Do I need an oil line restrictor

[Pasquin]

Do I need an oil feed line restrictor on a mitsu 20g, I want to run my feed line from the filter housing. I ran my 14b just fine from the filter housing with no restrictor i just wanted to be sure I'm not going to mess the new turbo up.

 

[dsmmike50t]

I never had one on my 20g.

 

[Black95awd]

no, you only use a restrictor with a BB turbo.

 

[SBR Joe]

^^^^^ What he said.



Joe

 

[Supa Dexta]

no, you only use a restrictor with a BB turbo.

False.

 

[TurboTsiThatFly]

False.

agreed. atleast i do believe.

 

[Supa Dexta]

I know.

BB's need less pressure which is why they are most always fed from the head, some even require a restrictor there. Journals need a resrictor too depending on pressure, my borg for example needs one, as told by BEP, if the pressure seen at the turbo is more then 65 psi at WOT. So since our cars can see that no problem, that makes it a large journal turbo, off the filter housing, 4 an feed with inline restrictor.

 

[dsmmike50t]

I've heard what Black95awd said a couple of times now on this board, but my holset is not BB and you need an oil restrictor to run the hx40. I have never heard about anyone running an oil restrictor on a 20g, so don't worry about it.

 

[SBR Joe]

False.

You should never have a restrictor fitting on a journal bearing turbo. Have you ever seen the pin hole that is provided for the oil to enter the turbo in the CHRA? With a restrictor fitting there would be barely enough to suffice. Journal bearings need a constant (relatively larger amount) of oil opposed to a BB turbo. I would never use a restrictor fitting in a journal bearing turbo, smells like trouble.


Joe

 

[Black95awd]

I have never once used a restrictor in a JB turbo. I have never had an issue. Also I believe SBRJoe Has a BEP S256 with no restrictor.

Joe, can you please verify this for me?

Oliver

 

[SBR Joe]

I have never once used a restrictor in a JB turbo. I have never had an issue. Also I believe SBRJoe Has a BEP S256 with no restrictor.

Joe, can you please verify this for me?

Oliver

Confirmed. No restrictor fitting.


Joe

 

[Supa Dexta]

Thanks joe, but I'll take the manufacturers word. And what pin hole are you talking about? The one in the restrictor? (I'm using a restricted inlet fitting, but I have drilled it out somewhat) And as stated you can blow the seals out depending on turbo, and pressure..

 

[SBR Joe]

Thanks joe, but I'll take the manufacturers word.

I do believe PTE and FP (correct me if im wrong) will agree also. Im not trying to start a flame fest or bash anyone, despite what you may think. Im just telling what i have been told, and doing for years. You may be able to use a restrictor fitting, but i see no need to unless you are running a BB turbo because it will blow past the seals in a BB setup, it wont in a journal bearing unless there is other underlying factors (i.e. too small return line, bad seals, etc).


The pinhole im talking about is the actual oil feed in the CHRA, the inlet for the oil feed. If you look down inside its very small to begin with. A restrictor fitting my not supply it with enough oil, especiall if the feed location is off the head.

Joe

 

[Supa Dexta]

No I don't want to argue either, but I do want to make sure my set up is correct. It's been a concern of mine, ever since BEP sold the restrictor to one guy with a 362 for him to run, then when I asked they told me "not to run one, unless the pressure is over 65" (which it is) I haven't fired mine up yet. So what I did was buy the restricted fitting, and then drill it out some (since I couldn't go down a size had I bought an open one)

I'll admit the restrictor fitting does look dangerously small, so I just went ahead and drilled it out some before mounting it, hopeing to find a good medium..

 

[SBR Joe]

No I don't want to argue either, but I do want to make sure my set up is correct. It's been a concern of mine, ever since BEP sold the restrictor to one guy with a 362 for him to run, then when I asked they told me "not to run one, unless the pressure is over 65" (which it is) I haven't fired mine up yet. So what I did was buy the restricted fitting, and then drill it out some (since I couldn't go down a size had I bought an open one)

I'll admit the restrictor fitting does look dangerously small, so I just went ahead and drilled it out some before mounting it, hopeing to find a good medium..

Ill actually do a little research on this subject. Tomorrow ill talk to PTE, Bullseye, Kinetic, Blouch etc. Ill post up what the answer is from each vendor tomorrow so there can be factual words spoken from each.


Joe

 

[Supa Dexta]

Thanks man. It's been a bit of an issue with me to get straight facts out of BEP. They have no problem to you sell things, but getting anymore info out of them isn't easy. Their fourm is also useless. This is EXACTLY why I bought the restricted fitting, so that I could drill it out if need be. But since I've talked with two others that have 362's, one running the restrictor, and one running a filter as a restrictor, I figured I was safe.. Although I have both a 4an filter, and half a restricted fitting..

Sucks being the first guys to try new things... And it's not exactly easy to plumb in an oil gauge at the turbo, or remove the non restricted fitting, to replace with a restricted "if the turbo smokes" as per bep's instructions.. Thats exactly what I want, fire up my new build to see if it smokes, only to tear it out again..

 

[Pasquin]

So should i put one on my 20g or not I've seen 20g kits with oil restrictors

 

[SBR Joe]

So should i put one on my 20g or not I've seen 20g kits with oil restrictors

No.



Joe

 

[BootlegGreg]

I have an sbr m40 which has the same center section i believe? I feed from the head just fine with no restrictor.

P.S. Joe i bought this turbo used. Do you think you could PM the specs to me?

 

[SBR Joe]

M 40??? No such thing. The feed from the head with no restrictor is fine.



THe general consensus i got from BEP, KNE, etc. is that generally, no you should not need a restrictor fitting on a journal bearing turbo unless its getting too much oil pressure and blowing by the seals and is smoking. Kind of a broad answer but thats what is up. 98% of the time, no restrictor fitting.


Joe

 

[SuzukiRidr326]

my buddy has one on his Boosted Civic Hatch dunno if it has any relation to DSMs though

 

[SBR Joe]

my buddy has one on his Boosted Civic Hatch dunno if it has any relation to DSMs though

An M 40??? No such thing that we sold. We sell G 50/60 and BEP m trims...



Joe

 

[dsm-onster]

I've heard what Black95awd said a couple of times now on this board, but my holset is not BB and you need an oil restrictor to run the hx40. I have never heard about anyone running an oil restrictor on a 20g, so don't worry about it.

No. You only need a restrictor for the hx40 if you're not running b-shafts. the hx tubos can handle any pressure a *journal bearing* garrett can handle. I'm feeding my h1c and several others are feeding their holsets with no restrictor and b-shafts.

If you have no b-shafts is when you need to look at getting a restrictor. MHI turbos don't mind oil from the oil filter housing as long as pressure isn't over stock. They are designed to operate on oil pressure from the head; much lower than at the filter housing. I've had more than several MHI turbos blow oil past the shaft seals with a 4g63 with b-shafts removed.

Your spool can suffer from more oil pressure. . . Don't you have a stock 14b oil feed line?

 

[Pasquin]

I put it on and ran it with no resrictor and it's not smoking or any thing but the spool up is pretty weird.
I have a balance shaft eliminator also but the reason i ran it from the filter housing is because i had a nice braided still oil line to use. I could get a stock 14b oil feed but I'd rather use a resrictor and run it from the filter housing.

Do you think if i had less oil pressure to the turbo i would have a better spool up?

 

[dsm-onster]

It's been known to help.

Why not try it from the head? Mitsubishi meant for the 14b to spool to 150K rpms for hundreds of thousands of miles fed from the head. Same basic center section. A 20g compressor will likely never see that rpm even strung out to 45+ lbs/min.

Pretty vs. function