Oil Pressure..

[ahhhhWHOA]

lately ive been having some problems blowing my IC pipes off and i think its because im putting too much pressure to my feed line and oil is blowing through my turbo into the pipes and slicking them up.

Just wondering what everyone else is seeing for oil psi at the turbo under full boost and/or just at idle or normal driving. I have my feed line run from the back of the block also and im already running a oil restrictor going into the turbo with a hole size .065" on the restictor.

Oh and vit and powder if you read this i double checked my feed line and it IS 1/4" line.


Jesse

[inis]

start with what turbo you have, every turbo has different requirements...

[ahhhhWHOA]

Mitsubishi TE04h

[ZX2Fast]

What kind of couplers and clamps are you using? How thick are the walls of your charge pipes?

[Psychotuner]

hahaha, This is funny...

First off, Yes I would put a restrictor as a turbo only needs less than 20 psi of oil.
Secondly, thats NOT why you keeop blowing couplers off, You eather need A. T bolt clamps (most lilely) or and B. 3 or 4 ply couplers. Then cheap 1 ply couplers like to "balloon" if you will and pop off.

[ahhhhWHOA]

okay here we go...

First off, as stated in the first post, i already HAVE a restrictor on my oil feed line with a hole of .065", and if im still running way higher than 20psi of oil how do i solve that problem if im already running one.

Secondly, im sure the oil in the pipes isnt helping anything by making it all slick but okay. and A. I already have T bolt clamps on every coupler, B. i ALSO already have 4 ply couplers on everything also. my cheap 1 plys that i first got were ballooning and blowing apart.

anyway, ive already solved the blowing pipes off problem as it is, but i need to know how else to lower the oil pressure because im way over 20psi even with a restrictor.. would it help to put another restrictor coming out of the block too or should i try and find a restrictor with a smaller hole?

[powder]

Restrictor for less pressure should be bigger than what you have.

Bigger = less pressure

Smaller = more pressure

Try an 1/8th inch and go up from there.

[ahhhhWHOA]

maybe im thinking of it backwards then, i figured

bigger = more opening = more oil going into the turbo

smaller = less opening to let less oil in?

so if i wanna lower the amount of oil going into the turbo i need to go bigger?

[S/R]

Yeah, think of it like a garden hose Vs a pressure washer. the garden hose is a big opening. a pressure washer has a small opening.

[Psychotuner]

All wrong, you need a SMALLER hole

[powder]

maybe im thinking of it backwards then, i figured

bigger = more opening = more oil going into the turbo

smaller = less opening to let less oil in?

so if i wanna lower the amount of oil going into the turbo i need to go bigger?

You said you want less pressure. The bigger you open the hole, the less pressure there is. Maybe more oil, but less pressure.

[straightupmad]

You said you want less pressure. The bigger you open the hole, the less pressure there is. Maybe more oil, but less pressure.

This statement is true if you are only considering pressure at or before the orifice. With a smaller hole, the oil may come out at a higher velocity, but with the decreased volume flow it does not have time to pool and create pressure (or at least not as much as it would without a restriction).

With what you are saying, everyone that has had oil blowing past their seals due to high oil pressure would be better off not running a restrictor.

[inis]

hoses aren't on straight, or no bead on the IC piping?

[Psychotuner]

Remember to address all other potential causes of leakage first -- inadequate/improper oil drain out of the turbo, excessive crankcase pressure, and use a restrictor as a last resort.
I would run a .035" restrictor. I assume you don't have a BB turbo.

[ahhhhWHOA]

Remember to address all other potential causes of leakage first -- inadequate/improper oil drain out of the turbo, excessive crankcase pressure, and use a restrictor as a last resort.
I would run a .035" restrictor. I assume you don't have a BB turbo.


ive never had a problem with my oil drain before and my oil drain line is 1/2" so i can only assume that its draining fine, crankcase pressure im not even sure how i would check that? and like i said im already running a restictor

do you know where i could buy a .035" restrictor? and yes your correct i dont have a BB turbo.

my oil pressure after warmed up when driving usually hangs up around 40psi, when at idle im down around 15, so i guess i need to put a smaller restrictor on since im running too much?

[Psychotuner]

First off, How old is your turbo? I would assume the oil is from bad seals on the turbo, that small of a turbo usually doiesnt require an oil restrictor. But thats not the main problem oif why you started this post.

I would make sure the pipes are on straight, ond bolt the T bolt clams down good. For extra assurance, I have herd of people using hair spray on the coupler.

[ahhhhWHOA]

okay, the main problem of why i started this thread was the pipes, that problem, has been fixed. gone. done. over with.

my turbo is like a week old now.

i have the feed line from the back of the block then into a restrictor, then into a T fitting which feed my oil pressure gauge and also goes into the top of my turbo, so i know im running too much oil psi into the turbo if thats what its reading at the gauge also.

but if your telling me i only need around 20psi of oil pressure and my gauge is showing me 50 obviously theres too much and itll ruin that turbo just as fast as my old one..

[BernardZX2]

With the setup clarified; yes that is too much pressure. I'm not sure how else you could lower the pressure other than getting a smaller restrictor though.

You could get oil from the head instead. That is usually a lower pressure.

[celery952]

the size of the hole should be smaller to lower the pressure, the guage needs to be behind the restriction the pressure will be higher before the restriction yes, but that doesnt matter, after the restriction, ie the turbo, will have lower pressure to it with a smaller hole


also if you ever have problems again with hoses popping off, clean everything up with brake clean and use grey silicone on the couplers thats what we use on the ford 6.0's and 7.3's that get oil seep

[ahhhhWHOA]

the size of the hole should be smaller to lower the pressure, the guage needs to be behind the restriction the pressure will be higher before the restriction yes, but that doesnt matter, after the restriction, ie the turbo, will have lower pressure to it with a smaller hole


also if you ever have problems again with hoses popping off, clean everything up with brake clean and use grey silicone on the couplers thats what we use on the ford 6.0's and 7.3's that get oil seep

the gauge is behind the restrictor but i figure the pressure would be higher after the restrictor like everyone else said because the smaller hole is forcing the oil through at a higher pressure. i might try removing the restrictor and see what the gauge shows or just find a smaller restrictor.

[Psychotuner]

make a restrictor... braze or solder in the fitting, then drill out to desired size.

[celery952]

the gauge is behind the restrictor but i figure the pressure would be higher after the restrictor like everyone else said because the smaller hole is forcing the oil through at a higher pressure. i might try removing the restrictor and see what the gauge shows or just find a smaller restrictor.

restriction creates pressure, when it goes through that hole its basically releasing pressure and flowing freely

do you understand how an ac system works? its the same as that, high pressure dropping to low pressure through an orifice to give you a large temperature decrease

[TheCrazyGuy]

Hose clamps make great oil restrictors. Tighten it down enough and you get no oil at all. Walla!

[ZX2Fast]

The head sees about 20psi less pressure. The oil galley in the side of the head is 1/8" NPT.

[ahhhhWHOA]

The head sees about 20psi less pressure. The oil galley in the side of the head is 1/8" NPT.

thanks you, ill most likely end up switching this out then for sure. Its the one thats right under the coil pack area correct?

[Psychotuner]

There is actually 2 on that side of the head, one right in the middle of the coil pack bracket, and one right above the thermostat housing they are torques bits like T35 I believe.

[ahhhhWHOA]

what is the oil feed in the back of the block? I dont remember from when i put it in but isnt it 1/8" NPT too? so i could just pull it from there and plug that hole and use the same fitting in the head for oil?

[Psychotuner]

I believe its 1/4" in the block. youll need an L fitting for the head due to coil pack clearance.

[ZX2Fast]

The one in the block is bigger. I used a T fitting in the head to feed my guage and the turbo.

[inis]

I'll take a picture of my oil feed wed night, its sweetness. And cost like 18 bucks :D

[Psychotuner]

id rather see my oil gauge in the block NOT the head.

[ahhhhWHOA]

The one in the block is bigger. I used a T fitting in the head to feed my guage and the turbo.


what are you seeing for psi from the head? i switched mine to do the same as you said a T off the head to feed both just wondering what kinda numbers for comparison, and do you have a restrictor?

[ZX2Fast]

I see about 70 psi max from the head. I'm using a restrictor on the feed to the turbo but I don't know the pressure it sees. I know it is low enough not to smoke and high enough not to lock up.