Boost is low for a Revo'd car, but too high for stock - says it's been mapped.
Can depends on the rolling road, how many runs it had, how big the fans, does the operator know what they're doing. ECU is load based, so you need to load up the car for it to make power.
Try an ECU reset, and get it vag-com'd. It would be worth ringing a Revo dealer and talking to them, see if they will take a look for you, as there is likely to be summat wrong!
Who said 230 was fine for a Revo/remapped car? Pfft.
Stock fuel will be fine, also.