perform the best so far in its original state with tank, vent plugged, restrictors, no regulator but that long drive to get an alignment the turbos were smoking and that was when the oil return first started to reveal it wasn’t adequate. From there my changes didn’t alleviate the accumulated oil already in the exhaust and with testing my changes I quickly blew that accumulation out of the exhaust.
So back to the more recent changes I believe what’s happening is an oil return that is slightly unable to keep up. I say slightly bc it will appear at first like it is ok…..while the more idling the more the return accumulates oil in the lines…..not being able to keep up and stay ahead of the oil feed….the excessive oil accumulates and not before long….it compounds into blocking up the oil return, causing oil to be forced through the turbo seals into the exhaust and as my exhaust is positioned it pools….so with some revs or 2500-3500 rpm as I back up my driveway in gear, it then gets sent out of the exhaust onto my fenders.
It actually helps to deal with this to write about it. Bc man oh man am I frustrated.
Oil feed data. Garrett includes oil feed restrictors to force around 40 psi max pressure in a universal application. I decided to add a regulator which would force max 40 psi before the turbos in their feed line. Bc of that I wouldn’t need restrictors and I know I don’t….however it appeared I did bc I blew oil out but that oil I’m going to say had already made its way passed the seals (remember when my turbos were smoking on the highway and I got it towed home) and had already pooled a little. So I made my changes to the regulator and said…oh no I should put restrictors back in. I then for the first time clean everything bc of no choice at that point. Now I’ve got a regulator restricting max 40 psi to the turbos AND restrictor fittings ….so I’m doubling up on oil restriction to the feed. There’s no possible way it could be seeing more than 40 psi feed pressure. The regulator does that….without the regulator the restrictors do that….so with both it wouldn’t matter if the car made 140 psi how would it over flow the regulator and restrictors?? So I’m ruling oil feed out. It’s restricted twice.
Oil return data. Why did it last the longest with a tank and plugged vent even though it eventually couldn’t keep up. Well the tank allowed oil to accumulate there instead of backing up the lines so easily. Unplugging the vent made some weird syphon happen into the catch tank. Now no tank and no vent, equal length oil return hoses into a Y…plumbed directly into the pump with no filter. Shorter plumbing altogether and why did it back up? I am using 1 pump capable of 1-3 GPM….so it flows more if it needs to?? That’s cute. Well with 2 (-10) oil returns combined into 1 hose has to then go through a 3/8 NPT inlet and outlet pump. The pump is the restriction. I’ve searched for a better single pump but I see the same specs….every pump seems to be standard 3/8 NPT to whatever you want -6, -8, -10. So perhaps bc of their physical size, the 3/8 NPT seems to just be what it is as it goes through the pump. You have to remember it’s typical to do remote rear mounted turbos so just think about how long those hoses are..so my short hoses are certainly not too long. It has to be the pump. 1 pump just can’t keep up. I can admit maybe my oil feed is stronger than it should be but the 1 pump isn’t handling it.
Sounds of the pump. I know what it sounds like when it’s pulling all fluid and when it’s pulling air/fluid. Bc of my issues I recently would turn the car off and let the pump run a little longer like 10-15 seconds or more. I did notice that for about that long it sounded like all fluid and then I could audibly hear it change over to pulling air/fluid. So that right there says oil is accumulating in the lines. Matt Pohnan listening to me talk about it jumped on that detail and said it should sound like it’s pulling air/fluid the whole time. That pump isn’t strong enough. It can’t stay ahead of the feed. It just gets a massive head start when I remove or redo everything and it all starts out empty. It’s not powerful enough.
I’m taking a step back like I did with the PCV system. And what did I do then? I did a crazy 1 and done setup…if you can’t vent enough I tried to vent too much. Like this oil return….if you can’t return too much…I want to try to return too much. Should just drop the pan. Weld 2 (-12) fittings on it. Buy another Turbowerx scavenger pump….each turbo drains into their own pump…and gets sent back to the oil pan in their own wide open -12 line. Now what?? I’ll be proud to hear 2 pumps pulling air/fluid at all times and take it as a compliment if I need to remove the restrictors again and just let the regulator do its job. F this shit!
Yeah the VVT solenoids were just torn and the sealant did its job. So I am back to oil return issue only at this point. I was going to take her out for a longer but cautious drive to take some pics. Still unsure so leaving the front bumper off. Nope….didnt make it out of the driveway. Look at all that oil that came out
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I need to clean that power steering fluid off the driveway. That looks like shit.
