Hello all,

I just installed a Hallman mbc pro on my jdm evo 7,
the car was running stock boost before
after installing the mbc and having it turned all the way down just to test,
the car is making less boost and is extremely slow, it builds like .5 bar and then it slowly climbs to just under 1 bar.

any ideas as to why it is lower than stock now?

thanks

 

Because your wastegate is weak.

 

Can you post pictures of how you installed it?

 

Turned boost all the way down (turned the hallman counterclockwise), or turn the hallman “down” to turn boost up (turned the hallman clockwise)?

Is it’s the hallman pro, or standard?

Did you hook the hallman up to the stock wastegate solenoid lines, or did you run new lines?