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MAP Sensor
Designed to be a speed density system, the TEC-II relies on a Manifold Absolute Pressure (MAP) sensor for all of its fuel and ignition calculations. Unlike our stock mass airflow meter, which measures actual airflow (when it's not blown, that is), the MAP sensor reads engine load. Just a fancy word for manifold pressure, load is typically displayed in either kiloPascals (kPA) or inches of mercury. Now, here comes the fun part: 100 kPa is equal to 1 Bar which is equal to one standard sea level atmosphere. The intake manifold of a naturally aspirated engine, at wide-open throttle, should see something pretty darn close to this value. A turbo or supercharged engine, however, will see much higher loads. With 14.7 pounds (or 1 bar or 100kPa) of boost, the manifold will see approximately 200kPa of absolute manifold pressure. Remember that a base atmospheric pressure of 100kPa plus 100kPa of boost pressure equals 200kPa of absolute manifold pressure. But not all MAP sensors are created equal. In fact, we have to choose between a 1-, 2- or 3-Bar unit. Since we don't plan on running more than 1-Bar of boost in the future, we chose to use the 2-Bar MAP sensor.
To install, we bolted the MAP sensor down to the fuel rail bracket and ran a short, uninterrupted vacuum line from the sensor nipple to the nipple right on top of the intake manifold plenum. Never plumb the MAP sensor into an individual intake running as the undamped pressure pulses will disrupt fuel calculations. Also, Electromotive suggests that the vacuum line be as short as possible for maximum accuracy. As for wiring, the black wire goes to Input Pin 2 (S GRD), the white wires goes to Input Pin 3 (MAP), and the red wires goes to Input Pin 4 (+5V).
Read more:
http://www.modified.com/projectcars/001 ... z1QVPOjqsEaprès je suis pas bilingue

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