hey bud, i have just installed a jam fcd, fpr, and wideband to my car, so far my fuel pressure vac off, is set to 2.7 bar, i still have to take it on a run yet, to see what the wideband reads, but before that it was set to 2.4 bar vac off, and wideband read on full throttle 12.9, which is still to lean for this, i have been speaking to adam b and he guided me through everything, he said on full throttle, mine should read inbetween 11,6-12.2 which is good for me, but im only running .85 bar boost, so yours may be slighty different as your want to run a bar of boost, but aslong as you have a wideband, and it reads that the fueling is fine there shouldnt be a problem