thanks for you help mate
just to point you in the right direction with the fuel cut stuff
more boost = more air flow, if you max out the AFM or what the ecu sees as acceptable it will put you into the R&R section of the map (rich and retard)
if you go high enough you will hit fuel cut, this is still done by the ecu and it just turns the injectors off
the fuel regulator just keeps the pressure difference between the fuel rail and plenum the same (add 7psi of boost to the plenum, the regulator adds 7psi to the fuel rail)
mines ecu's are also tuned for jap fuels (about 100 ron normally), they are also uber rich but you get the goodness of speed limiter removed and usually good for much more boost
they are also normally done to individual cars so its pretty hit and miss, you obviously got one for a car with similar mods to yours
thanks for the info, don't take my rant the wrong way, i just hate seeing wrong infos on the interwebs
Cheers, Tom