Restrictor/filter, just a filter, or just a plain turbo feed line?

[carbide]

I have searched the forums on all this stuff, but I havent really gotten a good answer for my setup.

I have a HX40 in the mail. I have no balance shafts, unported oil port. I am worried about excessive oil pressure for this turbo and I have a few questions:

Would an inline oil filter and feed from the head be safe enough? Or would I still need some sort of restrictor?

Would an inline oil filter and feed from the oil filter housing have low enough pressure to be ok? Or woul I still need a restrictor?

Would a feed from the head, without any filter or restrictor, be OK for my Holset?

I honestly have no way to measure my oil pressure at the moment.

Thanks!

 

[carbide]

anyone?

 

[kris_stewart10]

well first off i dont want to be an a$$ but thread bumping is not allowed

but yes an inline oil restrictor would be useful on that turbo you dont need over excessive oil pressure

and maybe not an extra oil filter

 

[carbide]

well first off i dont want to be an a$$ but thread bumping is not allowed

but yes an inline oil restrictor would be useful on that turbo you dont need over excessive oil pressure

and maybe not an extra oil filter

Thanks for the advice about the bumping, I will refrain from now on.

And, thanks for the response! I think I am going to go with an FP inline filter and restrictor, but I don't know if I should feed from the head or filter housing.

 

[blacksheep86]

Yes use a restricter off of the oil filter housing.

 

[JusMX141]

Definitely use a restrictor from the filter housing, no smaller than .060" and probably no larger than .080"

A filter isn't necessary, but I plan on running one. It doesn't add restriction unless it's clogged, and it will save your turbo in case something happens to the engine.

I don't like restrictors because they not only restrict pressure but volume as well. I'm planning on running my HX40's oil supply from the head unrestricted with an inline filter.

 

[kris_stewart10]

like that guy said he is not running a restrictor i would if i were you because you definetely do not want to blow a seal or put too much pressure on the bearings but probably a .060 restrictor would be nice

 

[carbide]

Will a filter reduce pressure at all? I would think it would a little bit?

I am just afraid I'll have excessive pressure at the cylinder head, I assume I'll need a restrictor.

At the same time, I'm afraid a restrictor may end to a shorter life when fed from the head of my car due to reduced volume to the very thirsty journal bearing turbo.

 

[JusMX141]

At the same time, I'm afraid a restrictor may end to a shorter life when fed from the head of my car due to reduced volume to the very thirsty journal bearing turbo.

DO NOT use a restrictor on a journal-bearing turbo that is fed from the head.

Restrictors are only required to reduce oil pressure on turbos that are fed from the filter housing, where excessive pressure would blow oil past the seals possibly ruining the journal bearings in the process.

 

[carbide]

I keep hearing so much back and forth stuff. I'm gonna try an FP journal bearing restrictor and filter from the OFH. If not I'll go the nitrous jet route.

 

[JusMX141]

If you run the oil supply unrestricted from an unported filter housing on an engine with no balance shafts, you're going to kill that turbo or at least put it at a much greater risk of premature death.

Even if you run a plain -4an line with no filter and use a Garrett Ball Bearing restrictor (.030") and drill it to your desired size, as I did with this customer's HX35 (drilled to .062"):

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