Installing MBC

theKnifeArtist

theKnifeArtist

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Apr 6, 2006
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i know i saw a good thread here how to install it, but i cant find it again. do i need a vacuum tee?

i saw this from another thread..
p507414_1.jpg

where does that vacuum hose go thats just laying there?
 
Mr.PFloyd

Mr.PFloyd

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johnathan1 said:
You should make the vacuum lines longer, so that you can adjust it more readily...like maybe on top of the fender? I have mine tied to the AFM housing bracket.
Click to expand...
longer lines will cause it to spike.
 
theKnifeArtist

theKnifeArtist

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89Turbo said:
to the bottom of the accordian hose for the ps idle up.
Click to expand...

ah, hah, oh duh...
well actually, i just pulled it off whatever it was on on the other end trying to move the accordian pipe out of the way without disconnecting it cuz its a bitch to put back on...shit..where is this connection on the other end...
 
theKnifeArtist

theKnifeArtist

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i found the other end of the ps idle thing...its on this thing where another line is comming off of it, right...yeah..must be...
i made the lines short, i'll experiment with longer lines sometime else.
 
johnathan1

johnathan1

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Yea, it will not cause spiking, unless you are using a shitty valve...I have about 4 feet or so of hose connecting mine...and I have been running 11psi with no spiking or issues. But then again, I am using a Grainger ball and spring valve... Is yours the one that Dr. jones sells?
 
theKnifeArtist

theKnifeArtist

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i would take a picture of it to show you, but i let someone borrow my camera. i think this one is a ball and spring valve too. i got it from empera, and judging by his car, i'd say this has to be a good mbc.
 
theKnifeArtist

theKnifeArtist

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so i installed it and started it..it idled crappy and then it smoothed a little. when i gave the slightest bit of gas, it died...did i put it on backwards?
 
theKnifeArtist

theKnifeArtist

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im pretty sure the valve im using is a ball and spring valve. i got it from empera, and judging by his car, i'd say its a good valve.
so i took out my shims and i installed the mbc and loosened the adjuster almost all the way out. i have yet to his fuel cut, but what boggles me is why i still am running a lot of boost. i dont know what it is but im pretty sure i pegged the needle again. im just gonna take it easy for a while until i can put in a boost gauge that doesnt suck.
 
johnathan1

johnathan1

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I have found that the stock boost gauge is incredibly slow to react...like my aftermarket boost gauge will show full boost (11psi) when the stock gauge has just hit 4psi and is slowly rising...and it is usually 1-2psi off... But if you haven't hit fuel cut yet, then you are somewhere between 8-12psi.
 
OneJoeZee

OneJoeZee

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yeah wait til you get a gauge to turn it up.

theKnifeArtist said:
im pretty sure the valve im using is a ball and spring valve. i got it from empera, and judging by his car, i'd say its a good valve.
so i took out my shims and i installed the mbc and loosened the adjuster almost all the way out. i have yet to his fuel cut, but what boggles me is why i still am running a lot of boost. i dont know what it is but im pretty sure i pegged the needle again. im just gonna take it easy for a while until i can put in a boost gauge that doesnt suck.
Click to expand...
 
theKnifeArtist

theKnifeArtist

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so i got a gauge..
and i'm hitting fuel cut at 14-15 all the time with the screw screwed all the way out on the MBC. what can be wrong here? can my wastegate be messed up? i'm gonna run a hose from the turbo directly to the wastegaste tommorrow and see what boost i get. how would i know if the boost controller is backwards? any other ideas?
 
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