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Less oil pressure after turbo feed swap

Posted by 503oneG, Nov 19, 2020

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  1. 503oneG

    503oneG Probationary Member

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    So I switched my oil feed from the head to the ofh for my Holset and seem to be running less pressure on my stock gauge. At idle warm it sits at mark on the cluster where ideal pressure would be but seems on the low side. Compared to before it was roughly 3/4 a crossed the gauge. I think I need a real oil pressure gauge. Anyone seen a difference moving their oil feed from the head to the ofh? Thanks, Seth
     
  2. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    You are getting MUCH more oil pressure from the OFH Seth. The head feed is already resticted. And yes a real gauge is always a must for me.
     

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  3. 503oneG

    503oneG Probationary Member

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    I think the turbo is okay, I’m worried about the motor not getting enough now, just weird the oem gauge showed almost 3/4 on the actually gauge. Now it sits on the low end of the 2 “lines” in the gauge itself
     
  4. MattHDSM

    MattHDSM Proven Member

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    If you're not restricting the oil feed off of the OFH, you may be 'relieving' oil pressure through the turbo and your gauge would reflect that. If you still have oil pressure and it increases with rpm, your bearings are probably fine. BUT if you've been thrashing on the motor without out enough oil pressure to provide the necessary oil 'cushion' for the bearings at high load, then it's entirely possible for premature wear to occur.
     
    Last edited: Nov 20, 2020

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  5. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    Idk if you have a 1g or 2g. My 1g fully warmed up sits slightly under the first mark on the stock oil pressure gauge and reads between 16-18 on my aftermarket gauge.
     

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  6. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Same here. 16 psi hot at idle.
     

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  7. Vegas Smith

    Vegas Smith Proven Member

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    You can setup an electronic oil pressure gauge for about $50-60. I used the JEGS cheap digital and it works great. Just remote mount the sender to chassis in front of the driver's side wheel.

    IMG_1035.JPG
     

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  8. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Now quit being a copy cat ROFL ........I run mine that way also, on the end of a braided line.
     

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  9. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    You guys living on the edge without washer fluid reservoir OMG
     

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  10. Vegas Smith

    Vegas Smith Proven Member

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    Visibility while driving is for the weak.
     

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  11. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Nick has his in a different spot than I do. Mine is attached back behind the motor under the intake manifold. I like my washers but that dam reservoir is in the way to get to my pop up headlight linkage that decided it didn't want to stay on anymore as of yesterday on my White 90. :ohdamn:

    Use the force Luke........
     
    Last edited by a moderator: Nov 22, 2020

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  12. 503oneG

    503oneG Probationary Member

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    I ordered an oil pressure gauge so I’ll hook that up. I’m sure it’s fine, I’m a worry wart. Plus the motor is brand new with maybe 5 miles on it
     
  13. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Does your engine still have its balance shafts? When they are deleted, the engine has a bit more oil pressure since it isn't bleeding a bit off on the balance shaft bearings. If the motor has correct clearances and a good pump then you should be just fine. Anxious to see what a real gauge reads and set your mind at ease.
     

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  14. TK's9d2TSi

    TK's9d2TSi Supporting Member

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    Good point Marty! For anyone that’s interested on oil flow

     

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  15. 503oneG

    503oneG Probationary Member

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    I deleted the balance shafts and flipped the bearings. I drove it again today and it sits roughly in the middle of the gauge. Gauge will be here tomorrow
     

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