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Thread: Golf R Mk7.5 - Blown turbo after 2 weeks of stage 2

  1. #1
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    Golf R Mk7.5 - Blown turbo after 2 weeks of stage 2

    Car: 2019 MY20 Golf R Mk7.5 - ~19,000kms on odo
    Background: Car is running Giac Stage 2 ECU & TCU with the below bolt ons:
    - RacingLine R600 full intake, piping, elbows, etc
    - IE dump pipe
    - APR coil pack
    - RS7 plugs
    - IE intercooler

    All's been up and good with it up until today 😳. Did a little rolling pull while driving today and POOOF tonnes of white smoke in my rearview mirror with complete power loss.

    Pulled over had a look around the engine bay, nothing out of the ordinary. I tried to start it and the motor sounds fine (no knocking, etc) but stalls almost straight away with a SAFE message displayed. Car deffo knows it's ****ed. We also saw some white smoke also coming from the turbo.

    No messages displayed when doing a scan with the OBD11 dongle I had with me.

    It's deffo looking like a blown turbo so just hoping there's no damage to anything else. Coolant & Oil levels were checked prior to the drive.

    Cars currently in a holding yard and getting towed to the tuners tomorrow for a proper us.

    I know there's been issues with the turbos on older year model R's but thought mine would have been fine. Everyone I've spoken also seems to be surprised that the turbo went. IDK if I just had a defective turbo from factory or I have bad luck .

    Either way, I got the car tuned knowing it'll void warranty and that there was a possibility of ****in **** up. Hopefully a bigger/stronger turbo next.

    THIS IS ALL BASED ON THE TURBO ACTUALLY BEING BLOWN. I could be a dud and something else could be wrong.

    Anyone heard similar things or had similar experiences?
    Last edited by clarcus; 12-12-2021 at 08:42 PM.

  2. #2
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    IS38s are quite a weak/bad design turbo. Despite many revisions, the main weaknesses still exist.

    If its blown you may as well get the new Garrett Powermax Stage 1 turbo which is an upgrade over the IS38.
    2015 Mk7 GTI Performance
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  3. #3
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    Quote Originally Posted by Lucas_R View Post
    IS38s are quite a weak/bad design turbo. Despite many revisions, the main weaknesses still exist.

    If its blown you may as well get the new Garrett Powermax Stage 1 turbo which is an upgrade over the IS38.
    Yep, tuner confirmed she's blown. Sussing out the options now. Thanks for your input mate

  4. #4
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    I guess the issue is if you decide to move away from the IS38 then you will have to get the car tuned to suit either the Garrett I mentioned or a hybrid (modified) IS38. GIAC used to be pretty popular in Australia 5-10years ago but you dont hear of them much these days, so not sure if they offer tunes to suit upgraded turbo's? If not, you may need to move to a different tuning company or go with a custom tune.
    2015 Mk7 GTI Performance
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  5. #5
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    Quote Originally Posted by Lucas_R View Post
    I guess the issue is if you decide to move away from the IS38 then you will have to get the car tuned to suit either the Garrett I mentioned or a hybrid (modified) IS38. GIAC used to be pretty popular in Australia 5-10years ago but you dont hear of them much these days, so not sure if they offer tunes to suit upgraded turbo's? If not, you may need to move to a different tuning company or go with a custom tune.
    Yeah, the tuner confirmed that Giac don't have a suitable tune for Garret we're currently looking at.. Possibly going down the route of a custom tune. Nothing to over the top as I still want reliability and don't want to be upgrading a bunch of other stuff.

    So many choices!

  6. #6
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    go for 450+hp
    2015 GOLF R. 98 OCTANE FUEL & 2 BOTTLES OF OCTANE BOOSTER ON EVERY TANK.

  7. #7
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    If you want to keep things as simple as possible and stick with a normal IS38 turbo (no changes to your software) then it seems the HPA OEM+ turbo is the best option. It has a revised bearing system and they have also addressed most of the the other common failure points on the IS38 turbo. HPA Motorsports OEM+ IS38 Turbo Upgrade – AutoInstruct
    Last edited by Lucas_R; 12-01-2022 at 09:35 AM.
    2015 Mk7 GTI Performance
    2015 Audi SQ5 bi-turbo V6 TDI family hauler

  8. #8
    Sorry to hear about the turbo, this is why i chose to run the HPA IS38 oem + turbo which cost me roughly $2500 shipped. I have a dyno tune running 250kw and it runs nicley. The standard is38 is known to have issue with aggressive stage 2 tunes.
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  9. #9
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    It is unfortunately the most normal thing that an IS38 stock turbo blows (stage 2 | 350+ whp).
    Options:
    LM440 IS38 Hybrid
    Garrett Powermax 1
    Lots of other manufacturers of IS38 Hybrids (DBV, TPC, Tom., etc.)

    Stage 3 (ECU & DSG)

  10. #10

    Sorry to here about the blown turbo.

    Shameless plug ,I have a Littco L500 turbo if your interested , looking at $1K for it . It's been on my car for 2 years ,my R was tuned by Underground Performance . I've recently changed to a Turbo Technic's V5 to scratch an itch I've always had for the V5 .

    Cheers
    Mal

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