Wow, Frank turbos haha.  You say that to most people nowadays, they have no idea what you're taking about  /ubbthreads/images/graemlins/rofl.gif.  I've run a frank JR 19c, frank 1 TD06 20g (belive it was a 46mm compressor) and a frank 5.  All were awesome turbos being MHI turbos.  I would run consistant 12.2's in my 99 GSX with the frank 1 and 12.5's with the frank JR.  The frank 1 is still floating around on a friend's car 10yrs and over 100k miles later.  I belive the frank 2 runs a bit bigger turbine wheel than the frank 1.  You should be able to run 18-30PSI with no problems with that frank 2.  I ran my frank 1 at 25psi at the track.