i just installed a hallman mbc in place of my greddy ebc. I feel my boost gauge is WAY off. I dont want to be boosting too much. I am tuned for 21 psi. How many full turns on the hallman should get me in the ball park of 19-21 psi *peak boost*?

 

Bump for answer

 

Some one....please?

 

It would be hard to say exactly. Best bet is to get a guage that works and set it properly. Turn it down for now to be safe.

 

This man is a genius

 

^^^ its hard to tell exactly how much to turn it, Its more like trial and error. I turn it, take the car for a spin and check the gauge, go home and adjust.. repeat.. lol