Sorry for the lack of updates guys! I got a bit burned out after spending a couple months banging my head against the wall trying to fix the couple issues it had (while still needing to drive it everyday). I ended up buying a Q5 and the allroad has just been sitting on the driveway waiting for me to feel like working on it again.

I had ran into a few problems that I had to hackishly solve, and despite that it was running very good (and just on a base tune). No matter what I did I could not get the car to run with a MAF. I tried Bosch, Hitachi, HPX in both draw-through and blow-through but it would barely idle and die everytime I let off the gas. Normally that would point to a boost/vac leak but there were none to be found other than a slight leak through the TiAL wastegates (normal according to TiAL, and if that had been the problem blow-through HPX would have fixed it). I ended up coding out the MAF which I hated doing but I needed to be able to drive it... Also strangely with the 18 psi springs in my TiAL wastegates, I had a base boost pressure of 38 psi (No N75 duty cycle, I tried multiple N75s... with no N75 base boost dropped to 31 psi).

I only took it to about 4000 rpm (since at 30+ psi the one fuel pump I had in there wasn't enough especially with the stock lines), but the GTX3576R spooled amazingly fast. In hindsight I should've went with the 1.01 AR housing instead of the 0.83 because I did get some part throttle surge.

A few logs here that I dug up; Here's how quickly this thing spooled. 30 psi before 3500 rpm, this was with no N75 installed so just wastegate pressure.


Compared to my old SRM K24s.


It felt very quick, despite having virtually no timing (Lots of power still on the table)


In December I had to do emissions and could not get it to pass to save my life... For some reason it would not start the SAI test. It passed everything else and I had it properly coded to pass SAI if I could only get it to start the test.