This is a little guide to installing a manual boost controller on an Evo VIII. I installed a Dejon Tool MBC on my 04 RS, but the same basics apply to all Evo's and MBC's. I installed mine in a difficult to reach spot, deep and well concealed behind the intake scoop (it's not like it needs constant adjusting). You can mount it anywhere you really want, but keep in mind that the closer to the wastegate the unit is, the better it will perform. Please, don't do this unless you have a boost gauge.
You will need the following tools;
10 mm socket and various extensions
needle nose pliers
4 boost/vacuum caps (4mm)
Release the four metal clips that hold the top of the air box and remove the two plastic screws and clips on the scoop. Remove the intake scoop, top of the box, and the filter inside.
There's a removable zip tie holding boost and vacuum lines. Remove it and release the lines from the little holders on the intake. Remove the breather hose on the intake pipe (it's in the middle of the picture), remove the return line from the boost control solenoid and remove the intake pipe.
Make sure you set up the controller per the manufacturers instructions. Mount your controller where your want. Connect your teed vacuum source. The line out of the boost controller plugs directly into the wastegate.
Put everything back together in the reverse order. Double check your clamps and hoses.
Drive slowly at first and see what the boost is doing. Push it a little bit at a time to see where the boost is set at. Adjust it to your desired boost, screw in raises boost, and screw out lowers boost. Your done.
Last edited by turbolarry; 02-11-2005 at 11:20 AM.
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