fromWRXtoEVO

iTrader: (18)

I am sure it is a installation error. Check your boost/vacuum lines, make sure the BOV line is not pinched or twisted.

Make sure you connect the MBC the correct way, I had mistakenly installed MBC the wrong way many times, there are soo many MBC in the market that it is crazy, per instance the TurboXS incresases boost by rotating the screw the opposite direction of everyone elses. Bottom line, just double check the lines.

Carlos

Turbo-Evo2346

alright thanks guys I appreciate it

Evotech8

iTrader: (4)

You might want to try taking it apart and cleaning it. You can unscrew the bottom barb fitting by hand. Make sure the ball and spring are clean and seating properly.

dan628

iTrader: (5)

Make sure you use the turbo outlet as the source and NOT the t-method to the BOV like many people mistakably do.

Soon2BEVO

iTrader: (41)

You can use either, it doesnt matter. Ive been using the BOV line as source with my Hallman MBC for 40k miles and it works fine. Many many other people do as well, without problems.

taenaive

iTrader: (20)

For hallman MBC you must use

Heavy spring!
Heavy Spring!
Heavy Spring!

for stock waste gate.

Soon2BEVO

iTrader: (41)

I dont get this heavy spring stuff. I purchased my Hallman right off boostcontrollers.com and installed it right there. I never had to touch springs?

dan628

iTrader: (5)

You can run it that way, but switch to the turbo outlet for the source and you'll see what I mean.. I stupidly installed mine the first time using the BOV method, and had a lot of weird problems (suring, bucking, etc.) , now when I use the turbo as the source it works perfect...

Soon2BEVO

iTrader: (41)

Hm, thats weird, Ive always used it, my boost is perfect. I guess maybe he could try that though as a possible remedy

dubbleugly01

iTrader: (24)

Since you are trying to control boost pressure at the manifold, the manifold is your best reference point for the Hallman and controlling boost. Taking your source of boost pressure at the turbo is going to cause a greater variablility in your control. For instance, air flow increases as hp increases, and dp increases accordingly. As the dp between the turbo and the manifold is in a constant state of flux, so will your boost control at the manifold. Manifold pressure and turbo pressure will not be the same nor will the dp between the two, and if you try to control off turbo pressure, you WILL see more boost taper and variablility than if you tap the manifold (or the line to the BOV for instance).

dan628

iTrader: (5)

This just goes to show, you can't always believe what you read on the internet.... Even hallman's instructions say to use the turbo as the source. I get very little taper if any at all.. I hold 20 PSI damn near all the way to redline... I get full boost between 3000 and 3500 rpm. I guess every car reacts differently.

This is straight off hallman's website, scroll all the way down and you see how they say to install it, right off the turbo outlet!

http://www.hallmanboostcontroller.com/howto.html

Stew

iTrader: (11)

Go with idea # B.

taenaive

iTrader: (20)

Hallman pro RX comes with 2 springs, and you have to put the heavy spring in. one installed on Pro RX is the light spring and it is for hondas. Regular Hallman comes with the Heavy springs but sometimes they ship out with light spring for honda like cars. and the light spring only holds till 14~15 psi max.

Soon2BEVO

iTrader: (41)

Oh I see. Well, I bought the Hallman Pro, not the Pro RX. I guess it should be advised people get the regular (and cheaper!) Pro model since you dont have to fiddle around with springs or any of that non-sense. I put mine in and havent thought about it since.

SuperHatch

iTrader: (23)

Jude never has to worry about boost....