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  1. #1
    Senior Member Two Rings slideitsidewayz's Avatar
    Join Date
    Jun 30 2008
    AZ Member #
    30429
    My Garage
    1998 Audi A4 1.8tqm gt2871r
    Location
    North Jersey

    moved my mbc...quick question...

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    alright, when i first bought my car it came with a mbc and it was in a horrible place...it was basically right above the turbo and was resting against the engine so you can only adjust it when the car was cold otherwise youd burn yourself. anyway i was lost the spring in the boost controller so i bought a new one. after getting the new mbc i decided to relocate it to a better stop. i bought 2 new hoses about 2-3ft...i used pretty must all of it. i replaced the hose from the wastegate to the mbc and i used the other hose to ad an extension to the part where there is the "T" fitting (idk what its called). so i ran the hoses behind the airbox heat shield and up a little further...if you had all of the stock plastic coverings on the new mbc would be located near the top right of the air box...almost hanging over where the cat would be.

    Before getting the new mbc i was boosting 15psi.

    My question is...now that i moved my boost controller...about 2.5 feet from where is was previously...would that cause me to lose a few psi? I have tinkered with the mbc to try to adjust it to 15psi again but now it seems to only spike as high as 12-13psi. can you lose psi from moving it a few feet? ive checked and there are no boost leaks at all. so im stumped and ive never heard of this...just wondering if any of you know.

    the set up is pretty nice. i wish i could have posted some pics, but my camera is broke....so i tried to be as descriptive as possible. ill try to get some pics soon.

    thanks for the help guys...HAPPY NEW YEAR!

  2. #2
    Veteran Member Four Rings alen's Avatar
    Join Date
    May 11 2004
    AZ Member #
    2093
    My Garage
    1.8tqms
    Location
    ghettlanta

    Re: moved my mbc...quick question...

    I wish I could help you with your question, but I don't think you should've lost 2-3 psi just from extending a few feet of the vacuum line.

  3. #3
    Veteran Member Four Rings njm23's Avatar
    Join Date
    Feb 28 2007
    AZ Member #
    16023
    My Garage
    04 a4 USP ; ATS
    Location
    NJ

    Re: moved my mbc...quick question...

    nah man.. not possible. try adjusting your mbc some more

  4. #4
    Veteran Member Four Rings ghost6303's Avatar
    Join Date
    Nov 03 2008
    AZ Member #
    34881
    My Garage
    98A41.8TQM
    Location
    CT

    Re: moved my mbc...quick question...

    did you replace the spring with the same exact one?

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