Ok - as far as I understand - all a GiPro really does is tell the ECM you're in a different gear to that you're really in as well as tell you which gear you're really in (if it's calibrated correctly naturally). Correct?.
If so then surely this is how the ECM knows which maps to use. If so then surely it's altering the secondaries as well - I.E in modes 3&4 it opens the secondaries to 100% anyway, as the ECM is convinced it's in 4th all the time.
I've tried modes 1 and 2 - 2 might just be useful in pouring rain. I'm using 4 mostly. btw mine remembers which mode it's in if it loses power. Don't ask
All the baby now really needs is to BREATHE. Give me time - I've only had it 2 weeks. Mapping - not sure if I'll dyno remap or PCV!. Remapping sounds more fun somehow.