Problems with Hallman Pro MBC

**B-Man** · 07-14-2011, 09:35 PM

Purchased a Hallman Pro MBC from STM during their Xmas sale last year. Installed it in March when the weather was warming up. It ran great for awhile but slowly I kept getting less and less boost at the same setting.

Ok, I figure springs are breaking in. I kept turning it (in the direction labeled on the controller for more boost) and I don't get any more boost. NG comes around and turns out I'm only running 12psi. By the time I leave NG I'm running 10psi and have been giving it a half a turn (maybe a little more) when I leave for work and on my way back. So that's 2.5 turns a week and no change.

Tonight, I just unplugged my pressure source to my wastegate and ran it while closely monitoring my boost. Easily makes it to 16psi.

Is there a stop when it's all the way in? Is my hallman bad already? Is there any warranty on these?

**IPD** · 07-14-2011, 10:29 PM

sure you don't have a boost leak?

**B-Man** · 07-14-2011, 10:42 PM

I haven't check it in awhile, but that wouldn't make any sense to me since it'll make all the boost you want with it disconnected.

**sublime_whatigo** · 07-15-2011, 01:18 PM

Pull it apart, assuming its still a ball and spring. Stretch it a touch and clean it out good.

**B-Man** · 07-15-2011, 02:34 PM

Top just threads off like you'd expect?

**i3igpete** · 07-15-2011, 02:57 PM

not the knob side, but the nipple side. don't tighten it too much when you put it back together or you'll rip the O-ring, hallman actually recommends using your hands to tighten instead of a wrench.

**B-Man** · 07-15-2011, 03:31 PM

They say on their website to just send it in if there's any problems, so I may just contact them and do it while the car is down....again

**i3igpete** · 07-15-2011, 03:39 PM

There's really not much else that can go wrong and cause your issues, other than the spring getting grime on it and staying partially compressed, or the o-ring on the inlet side getting ripped.