That's how it works. It's called "boost fooling. " It sends a modified boost signal to the controller, so it gets more boost than stock before it actuates the wastegate.
From
MADS Electronics - Smarty - CaTCHER - FAQ
Q. Has Smarty only CaTCHER softwares on board.
A. No, Smarty offers SW# 0 that provides about HALF the power of a stock software.
Emissions... . Ehm...
SW# 1 is a Fuel Saver software. With todays fuel prices... Testing is still in progress but so far
it looks VERY promising. MPG gains are almost too good to be true. We will report about the
MPG gains as soon as more hard test data flows in. SW# 2 deals only with fuel and boost. SW
# 3 is fuel, boost, and timing. The remaining levels can be considered at full title CaTCHERs.
Q. Does Smarty do the boost fooling function?
A. Yes, all the the softwares in Smarty ;have
modified boost tables in them in order to allow for
higher boost without defuelling. ( Except ;SW # 0 and of course Stock ) No external boost
fooler is required!