stock ms3 boost spike??

[nig3]

after installing my boost gauge and hitting 500miles i started to actually drive the car harder and get into full boost. this is what i noticed and this a bone stock MS3 with only 2nd cat deleted. boost hits 15-16 in 1st and 2nd then tapers down to around 12psi to redline. but everytime i hit 3rd gear the boost spikes to 20psi+ the tapers down to 15-16psi to redline. Is this boost spike normal for these cars?????

 

[Sierra117]

From reading these forums...that trend seems to be pretty common.

 

[clos561]

my boost peak is 19.5 psi spieks then settles at 16

 

[Ryz]

Peaks at around 22.5 then settles down.