Braided turbo oil feed lines

Discussion in 'Non Technical' started by Anti, May 26, 2013.

  1. zedboy

    zedboy Active Member

    Eric is saying you use the OEM lines which already have the restrictors built into them.

    Wish I knew this was ok, would have much preferred the OEM hardlines. Wouldn't have mucked around with the oil pressure sender etc.

  2. Claymen

    Claymen Active Member

    Digging up an older thread, but this wouldn't happen to be the same kit that I got would it? Does that mean mine doesn't have a restrictor in it and should get one made up?
  3. rob260

    rob260 Administrator Staff Member

    Man to be honest I'm not 100% sure what John did with those kits. Probs best to give him a call today and see if he can remember.
  4. Claymen

    Claymen Active Member

    Yer I sent details through last night. Will see if I have time today at work to give them a call.
  5. Z32 TT

    Z32 TT Active Member

    hard lines are better. braided lines look hectic but :D

    blackbeast has the right idea, love all the hard lines he has.
  6. Claymen

    Claymen Active Member

    Ended up just getting new aeroflow fittings today. They actually supply a restrictor for garrett turbo's however it doesn't fit in the fitting that came with the kit. Fun and games.

    All good though, picked up new fittings which accept the restrictor and now have all the bits to mount it all up. Also the fitting that went into the block itself according to enzed was the wrong thread type, BSP vs NPT or whichever way around it was.

    Ah well, onwards to turbo heaven!
  7. ryzan

    ryzan Black Mesa? Fat chance...

    Thread dig.

    So is there any way to fit a restrictor in line with the stock oil hard lines? I'd much rather not run braided lines unless there's no alternative.
  8. Shane001

    Shane001 Well-Known Member

    Pretty sure the stock oil lines would already be 'restricted'.
  9. ryzan

    ryzan Black Mesa? Fat chance...

    Yeah but if you read through the thread there's some debate as to whether or not the journal bearing restriction is sufficient for bb turbos.
  10. Shane001

    Shane001 Well-Known Member

    My bad, I thought stock TT turbos were ball bearing? If not then you're right it won't be enough, journal need more oil than BB.
  11. antman

    antman Member

    I fitted the Z1 GT675RS BB turbos and there are restrictors in the oil line at the turbo side, there was also a note to say that do not use the OEM oil banjo bolt with the big letter "K" on it as it has the oil restrictor built in for the OEM turbos. I did not have any other banjo bolt so I drilled out the "K" banjo bolt with a 6mm drill and now have full flow to the BB turbo oil restrictors. Been like that for ages. Hope this helps.
  12. Chad_

    Chad_ Well-Known Member

    hrmm didnt know about this restrictor requirement can someone just confirm for me that my s15 t28 bb turbos have them already

    (note: pic is just from google but has this exact thing)

  13. Claymen

    Claymen Active Member

    Hey mate, the restrictor should look something like this.


    Those are drop in ones that go into the end of the fitting going into the turbo.
  14. Fists

    Fists Well-Known Member

  15. Claymen

    Claymen Active Member

    Are they seriously charging $15 for one! Wow.

    I got a pack of 10 for less than $12 in Perth.

    If you have an Aeroflow supplier near you, AF399-04 is the code you want! And if you need the adapter to convert it to -4AN you want AF341-04 which should run you abt $14/each. The little restrictor sits directly in the end of the AN fitting.

    Oh and if you want it for -3AN then it's AF399-03.

    Catalog is here
  16. Madcow

    Madcow Active Member

    Look into getting restrictors built into the bolt on the block. Much easier if you want to run hard lines
  17. ryzan

    ryzan Black Mesa? Fat chance...

    If I did that though I wouldn't be able to run the factory pressure sensor then, not a big deal I know but it's something that would bother me a little.
  18. Fists

    Fists Well-Known Member

    There's a spare tap for the sensor in the filter tree that many people use when they get the American braided lines.
    Only real solution I can think of without redesigning the system would be to weld up the standard restriction points and retap them to 1mm, I would assume that welding to brass will be tricky. Other than that maybe shorten the hardlines and fit restrictors before them
  19. timothyds

    timothyds Member

    You can buy a -4 1mm fitting that screws into the oil port in the turbo then screw the oem hard line into it. That's what I will be running on mine.
  20. rob260

    rob260 Administrator Staff Member

    Reading through this thread there's a fair bit of questionable information...

    There are no AN threads or tapers in the turbo or in the factory oil feed assembly to which you could add an additional AN fitting or restrictor designed for AN fittings.

    If you are using ball bearing turbos use a suitable braided hose with a suitable restrictor. If it is constructed correctly there will be no problems. The hose I use for example in constructing the lines I sell is rated for temperatures in excess of 250 degrees celsius. If your oil gets anywhere near hot enough to melt the hose you already have more significant problems.

    If you are using stanard bearing turbos use the factory steel tube. If the tube is not available or unsuitable for use (not uncommon after 30 years) use an appropriate braided equivalent. See comments above.

    There is no reason not use the standard banjo bolt and junction with aftermarket turbos. You could make an argument to replace it with a more simple fitting but given the lack of fittings available in stainless steel with the correct threads (emphasis on correct) you could also make an argument to leave well alone what isn't broken...

    Have fun.
    Last edited: Jun 22, 2022
    ryzan likes this.

Share This Page