An aftermarket boost gauge should be
one of the first gauges you should get for your FC3S. The stock boost
gauge in the instrument cluster is not a very accurate display of actual
boost/vacuum the engine is seeing. An aftermarket boost gauge gives you a
more accurate picture of what boost/vacuum you're running.
There are two
types of boost gauges. The mechanical boost gauge requires you to run a
hose or tube from the engine to the boost gauge itself. The electronic
boost gauge has a dedicated pressure sensor that is mounted in the engine bay;
the pressure sensor is connected to the engine via a short length of hose, while
signal and power is passed through a wire harness back to the boost gauge inside
the vehicle. Electronic boost gauges are more expensive than purely
mechanical boost guages.
The easiest place to "T" into a vacuum/boost
line from the engine is into the same hose that connects to your stock boost
sensor off of the ACV cluster.
This hose has a small restrictor pill in it, so try and "T" into the hose
farther away from the engine closer to the boost sensor.
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