its the dump causing the fuel cut. now that the weather has cooled down, the MAF is easily maxed out at higher boost levels. the dump has caused spike issues ever since CitizenPro put it on his car and with the boost level the UC boost controller is set at, he gets a higher spike. not having the UC get rid of the fuel cut is double edged; it keeps a safegaurd in place, but doesn't let you have any fun in the cold.
its not that the Unichip can't keep up, its the stock computer still having fuel cut control.