Turbos and really low oil pressure
05-12-2011, 10:35 AM
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Turbos and really low oil pressure Hey guys,
have twin journal bearing turbos and forced performance said they need the best possible oil supply and return due to the bearings they put in them.
I am running -6 oil feed lines with no restrictions and -10 drain lines.
I drove it the other day in almost 100* weather and while cruising, it was hovering around 24-25 psi, BUT when I stopped at red lights, it would drop to about 13 psi. This is with oil temps in the 230's.
I drove the car the other night when temps were around 80* outside and it did a little better.
The oil pressure sensor in the APS kits are relocated to the oil distribution block that feeds the turbos.
Is this something I should be concerned with?
Would running -4 feed lines help?
have twin journal bearing turbos and forced performance said they need the best possible oil supply and return due to the bearings they put in them.
I am running -6 oil feed lines with no restrictions and -10 drain lines.
I drove it the other day in almost 100* weather and while cruising, it was hovering around 24-25 psi, BUT when I stopped at red lights, it would drop to about 13 psi. This is with oil temps in the 230's.
I drove the car the other night when temps were around 80* outside and it did a little better.
The oil pressure sensor in the APS kits are relocated to the oil distribution block that feeds the turbos.
Is this something I should be concerned with?
Would running -4 feed lines help?
05-12-2011, 05:06 PM
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It doesn't seem like many people think 230* is THAT high on a 100* day in the humid Louisiana heat. Yeah, Im 100%. It's not blowing smoke or oil, only a little fuel because its not tuned yet.
05-12-2011, 05:13 PM
#5
If 230* was the highest it went during a full on flogging then no it isn't too bad at all. If that is where it was on just driving I would get a cooler. Also you might want to try a thicker viscosity oil with it being so hot where you are. What oil are you running now?
05-12-2011, 05:19 PM
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If 230* was the highest it went during a full on flogging then no it isn't too bad at all. If that is where it was on just driving I would get a cooler. Also you might want to try a thicker viscosity oil with it being so hot where you are. What oil are you running now?
I am running Rotella 5-40 synthetic.
05-12-2011, 05:24 PM
#7
Maybe some people more familiar with high temp areas will chime in on the oil situation. I run 0-40 here in Buffalo NY where it snows year round haha. I have an oil cooler from an R1 RX7 in my basement that I was going to sell on rx7club if you wanted.
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05-12-2011, 05:28 PM
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I've checked out one from Jegs that has -10 inlet and outlet which would be perfect because thats what size my oil return hose in. Seems it would be most cost effective.
05-12-2011, 07:36 PM
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My feed for my turbos comes from the stock oil pressure sensor location (top, rear of block). It doesn't feed from the oil filter location like a lot of systems.
05-12-2011, 07:41 PM
#11
hey 02black, my oil temp goes way up there too.... Although i'm running an iron block, my oil temps mid summer will go a high of 240 - 250 degrees. When at that temp, my oil pressure idles around 14 pounds of oil pressure. My turbo's have a seperate oiling system and don't see those temps but wanted to give you some engine oil reference with our hot/humid days in louisiana. I also need to get an oil cooler.... Good luck man p.s... great car!
05-12-2011, 08:29 PM
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hey 02black, my oil temp goes way up there too.... Although i'm running an iron block, my oil temps mid summer will go a high of 240 - 250 degrees. When at that temp, my oil pressure idles around 14 pounds of oil pressure. My turbo's have a seperate oiling system and don't see those temps but wanted to give you some engine oil reference with our hot/humid days in louisiana. I also need to get an oil cooler.... Good luck man p.s... great car!
This is Corvette-Chris, BTW. LS1Tech wouldn't let me change my screen name on here. LOL
05-12-2011, 08:48 PM
#14
oh, hey chris... didn't realize. I may also try a thicker oil in my engine.....damn engine runs hot down here so i'm kinda kicking around the idea of two small a/a intercoolers instead of one big one. Just not enough air flow which drives up the water and oil temps. Let me know what you do, tracy
05-12-2011, 08:52 PM
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oh, hey chris... didn't realize. I may also try a thicker oil in my engine.....damn engine runs hot down here so i'm kinda kicking around the idea of two small a/a intercoolers instead of one big one. Just not enough air flow which drives up the water and oil temps. Let me know what you do, tracy
05-13-2011, 11:16 PM
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Sorry to highjack, but would it be ok to put an oil cooler in the return line from the turbo? Or would that impede oil return too much? Where's the best place to put one?
Nope.. 
X2.. 