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holset oiling requirement at idle

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aguiga

10+ Year Contributor
130
3
Dec 2, 2009
Texas
have a holset hx40 with a restrictor and idle set at 900rpm. measuring the oil pressure i read 5-8 psi at idle when fully warmed. about 70-75 psi by 7500 rpm. what are people doing to increase the oil pressure at idle for the turbo. just run a heavier oil? running 10w40. or just remove the restrictor. but it will run higher pressure by redline. i keep reading its suppose to not fall below 10psi at idle
 
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yea i researched it im getting the recommended amount by redline but not enough at idle. i dont wanna drill it out larger and than go over 80 psi at redline if im getting 5-8 psi at idle. maybe i just have to increase my idle to 1000rpm to get the idle to read 10psi of pressure at idle
 
yea i researched it im getting the recommended amount by redline but not enough at idle. i dont wanna drill it out larger and than go over 80 psi at redline if im getting 5-8 psi at idle. maybe i just have to increase my idle to 1000rpm to get the idle to read 10psi of pressure at idle

Sir, your cars engine doesn't produce more than 8psi at idle. I sugggest doing more research
 
Yep, I feed from the OFH, no restrictor and huge drain. After toasting serveral HX40's and having Jus rebuild them or repair them (usually), he has ALWAYS told me that whatever I am doing for oiling to the turbo, keep it up, because they show NO signs of wear on the thrust surface.....so I have about 15+ at idle and I am sure 80+ at 8700rpm's. If it weren't for the .55 housing, I would have never had a problem but those get my shafts red hot and I snap them. That is why I went T3 into a .70 housing and no more problems. I am pretty sure Jus would say the same thing. His pitch to me is as long as I have a more than suitable drain so the oil doesn't pool, it is working perfect. I did get a kink in my drain once and it was noticeable right of the bat, so I climbed under, changed it's routing a little and went on about the day.
I say feed it and feed it good and take the restrictor out. My 02 from my own experience.
 
I just got done making my 12 an fitting set up for my hx40, im going to see how it goes , i will switch to a t3 next year twin scroll set up,hoping not to go through the turbine issues my good friend marty has had. My set up is nice with good drainage.
 
You wont Vic, I can tell you what NOT to do LOL. The thing for me, really, was the fact that I run only E85 and that stuff is HOT.
 
ill try that out. my drain line is a factory holset drain tube with the 1g oil drain flange welded on to the pipe to make it a direct bolt on and enlarged the hole on both the flange and the oil pan to match the hole.ill take the restrictor out and try running maybe like a 20w50.im on 10w40 right now. and maybe increase the idle to like 950-1000 rpm.i have the oil filter housing ported.and have no balance shafts
 
my holset hx40 pro actually has a fp31 turbine housing thats been machined to fit the hx40pro ten blade turbine wheel.i also was runing the bep bolt on and got rid of that housing.
 
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