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SmartMAP Model SM-300 Installation Instructions

What is the SmartMAP??
The SmartMAP? model SS-300 replaces the check valve and restrictor assembly used by most Honda/Acura turbo and supercharger kits and prevents the engine computer (ECU) from shutting down the engine when the manifold pressure is above atmospheric (boost).

How does the SmartMAP? work?
The SmartMAP? connects inline with the stock (OEM) manifold absolute pressure (MAP) sensor and limits the MAP voltage that is applied to the ECU. The limit (clamp) voltage value is preset and can not be adjusted.
The stock Honda/Acura NSX MAP sensor has an output range of about 0.5V at high vacuum to about 2.7V at atmospheric pressure (wide open throttle for normally aspirated NSX’s). With a turbo or supercharger installed, the manifold pressure will increase above atmospheric, and the MAP sensor voltage will rise above 2.7V. At some voltage above 2.7V, the NSX ECU will assume that there is a problem with the sensor and shut off the engine, since under normal conditions (without the turbo/SC), the MAP output will never exceed about 2.7V. The SmartMAP model SM-300-275 prevents the ECU from shutting down the engine by limiting the MAP sensor voltage to the ECU to 2.75V -0/+0.15V.

Application for the Acura/Honda vehicles
The SmartMAP? model SM-300-275 was originally designed for the Acura/Honda NSX. It should also work on other Acura/Honda vehicles that have a MAP sensor with a similar output voltage as the one in the Acura/Honda NSX.

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