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1G Turbo feed from OFH - 92

Posted by TK's9d2TSi, Sep 6, 2019

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  1. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    I'll be feeding the turbo from the ofh. The center port towards the front to be exact.

    1. Will doing so lower oil pressure through out the system?

    2. Since it's post filter, do I still need an inline filter?

    Thanks,
    Tony
     

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  2. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    The filtered oil won't need another filter unless you just feel like it Tony. One of my cars has a filter in-line and the other doesn't.
    Be careful when trying to get those hex plugs out, I had to use heat so the "glue" would soften and let me get mine out. When you go back in with a BSPT fitting, I think that one is the one that is kind of at an angle and doesn't go straight in, so don't cross thread it. It won't lower oil pressure throughout the system but make sure you drain it very well.
    Marty
     

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  3. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    Thanks, Marty!! Yes it’s the 90* fitting that goes on the ofh. What do you mean “drain it well”? After installing the fitting on the ofh? I hate these fittings. There’s always shavings to clean up.
     

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  4. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    On the turbo, since you are going to feed it well, you need to make sure the turbo can drain it all also, is what I was getting at.
     

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  5. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    Not sure if this is a 1g or 2g drain but the measures 14mm ID. Should I upgrade? Putting on 68hta V2

    7C76F687-B86A-419C-A719-252106B6C3F4.jpeg
     

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  6. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Does that turbo require a restrictor? If so, then that drain is sufficient. If no restrictor, I would go to at least a 10AN drain, or 12AN (3/4") which is what I run. If you stuff too much oil into the cartridge and it can't get out fast enough, it will slow down the compressor and is bad on it, so make sure you can drain all that it gets fed. I had a kink in my hose one time and it almost stopped the turbo.
    @MorrisonFab has a very nice 3/4" drain kit that I am using. PM Matt and see if they have any on hand and the price. I have been going to do a write up on their drain, as it is a very nice setup that works super on my Holset.
     

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  7. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    Wasn’t sure so I just called FP. No restrictor required and stock drain is sufficient. Thanks for the input, Marty!!
     

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  8. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Sure Tony. That was the best thing to do, call the manufacturer for their recommendation!
     

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  9. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    If I screw the fitting in all the way, I run into a clearance issue so I backed it out about a 1/4 turn. It shouldn’t leak, correct? Not a big fan of the way the line will be routed but won’t know for sure until I get the downpipe on. Manifold and turbo housing are getting coated so can’t really mock it up. Any suggestions??? I’ve seen the square type fittings. Wondering if that’s a better route.

    6E2CB3DC-0A67-41C7-A693-4FA7557A725E.jpeg
     

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  10. ThunderChild

    ThunderChild Supporting VIP

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    Personally I'd use a straight fitting with a 90* hose end. I hate those npt/bpt elbow fittings, always end up in the wrong spot.
    You should have enough room to do a straight fitting with the line you have as well.
     

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  11. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    Think you’re right. The 90 on the line will give a wider range. Thanks, Henry!!
     

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  12. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    I use this on the end of my fitting. You could choose which works best in your spot. I am using the second one. One goes to the turbo feed the other to a remote oil pressure sending unit. :)
    4an tee fittings.png
     

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  13. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    I'm gonna look into getting an oil pressure gauge
     

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  14. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    I got my motor started and had installed a CHEAP electric gauge and the dam threaded stud almost broke off of the sender so I soldered it on good, THEN my son pointed out that it was reading 3psi OMG
    I took a oil pressure gauge out of one of our Camaro's (it is mechanical) and installed it on the end of the 18" 4an line coming off of that tee I use and ran the tubing inside the car for now to verify oil pressure. 73 lbs cold start, 22 lbs idling hot, so I feel good now and a GOOD gauge is coming, but I will use an electric one again, just a brand name, not a no name one.
     

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  15. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    Good thing it was just the gauge.
     

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  16. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Yeah I was kinda worried but new my clearances and no low oil light. I didn't start it again until I put that mechanical "test" gauge on. Made me feel very much more at ease. :thumb:
     

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