anyone have greddy profec B boost controller

[ntensedc4]

my buddy of mine has a greddy profec b boost controller try to read the manual but seems hard as crap his car is running at 15 psi right now pushing at 449hp. but hes been crusing around on 15psi he just want to set it back too 10psi. does anyone have this boost controller and know how you can set the psi down if so this would be a big help. this boost controller is so confusing i know im not getting this controller for my turbo build

 

[dc2GS-R]

The Profec B is one of the simplest boost controllers out there. It has two boost settings. One for hi boost and one for low boost. You just use set % to raise the boost pressure and adjust the gain to perfect the wastegate response to eliminate spikes and what not.

 

[ntensedc4]

thats what i did i set it to low and it was still at 15 psi and i forgot what % percent i set it at low percent and it still ran 15 psi on the boost guage

 

[heykosal]

you should take it to a shop