A Haltech MAP (Manifold Absolute Pressure) sensor provides instantaneous pressure information to the Electronic Control Unit (ECU) from the intake manifold – the amount of boost or vacuum in the intake manifold.
DESCRIPTION
A Haltech MAP (manifold absolute pressure) sensor provides the electronic control unit (ECU) with instantaneous pressure information from the intake manifold—the amount of boost or vacuum in the intake manifold.This is necessary to calculate air density and determine the engine's air mass flow rate, or, in other words, engine load.Engine load is used as a reference for all base fuel and ignition.
1 Bar Map Sensor
A 1 bar MAP sensor can read intake pressures lower than or equal to atmospheric pressure, for this reason a 1 bar MAP sensor is only suitable for naturally aspirated engines (i.e. not turbocharged or supercharged).
2 Bar Map Sensor
A 2 bar MAP sensor can read intake pressures up to 1 bar of positive pressure above atmospheric pressure (otherwise known as boost). This is equivalent to approximately 14.7 psi of boost or 100 kPa of positive pressure. This sensor is suitable for turbocharged or supercharged vehicles with an output of 15 psi or less.
3 Bar Map Sensor
A 3 bar MAP sensor can read intake pressures up to 2 bar of positive pressure above atmospheric pressure (otherwise known as boost). This equates to approximately 29.4 psi of boost or 200 kPa of positive pressure. This sensor is suitable for supercharged or turbocharged vehicles operating between 15 psi and 30 psi of boost.
ATTENTION
All GMC Racing items that provide horsepower increases beyond those permitted by the highway code in the user's country are intended for competitive use only. GMC Racing declines all responsibility for any use of the product contrary to national regulations.
