Not so much of a problem however the settings Revo say to use without a uprated fuel internals on the pump should be set to 9. Why on earth was it set to 7 ? Maybe to advance the timing more to get more power... I spotted a problem with the Fuel when i brought Vag com and did some data-logging. It was only on the fuel that the pump could not keep up with the requested value. I also had a dip mid range on the graph which i think was related to the fuel problem.
It be good to know what settings you on though, i know every car is different but just what setting is your Fuel is set to
In theory if the car is asking for a requested amount of fuel and your boosting at full wot, and the fuel pump cant produce it then surely its gonna be bad. i.e running lean.. especially it was on boost it was happening.