user3103: Is it possible to read the exhaust gas pressure of a turbo car with an Arduino, and then control an electric motor based on the pressure?

user3159: Yes, I don't see why it wouldn't be possible.
You would need a sturdy barometer, preferably a digital I2C one because they are typically more accurate. I recently bought this one to measure altitude: BMP180 Barometric Pressure/Temperature/Altitude Sensor- 5V ready.
Be careful about the temperature that the sensor will have to deal with, its maximum temperature is 85°C (185°F).
The motor, I'm assuming, would be fairly large so you would need a beefy motor driver that uses a 5 volt logic level, maybe like this one: L298 Dual H-Bridge Motor Driver.
This is a fairly difficult project, I'd say mostly because of the difficulty you would have mounting the barometer and motor. Never the less, it still is possible. 

3103: <p>Is it possible to read the exhaust gas pressure of a turbo car with an Arduino, and then control an electric motor based on the pressure?</p>
 3159: <p>Yes, I don't see why it wouldn't be possible.</p>

<p>You would need a sturdy barometer, preferably a digital I2C one because they are typically more accurate. I recently bought this one to measure altitude: <a href="http://www.adafruit.com/products/1603" rel="nofollow noreferrer">BMP180 Barometric Pressure/Temperature/Altitude Sensor- 5V ready</a>.</p>

<p>Be careful about the temperature that the sensor will have to deal with, its maximum temperature is 85°C (185°F).</p>

<p>The motor, I'm assuming, would be fairly large so you would need a beefy motor driver that uses a 5 volt logic level, maybe like this one: <a href="http://www.seeedstudio.com/depot/L298-Dual-HBridge-Motor-Driver-p-284.html" rel="nofollow noreferrer">L298 Dual H-Bridge Motor Driver</a>.</p>

<p>This is a fairly difficult project, I'd say mostly because of the difficulty you would have mounting the barometer and motor. Never the less, it still is possible. </p>
