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Hallman MBC doesnt hold?

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Old Jul 6, 2009 | 09:32 PM
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nubi4life
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Hallman MBC doesnt hold?
hey guys i have the Hallman MBC that you could adjust from inside the car with the knob. for some reason the mbc isnt holding boost when i set it. it just goes all the way past 30psi. can it be that i need a new mbc? i have all the lines hooked up right too
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Old Jul 6, 2009 | 09:33 PM
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Did you try a boost leak test?
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Old Jul 7, 2009 | 02:49 PM
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You may need a new spring? We had to put a stiffer spring in my buddies Forge Boost Contorller when he put in his BBK.
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Old Jul 7, 2009 | 02:58 PM
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Check to make sure nothing is binding the spring.

what version of the hallman do you have?
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Old Jul 7, 2009 | 03:03 PM
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Originally Posted by dambikeracer
You may need a new spring? We had to put a stiffer spring in my buddies Forge Boost Contorller when he put in his BBK.
^ +1 do you have the Hallman Pro? that mbc should have a ceramic ball, light and heavy springs included which should help as well...

This kit has a ceramic ball instead of the 316 stainless ball that comes in our other valves. The ceramic ball only weighs a fraction of what the stainless steel ***** weighs. This weight difference allows the ceramic ball to act very quickly as it is constantly changing directions during operation. The ceramic ball in conjunction with the use of a lighter spring will allow very fine adjustment of boost up to 4 to 5 pounds of boost over stock. Boost has been able to be adjusted in half pound increments very consistently with this valve.
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Old Jul 7, 2009 | 03:22 PM
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If it is hitting 30psi it sounds like the ball could be sticking from machining oil. I would try loosening it all the way, and sticking something inside to try and free it.

Any other questions feel free to send me a PM!

-Brian
www.stmtuned.com
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Old Jul 8, 2009 | 02:33 AM
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yeah i have the hallman mbc pro. theres a knob and i could control the boost from inside the car.i had a boost leak test done and all seems well. hey whats the best manual boost controller out there guys?
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Old Jul 8, 2009 | 07:29 AM
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Originally Posted by nubi4life
yeah i have the hallman mbc pro. theres a knob and i could control the boost from inside the car.i had a boost leak test done and all seems well. hey whats the best manual boost controller out there guys?
Hallman pro....
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