I built the airbox top bracket with a heavy steel strap. The strap uses an existing nut that Suzuki plastic welded into the cover. There will be a second bracket at the very bottom of the airbox attached to the engine. The two vacuum ports in the box will be used to connect up a vacuum can. The center inlet is the original Positive Crankase Ventilation (PCV) or crankase vent for the motorcycle. I will use it for the same purpose except it will feed into a can instead of a small semi open filter compartment that exists in the box. The second inlet will be routed to a large manifold vacuum port. The combined Manifold Absolute Pressure and Temperature sensor MAP will attach to this can through the top of the box for easy access.
My thoughts are these. The crankase vent on the Focus feeds directly into the manifold which is past the single throttle body. This imperfect vacuum is what the MAP/Temperature sensor reads. A large vacuum port size will insure good vacuum. The fact that the can will be inside the airbox should give a reasonably close to factory temperature reading.
The strap needs some paint.
Note I received my new narrower 5/16 x 2.25 inch maximum clamps. This really improved the appearance and connections for the shortened throttle bodies.
The interior porting and polishing of the intake manifold is complete. It needs just a small touch to a couple of ports after mounting the throttle bodies for a close contact fit.
John
