well im pretty sure it might be the higher altitude. Well i tried the wastegate arm tighten seem to help a bit. Only off by 1.5psi or so. So if it gets better later on with the ecu learning then it should be good. I will keep everyone posted.
ok took the car out for a drive today after putting about 100kms on the car and i am now hitting target boost of 13psi. I see occasional spikes to 14.2psi but im not to worried about it. Im guessing it was from tightening the WG arm 1.5 turns. So yea the ecu had to learn for a couple kms to get the target boost. Im very pleased with it now.