[550bye]

Originally Posted by m5james

Bump for updates on the N63 turbos to see how they're holding up.

I have not had mine as long as the original post date, but November 2020 I had Turbo Labs rebuild my turbos for my 550i non TU, basically a match build to the videos above. From what Austin at TLOA told me is that this was the max build for the stock housing, upgraded 50mm compressor+turbine wheels, wastegate repair and then I added TurboSmart DV's. From what I read they are the equivalent of the PS2 or +, but I have no physical data or comparison charts to prove that or argue with anyone about it, i can only relay my experience and what I have learned. I can say they are still in great shape and they perform great prior to all my mods but especially well with the mods and I could not be any happier!

I don't notice massive turbo lag and they hold boost great. I did notice a little lag (basically just intake and JB4) before I added the majority of my boltons plus a flash. I run them about 21-24 psi, with the 3.5 TMAPs I believe I can run them upwards of 31 psi but the most I have seen in any log so far is 28. I'm in the process of dialing in my car now and plan to take it up as far as I can on a custom map before I start having major fueling issues but for daily I'll keep it at 21-24.

I would recommend this build to everyone considering upgrading, again I don't have charts or numbers to compare but if and when I do it again on future cars I will go with TLOA over PS2 or VTT. I say pull the trigger!