William's car was modded with exhaust, intercooler, etc and it was running bang on 7psi as well. He had no boost solenoid either, so that may well be it.
i just got a boost guage installed and noticed depending wat gear i am going to the boost is higher, say 2nd-3rd gear reads about 5psi but 3rd to second will go up to about 8psi. Does that sound right ???? I have a mbc to install also
First and second won't acheive as high boost levels as 3rd and 4th, you need load to make full boost. Sure, you may get close to a preset higher than stock boost level in 1 & 2 but it won't hold as well.