Hi guys

Got a lupo 1.4TDI with a JDD gearbox and darkside g60 flywheel and clutch kit capable of holding 410nm
I also made a custom intake manifold with a big water to air charge cooler from a TFSI, and full 2.5" pretty much straight through exhaust. Turbo is GTD1752vrk from x3 f25 2.0xd converted to vacuum. Stock injectors for now..

Still working on cosmetics, but as Im getting closer to finishing I need a tune to run it. Heres my attempt at it:

I used both winols and VAGEDCSuite to make it and learnhowtotune guide.. I wont lie Im not sure what to do with my N75 map and how should I route the vacuum going to the N75 valve as before this it used to be controlled by boost to stock wastegated turbo?

I can post some pictures of the setup if anybody wants them

Let me know if I messed something up.. :angel:

kventis wrote:Hi guys

Got a lupo 1.4TDI with a JDD gearbox and darkside g60 flywheel and clutch kit capable of holding 410nm
I also made a custom intake manifold with a big water to air charge cooler from a TFSI, and full 2.5" pretty much straight through exhaust. Turbo is GTD1752vrk from x3 f25 2.0xd converted to vacuum. Stock injectors for now..

Still working on cosmetics, but as Im getting closer to finishing I need a tune to run it. Heres my attempt at it:

I used both winols and VAGEDCSuite to make it and learnhowtotune guide.. I wont lie Im not sure what to do with my N75 map and how should I route the vacuum going to the N75 valve as before this it used to be controlled by boost to stock wastegated turbo?

I can post some pictures of the setup if anybody wants them

Let me know if I messed something up.. :angel:

Haven’t opened the file because I’m writing from my phone, but I’ll suspect that the reason no one answered you is because if you’re car is wastegate from factory, it’s a HUGE mess to convert to a VNT turbo as controlling a wastegate has nothing to do with controlling a turbo geometry, for example, with a VNT turbo connected to the stock wastegate vacuum system, whenever you floor it, the car will mindlessly pull full vacuum to keep the wastegate shut, and that’s a woopsy and might surge your turbo like crazy, so you’ll either have to hope for someone already finding that “switch” in coding for your specific ecu software version or you’ll have to get a standalone VNT controller.

As for tuning the N75 when it’s properly told that it’s controlling a VNT, it’s a matter of setting your boost request map and then logging the hell out of your pulls and seeing if either the car is under boosting compared to boost request or if it’s overbooosting , and logic there is pretty straightforward, either open close more the geometry on that specific RPM range for that specific injection quantity, or open more geometry respectively.
Once your actual boost follows your requested boost to around a +/- 50mBar difference you’ll be done with it.

Btw nice project on paper, loved it, keep it up.