Audi A6 C6 2.0tdi BRE with GTB1756VK

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Audi A6 C6 2.0tdi BRE with GTB1756VK

Postby mfg » Sat Jan 07, 2023 11:48 pm

I have an Audi A6 C6 2.0tdi BRE with stage 1 and i've mounted a GTB1756VK on it.Can somebody give me some hints to tune n75 please? Will i be able to fix those spikes only by closing a bit the vanes in n75 map or i need to touch PID?
i have atached a log with 3rd and 4th gear.
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Re: Audi A6 C6 2.0tdi BRE with GTB1756VK

Postby zapdus » Mon Jan 09, 2023 6:25 am


I think you are losing power with this tune
Little fuel, little boost and duration decalibrated

I have made audi a3 2.0 TDI BKD running on 2 bar boost with that turbo

I dont see anything bad on log, it is doing the boost you request
Also turbo map not well done

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Re: Audi A6 C6 2.0tdi BRE with GTB1756VK

Postby ceecee » Mon Jan 09, 2023 5:38 pm

In 3rd gear seems overboost 2121-2331rpm, PID takes control but charging is low (2284mb).
In 4th gear charging is slow 1911-2772rpm (2203-2295mb), PID doesn't help.
Check these N75 % with N75 maps and fix, if not working then change PID.

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