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Blown turbo

Discussion in 'Diesel forum' started by A3-frankie, Nov 21, 2006.

  1. A3-frankie
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    A3-frankie Member

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    [Nov 21, 2006]
    My friends A3 tdi 130 sport has blown a turbo. He'd bought one of those tuning boxes second hand, had it fitted for an hour or so and blew the turbo on the motorway. He was giving it some stick but ive never heard of this before even with remaps that produce more power than a tuning box.

    does anybody have any theorys as to why the turbo gave up, maybe it was a bit dodgy anyway. itd only done 65k though.

    Thanks.
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  3. peteA3tdi
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    peteA3tdi Member

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    [Nov 22, 2006]
    are you sure its blown and not just gone into limp mode?
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  4. A3-frankie
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    A3-frankie Member

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    [Nov 22, 2006]
    ive not seen his car yet but he said it was making a right old noise when he tried to boost and a garage confirmed it was gone.
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  5. loftgroover
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    loftgroover Member

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    [Nov 22, 2006]
    The tuning boxes make the car produce more boost. To produce more boost on a diesel the box puts in more fuel, in a diesel this elevates the exhast gas temp a LOT. The higher EGT can do one of two things.

    1. Overheat the vane and turbine assembly usually leading to bearing damage and pretty much instant failure.

    2. The high boost pressure can wipe out the trust bearing in the turbo causing failure.

    I was an application engineer for garrett for 3 years and the ammount of turbos i saw damaged after people fitted tuning boxes was horrific.

    Plus, you can tell very quickly what caused it if you examine the turbo, so no warranty.

    Im sorry for your mate but many of these so called "specialists" havent a clue what they are doing, they just dump more fuel into the engine, causing the damage i outlined above and the result is very p1ssed of customers...
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  6. A3-frankie
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    A3-frankie Member

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    [Nov 26, 2006]
    ahhhh, interesting. i shall pass the info on.

    So is the lesson to be learnt that a tuning box CAN mean disaster and a reputable company should be used for a remap....

    If you had a remap done by somebody who didnt really know their stuff the same thing could happen?

    cheers.
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  7. loftgroover
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    loftgroover Member

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    [Nov 26, 2006]
    Its the old saying. You dont get something for nothing!

    And yes, you can cause some serious problems with re-maps.

    The problem i think is that most of the re-map guys have electronic engineering backgrounds, great for burning new maps on ECU EEPROMS but not very useful if they dont know what altering fuel timing/ air/fuel ratio does to all the mehanical parts....
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