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Secondary turbo help ? Legacy RSB weird noise


Corleone

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Hey guys, just want to get a second opinion but yeah when my secondary turbo is supposed to kick in I hear an odd sound ? It almost sounds like an external wastegate opening through a screamer pipe and the boost drops to about 3 psi ? Not blowing any smoke out the exhaust but I do smell a kinda burning oil smell after I turn the car off. Is the secondary buggered ? I downgraded both turbos to standard a couple months back and it only just started doing this. Thanks in advance.

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It might be? It might not be too

Sounds like it might be, if the secondary isn't making boost then the whole lot will fall over - the primary starts to just blow boost back out the secondary inlet

Might also be the secondary BOV being stuck open too. Or maybe the intercooler valve being stuck shut? Though that'd be a stretch since it is spring loaded to open

You can check sort of by locking it in parallel, worst case you can check if the turbo is in one piece to a degree by unbolting the downpipe and inlet pipe and making sure it hasn't snapped a shaft, that seems to be how they die when they do die

I'm taking it that it worked fine then just didn't (like nothing got played with) and it drives fine in primary only mode?

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It still boosts just makes that weird noise and the boost stops, it's quite strange because both turbos seemed to spool fine I had a leaking up pipe before causing no boost, but after that it drove fine I haven't been driving it for the past couple weeks as I got a new car. How do I get it to run in parallel ? Cheers

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