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Hx 52

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Sir Joke

15+ Year Contributor
37
0
Dec 11, 2007
Eau Claire, Wisconsin
Anyone have any idea what i should be running for lines and restrictors. Everyone has a different answer including on the forums so im not sure which route i need to take. I heard no restrictor with 4an in and 12 out is good.
Any opinions?
 
I asked a member on here that has ran 3 Holset 52's (biglady112) and he said he runs a -4 line from the OFH with a .065 restrictor and a -10 return. I plan on running the same setup with a -12 return. He said he has had no such problems with all three. I have not ran this yet as I am still working on the setup but that's what I am going to do. I hope this helps.

Eric
 
I have an HX52 as well. Two actually.

Feed: -4AN from the Oil Filter housing with a restrictor

Return -12AN

BUT every motor will be different, and among other items to consider.. whether or not you have balance shafts plays a big part in what the turbo will see in terms of pressure.

You need to know what your actual feed pressure is, this goes for any turbo really.

Get a T-fitting that will let you put in a gauge after your inline filter and before the turbo.

It may seem expensive or unnecessary.. but would you rather be out $70-125 for a fitting, restrictors and a gauge.. or $500-1900 for a new turbo.
 
I don't know that I'd restrict it at all. That's a big turbo, not a piss ant HX35. I'd definatly go -4 unrestricted. More oil pressure is better than not enough pressure. High pressure can make it smoke a bit, but goes away when you fix the pressure. Low pressure makes you buy a new turbo.

I run -4 unrestricted to my HY35, with over 100psi at the filter housing. I get about 75psi at the turbo. keep in mind that the line itself will be a "restrictor" I also run a -12 drain, but I was fine with a -10 piece of shit that had a kink in it.


Finally, I work on a diesel pull truck. Its a duramax, and we make about 1500bhp. We run a HX60. It has its own oil system, we feed it with a -6 line unrestricted at 100psi, it drains via a -16 into its oil tank. After about 100 passes (pulled two classes and lots of dyno pulls) its still tight as it was new. We run almost 70psi boost.

Blindly restrict if you want, but I would get a gauge on it right at the turbo and see what the pressure actually is.
 
Im not worried about money i would like to complete this setup right. I will take a look into setting that up.
 
I don't know that I'd restrict it at all. That's a big turbo, not a piss ant HX35. I'd definatly go -4 unrestricted. More oil pressure is better than not enough pressure. High pressure can make it smoke a bit, but goes away when you fix the pressure. Low pressure makes you buy a new turbo.

I run -4 unrestricted to my HY35, with over 100psi at the filter housing. I get about 75psi at the turbo. keep in mind that the line itself will be a "restrictor" I also run a -12 drain, but I was fine with a -10 piece of shit that had a kink in it.


Finally, I work on a diesel pull truck. Its a duramax, and we make about 1500bhp. We run a HX60. It has its own oil system, we feed it with a -6 line unrestricted at 100psi, it drains via a -16 into its oil tank. After about 100 passes (pulled two classes and lots of dyno pulls) its still tight as it was new. We run almost 70psi boost.

Blindly restrict if you want, but I would get a gauge on it right at the turbo and see what the pressure actually is.


Which is pretty much exactly what I just told the gentleman.

There are pressure specs for the 50/52/55 CHRA and they come on OOR Volvo D series tractors running ~3 bar boost, so I would try and aim for what the OE recommends and fine tune from there if you find it necessary.

FWIW 75psi is at the exact upper end of maximum hot oil pressure under load per the book.

I am only aiming to be running upper 40s low 50s boost pressure, but even at 70psi I dont know if the associated torque and thrust loads on the wheel/shaft would warrant running more than that.

Granted you're atleast letting it escape through a -16 line..

But I am still looking into that for the compound setup I'm building for my 1.5l Honda project is using 3 MHI journal-bearing units. I have found some discussion from the 14B guys routinely running north of 25psi proposing that running greater than recommended pressure to keep things happy.

So for now this looks like its going to be my oiling solution:

Derale remote fluid cooler and 7" fan: Derale Cooling Products 13730 - Derale

Tilton 2GPH diff pump rated for 265*F and 60psi: Tilton Engineering 40-524 - Tilton

Moroso 1.5QT Accumulator: Moroso 23903

Remote filter adapter: Trans-Dapt Performance Products 1313

Summit Coolant Temp and Oil Pressure gauge pod and sending units: Summit Racing SUM-G2924

Fram oil filter: Fram PH8A

Then just need to have a 4QT tank welded up, a handful of adapter fittings and some -4AN braided SS line.

Should be able to feed and cool all 3 turbos.

Thought that may provide some food for thought on the oiling discussion LOL

Edit: Well apparently all the links got eaten, I may add them later when I get a minute..
 
Which is pretty much exactly what I just told the gentleman.

Other than restricting it. I just personally wouldn't, unless it was something like 100+psi at the turbo. If it was 80-90, I'd defiantly leave it. Too much oil is always better than not enough.


That oiling system sounds like its gonna weigh more than the engine itself.

Why not dry sump it and have an extra stage for teh turboz? With all the oil cooler nonsense it must be some lsr thing, that will spend long periods at boost...You'd definatly benefit from the better oil control.
 
Other than restricting it. I just personally wouldn't, unless it was something like 100+psi at the turbo. If it was 80-90, I'd defiantly leave it. Too much oil is always better than not enough.


That oiling system sounds like its gonna weigh more than the engine itself.

Why not dry sump it and have an extra stage for teh turboz? With all the oil cooler nonsense it must be some lsr thing, that will spend long periods at boost...You'd definatly benefit from the better oil control.

I did say restrictors as in a variety of them, to test out leaving none as an option. :D

Your right, it is going to be a hefty oil system. There is a dry-sump system available through HPD for the motor already but you need to have an SCCA license, the bastards.

Those components are going to be for making a seperate oil system entirely, as Im sure youve surmised.

The Honda will be used eventually for Standing Mile/LSR once all the bugs are worked out and it is sturdy enough to daily drive my 17 mile commute.

Two DSM T25 compressors feeding a 14B.
 
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