I thought about doing that and reached out to TPC. They wanted more to convert the turbo to the BB version than I paid for the JB version. Seems they also increased the size of the compressor wheel when going to the V2 so it's not just a simple CHRA swap.
The turbo I'm currently running has a BB CHRA...there are many factors at play that affect how quickly the turbo spools. The Vortex and the XL have no issue with spool despite being a journal bearing design.
A little background...I went from JB4 to Cobb to Eurodyne. I went from running 93 to e30 on Cobb with 5150, to 93/e60 with Mabo on while I was running is20. Went from the is20 to the mabotech is38 hybrid running 93 and meth. Put down 440whp/400wtq on that setup. I ended up pulling the meth because:
- I hated constantly watching the failsafe gauge because I was afraid that the pump might take a dump in the middle of a pull.
- The AEM meth pump took a dump.
- Running preturbo meth eroded my compressor wheel
Currently running e20 with the hybrid on stock fueling. Hitting 28psi at roughly 6000 rpm in 3rd (tuner regulated taper to 28). Seems I've reached the limit of the stock fueling (so I've been told).
If I were to do it all over again, I would have stuck with Cobb, and gone with EQT. I would have chosen their standard vortex and upgraded my LPFP and gone MPI at the same time. Heck, I might have been happy sticking with the is20 on their e85 tune.
And I'll leave you with this...I was able to get my TPC20 for $400; brand new never installed, including ceramic coated turbine housing, DV and waste gate actuator.