Overboost - How much is too much?

something you need to ask , technical help here.

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Whats23mm
still on the production line
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Joined: Fri May 24, 2019 10:33 am
Passat model: 06 2.0TDI B6 SE
Location: The land of rain and sheep. And rain.

Overboost - How much is too much?

Post by Whats23mm »

I've been datalogging with VCDS (for reasons I'll get into later) and graphed the results in excel...

Image
turbo.png

Looking at the RPM / Boost (specified and actual), I'm seeing a bit of overboost at around 2000 RPM. Is this normal?

Or is it a sign that the VNT mechanism is sticking or worn (or both)?

I've not logged it when the turbo was totally gummed up, or when I'd 'Mr. Muscled' it (which sorted it right out) a couple of months ago, so I've nothing to compare it to... hence my question.

I'll be stripping and cleaning the turbo properly before long - just not in THIS weather.
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