Edelbrock 3670 User Manual - page 48

48

3.2.3.8

Mass Air Flow (MAF) Sensor (optional)

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Mass Air Flow (MAF) Sensor

Figure 18

Installing / Replacing the optional Mass Airflow (MAF) Sensor

Your Victor or Super Victor System has the capability to run a GM digital Mass Airflow

sensor (MAF). A MAF sensor will feed the ECM airflow information which is used in the

control calculations and used to auto-calibrate the Volumetric Efficiency map.

The MAF can be used only for the auto-cal OF VE during dyno testing, or it can be run all

of the time; constantly adjusting for changes in airflow due to wear or engine

modifications. The sensor that should be used is a 1999-2002 GM # 25318411 or the

25341604

 85 mm sensor from the '02 Corvette Z06

. If the sensor is only enabled for the

tuning session, be sure to turn the sensor off by selecting "none" in the MAF section of

the setup wizard. This will prevent Mass Airflow sensor faults during later operation.

In high horsepower applications, your system is capable of running two of these sensors

in parallel to keep restriction to a minimum. Consult your Edelbrock representative for

information regarding adding and using a second sensor.

The mounting of the sensor is very important to accurate measurement and operation.

The sensor should be mounted as far away from the throttle body as possible (a

minimum of 12”) and between the air filter and throttle body. All tubing and bends

should be smooth with even cross-sectional area. Allow a minimum of 8” of straight

tubing in front of the sensor so that airflow is entering as straight as possible into the

sensor. Follow the factory method of plumbing where possible. Figure 18 shows a sensor