i just got the vast tdc and forgembc and was wondering which way i should install the mbc. should i run it inplace of the j valve, but keep the j valve plugged into the harness w/ capped off ends to prevent cel? or should i run it in parallel with the j valve, which i have no idea how to do.

let me know so i can have it in tonite!

 

What's the "J" valve?

From VAST

 

sry i was wroking on my friends jetta all day.. i meant to say n75.

i put the mbc in today but there was no change? i feel it runs the same with the n75?

 

Why did you buy & install the MBC? Running it in parallel with the N75, just controls boost spikes, it will not raise the tapered boost.
You need to set it up when running Vag logs on block 115.

If you want it to control boost, then you need to take the N75 our of the vacuum circuit, but leave it plugged in.

Really the MBC is more for K04 cars, then K03 cars.

 

Exactly,

There is not point in using the MBC with the N75. If you do that on a K03 car there will be no difference. Take out the N75 and you will see the difference.