the set up is a straight t3 on an ls and in first it gets about 12 psi, 2nd 15 psi, 3rd 15-18 psi ? and 4th 18 psi...im running a deltagate with the vacuum source to the compressor outlet with a manual boost controller...i need more boost in the lower gears because the car runs too rich when i cant get 18 psi because of the cheapy afc/450cc injector set up...

 

its that bc and colder temps, someone else was having this issue, just starting happpening when it got cold