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Let's talk 4G63 Turbo Oil Feed / Supply Locations- ALL TURBO BRANDS

Posted by JusMX141, Feb 17, 2008

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  1. JusMX141

    JusMX141 Moderator

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    I often have customers confront me with the question of where to get their oil supply when buying an upgraded rebuilt turbo from me. As long as it's a TD05H, the answer is simple...but T3's? Holsets?

    I know the answers are out there in random threads, but searching for specifics is often difficult and confusing....I wanted to create this thread to help make things easier for those searching.

    So let's hear it- where are you getting your oil supply from for your turbocharger? Does it seem to work well?

    I understand the factory journal bearing Mitsu turbos get their oil from the head, but is that the ONLY turbo (aside from ball bearings units) that you should supply from the head? Anyone running their Garrett T3's or other journal bearing turbos from the head, and why?

    How come all factory Mitsu turbos have their line from the head, but most 2G install kits come with a braided stainless line that goes to the filter housing? If the head is the best source for a Mitsu turbo, why change?

    How about restrictors....I know they only restrict volume and not pressure; but are they only needed on ball bearing turbos? If not, when would you use a restrictor for a journal bearing application?

    You guys see what I'm getting at. Any input is appreciated in advance!
     

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    1998 Mitsubishi Eclipse GST
    manual · 2G DSM

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    1997 Mitsubishi Eclipse GSX
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  2. prostreetdsmx1

    prostreetdsmx1 Proven Member

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    Typical rule of thumb is journal bearing = Oil Filter Housing, BB = Head.

    The head has siginificantly less oil pressure than the filter housing so ball bearing turbos fail pretty quick with that much pressure while Journals simply don't get enough from the Head.

    Most garrett/BorgWarner/Holset turbos will begin to fail quickly when drawn from the head. It will start to smoke quick and then kiss it good bye.

    Restrictors help provide a consisent, lower pressure for Ball Bearing turbos. Most of them come with them these days too. If you run a restrictor on a journal turbo pulling from the oil filter housing it will fail.
     

    442  0

    1996 Mitsubishi Eclipse GSX
    13.100 @ 104.100 · 2G DSM
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  3. blcknspo0ln

    blcknspo0ln DSM Wiseman

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    Central, New Jersey
    Agreed. I run a ss line from the head (with an earl's inline oil filter) to a PTE-supplied restrictor to my BB 5031. If you have your BS removed and did not port your OFH, you have a large chance of running 80+psi through the oil line @ WOT if you feed through the OFH OMG
     

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    1995 Eagle Talon TSi AWD
    12.030 @ 118.070 · 2G DSM
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  4. turboglenn

    turboglenn Proven Member

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    RIpley, West Virginia
    I took a LONG apprenticeship in turbocharger building and machining for custom apps at Majestic Turbo in Waco TX. when Kevin Drapen owned it. And While I agree that a ball bearing turbo needs less oil and pressure. I do not agree with the statement you made above.

    I've drawn oil for my T3/4 57 trim hybrid from the head for over 75,000 miles and there's no signs of shaft play yet. My reasoning is if the stock mitsu turbo was going to last 100k miles and was journal bearing and fed from the head, then my Garrett should be just fine ( i am running a 360* thrust bearing in it though). I could easily go get a line made to feed it from the housing, but I've never had an issue at the head yet. A NON-BB turbo needs just enough oil to keep a film on the bearing surfaces (that's why the hole going in has a tiny hole to restrict it and the outlet is huge, so the oil gets out fast and easy), if there's enough oil there for the cams, i believe there's enough for a turbo. Now I'm not sure on the complete path that the oil takes through he head, so some one correct me if I'm way off on something. But like i said 75k + miles so far (probably a lot more honestly) being fed from the head and NO issues.

    OH and i beat the living hell out of my car when I'm running it hard, i drive it like a 2 stroke dirt bike. The turbo has lasted through 2 motors and still no in and out shaft play and only enough side to side to be considered in good shape. (remember, no side to side = coked or bad center cartridge)
     
  5. pballer

    pballer Proven Member

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    has anyone ever fed a BB GT series such as a GT35R using a supply from the filter housing with the stock 2g oil restrictor? does anyone know the size of the 2g restrictor hole?
     
  6. prostreetdsmx1

    prostreetdsmx1 Proven Member

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    I've typically seen the BB's die when pulling from the housing with no restrictor. We are always sure to include a restrictor with each turbo that needs it (BB)
     

    442  0

    1996 Mitsubishi Eclipse GSX
    13.100 @ 104.100 · 2G DSM
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  7. Black95awd

    Black95awd Proven Member

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    stock 2g is a flare fitting, certainly not a restrictor. if you are running a BB turbo buy the proper fitting. no sense in replacing a turbo when you dont need to.
     
  8. Black95awd

    Black95awd Proven Member

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    Bangor, Maine
    WTF 2g comes from the filter housing *area* stock. you only need a restictor on a BB turbo, it would cause a journal bearing turbo to fail prematurely
     
  9. JusMX141

    JusMX141 Moderator

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    Correct- but if you buy a 2G install kit for a MHI turbo from some vendors it comes with a hard oil line that connects to the head just as a 1G does, and some come with a braided stainless line to replace the 1/4" flare line that the T25 uses.

    The statement of mine that you quoted was asking that if I were installing a MHI turbo on a 2G (replacing the T25) would it be better to go with the housing/braided line or head/hard line. By "factory Mitsu" in my post, I was referring to the MHI turbos on 1G's....not the Garrett's on 2G's.

    The whole meaning of this thread was to test the waters and see if anyone had better luck with one location over the other concerning journal bearing and seal life on various turbos.
     

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    1998 Mitsubishi Eclipse GST
    manual · 2G DSM

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    1997 Mitsubishi Eclipse GSX
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  10. timloomis

    timloomis Proven Member

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    I think my -04 feed line from the ofh just ate my rebuilt 14b. It has side to side, plus in and out. Balance shafts removed and no porting of the relief valve either. The turbo only had 10-15k on the rebuild, so either the sky-high pressure did it, or the thrust bearing feed hole is plugged or something. A faulty rebuild kit could be at fault too, I dunno.

    And I just went back with a stock feed line off the head last week. Blows less oil under boost, but still burns it.
     

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  11. daren_p

    daren_p DSM Wiseman

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    What FP recommends for their FP30 series of turbo's (so I would assume goes for other Garrett GT turbos as well) is too be run from the head & install their inline filter as well which includes a .030" restrictor. This has worked great for me so far.
     

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  12. ILLiCliPSE

    ILLiCliPSE Proven Member

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    Exactly the way I went with my new FP3052:thumb:
     

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  13. 92awddsm

    92awddsm DSM Wiseman

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    Sorry Martin but I have to disagree with you. With my pte 5252(60-1, stage 5 turbine) I was feeding from the filter housing unrestricted and all I got was slow spool and a smoke show. I ended up restricting the feed to .080" about 2 yrs ago. Turbo still spools quick and no bearing failure to date.
     

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  14. prostreetdsmx1

    prostreetdsmx1 Proven Member

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    Keith,

    I know what you mean. I've seen it work before for people but I've seen it fil a lot more than anything as. As a shop owner I have to error on the side of caution and go with the safe bet.
     

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  15. 92awddsm

    92awddsm DSM Wiseman

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    I totally understand where you are coming from. But coming more from experience and not as a shop owner, you know that with some garrett turbos and a large amount of oil pressure, some sort of restriction may be required in some applications, true?
     

    684  0

    1992 Eagle Talon TSi AWD
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  16. JusMX141

    JusMX141 Moderator

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    I'd like to know this as well.

    I rebuilt a Bullseye T04B V-Trim once (Uses a plain Garrett T3 dry CHRA) and resold it and the customer who bought it complained that it burnt oil. He was pulling his oil unrestricted from the filter housing. I got the turbo back and pulled it down and found absolutely NOTHING wrong with the turbine seal or the groove that would cause it to burn oil. I reassembled it and used it on my buddy's 1G pulling from the head and he ran that turbo for 2k miles with no problems.
     

    2K  0

    1998 Mitsubishi Eclipse GST
    manual · 2G DSM

    5K  14

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    2K  0

    1992 Eagle Talon TSi
    manual · 1G DSM

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    1993 Eagle Talon TSi AWD
    manual · 1G DSM
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  17. 92awddsm

    92awddsm DSM Wiseman

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    On my car, I have always had to restrict oil feed to the turbo(all garrett chra's) to keep from pushing oil past the seals. I even noticed that it dramatically increased spool time while pushing oil.
     

    684  0

    1992 Eagle Talon TSi AWD
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  18. majik2k5

    majik2k5 Proven Member

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    This is something I've been having some issues with.

    Where abouts can you get decent oil restrictors?? I just had a journal bearing 60 trim let go on me, along with another journal bearing 50 trim replacement that's starting to smoke now. Both were fed from the oil filter housing, through an external oil cooler, and then into the turbo. My balance shafts are gone, along with the ported relief valve, so I'm in dire need of a good restrictor. I'm going to try to save my 50 trim on the car now.
     

    323  0

    1996 Eagle Talon TSi
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  19. Kezden

    Kezden Proven Member

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    so if you feed from the OFH and use a restrictor then that should be fine on a BB turbo?
     
  20. 92awddsm

    92awddsm DSM Wiseman

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    I just use nitrous jets and machine the inlet fitting to accept it. All that is required is to just machine the flare from the -4am fitting and the nitrous jet drops right in and replaces the flare.
     

    684  0

    1992 Eagle Talon TSi AWD
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  21. majik2k5

    majik2k5 Proven Member

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    What exactly did you machine on the nitrous jets? I just pictured the jets being to small to thread into the feed on the turbo.
     

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  22. 92awddsm

    92awddsm DSM Wiseman

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  23. brute

    brute Proven Member

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    You aren't worried about the jet coming out?

    Maybe with an fittings, there is a better seat for the nozzle to sit in, but if you were using a nipple and hose it may be sketchy.
     

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  24. 92awddsm

    92awddsm DSM Wiseman

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    You shouldnt be using a nipple and a hose for the oil feed line. You are just asking for problems

    And there is no way for the jet to fall out with the line connected.
     

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  25. Savage Talon

    Savage Talon Proven Member

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    I did not want to mess with jets to bring down the pressure. All I did was buy the black FP filter for BB turbos and drilled out the hole to what I wanted. It's is easy as that, and you get extra protection from the filter.
     

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    1991 Eagle Talon TSi AWD
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