hallman pro rx mbc

[madboost28]

I have installed the hallman pro rx mbc with light spring. The other night on the way home from work it hit 18psi and held 17, exactly where i want it. Then the next day it hit 19psi and held between 17-18. I didnt adjust anything. I didnt want 19-20 so i turned it down half turn and its now hitting 14psi. I wanted more than that so i turned it back up ti where it was when it was hitting 18psi and its still only getting 14psi. The mbc is hooked up exactly how Aaron from jscspeed has it hooked up, and nothing is loose i have checked many times. My real question is should i put the heavy spring in? Any help would be great?(boom02)

 

[stars.eg6]

idk if it matters but when its 108+ degrees over here i get about 16-17 psi and when the temps drop to about 80-90 i get about 18-20 at the same setting.
were the temps diff when you noticed this?

 

[madboost28]

whats wierd is that when it was 18psi and holding at 17psi it was 58 degrees out, and when it was hitting 19-20psi it was 87 out. thats what has me thinking wtf lol. the good thing is now for the past several drives it holds steady at 14.5 psi. im hoping that it was just some wierd fluke and im gonna open it little at a time till i get 17 steady

 

[madboost28]

im pretty sure i figured out whats going on. i have both the mbc and the boost gauge hooked up to the same line off the bov, and im thinking thats why im getting the 19-20psi readings once in a while. the car doesnt get any kind of cut when i hit 19-20psi for several seconds, so thats another reason why i think its because of having both hooked up to the same line. does anybody have an idea what other line i can hook the mbc or gauge into? any help would be great!!

 

[stars.eg6]

i have my mbc and boost gauge hooked up to the bov line and it runs just fine.