okay i have apr stage 1, runnin about 16-18 boost nosrmally, 2 days in a row now though, when the car cools down over night, i start driving and only get 10-12 psi until the car's been running for 30 mins, then it's back to normal. I'm gonna go ahead and assume it's some wierd problem with the manual boost controller being in-line with the n75, but i dunno so that's why i'm posting, thanks