i have the portfueler. i noticed you said that you already have 450cc injectors. those arent from a 4g63t are they because the PF wont work with those low imp injectors.

i found the install relatively painless but everyone was right when they said that the base map was rich

my zeitronix read 10.5:1 at 15 psi

the software is easy to use but it helps to have a datalogger that records boost also

with my zeitronix i log boost, rpms, AF

then find that corresponding cell and add or subtract fuel