Most factory stock GM turbo actuators will only get between 4-6 PSi controlled by the wastegate spring.
Some have threaded wastegate actuator rods which will allow you to change the boost ,anywheres from 2-4 psi up to 8-10 PSi , give or take a few psi.
The tighter/shorter you make the threaded rod the more boost,but if you go too tight,,the wastegate valve will only open so far, (meaning less)& will give you poor boost control.
So if if kyull67 is only controlling boost around this low PSI, then that is why it is low. Using only the wastegate spring pressure. No electronic boost controllers.
I use this one on my Syclone
http://www.aemelectronics.com/tru-boost-boost-controller-gauge-757 & it makes the turbo spool up faster because it will only open the wastegate @ the last possible second.
Works great! Hope that makes sense.
Also, IIRC, my Syclones factory wastegate actuator opens @ 6 PSI,why it goes to 14.7 psi stock, is because it has an electronic solenoid that is controlled by the factory ECU.
MBHD
