escargot

If it does need it, can I just leave the electronic portion plugged in and disconnect it from any boost lines? That way it'll have no impact on anything, correct?

-Mike.

QCRAZY

Make sure you get the MBC set right so you don't *upset* the car.

Audi2ptzero

Remove the N75 valve from the intake and unplug the other 2 vac lines.

2. Leave the N75 valve plugged into the intake tube while removing one vac line and looping the other vac line to the side where you just removed the first vac line.

Either way will work as long as you leave the harness plugged into the N75 valve.

escargot

In <A HREF="http://www.autospeed.com.au/cms/A_0670/article.html?popularArticle">this</A> they use a "pressure relief valve." Do I really need one? Appearently it adjusts "wastegate creep." Is that what makes the turbo spool faster by faking that you want higher boost at first, or what? I'm just planning to do only the boost controller.

ralley

I am not sure how a manual boost controller will stnad up to that setup, or which is actually better for the car but they seem to hook up the same way.

auditunerb5

With both valves relief and regulator it's like a peak and hold setup. You can set to peak where ever and then the relief opens and the regulator takes over to hold at your set value. With a small turbo just the regulator works fine (works like a adjustable bleed). But with a larger turbo setup the regulator kills spoolup. The valve is stable if you keep it from heating up dramatically. (keep it in the airbox)

Devious27t

i run my MBC around the N75 and it works fine... search and there are some diagrams on how to do it

escargot

<A HREF="https://forums.audiworld.com/s4s6/msgs/25405.phtml">Click to see...</A>

-Mike.

DAP@EPL

The MBC itself is the pressure relief valve.

-Dave Pramanik

escargot

Ah. Thanks!