ACT sensor and Speed Density

In the MAF cars the ACT (as well as the ECT) is used to modify the Ignition Timing and Fuel.

I am sure it is the same with SD cars.

I would leave the ACT in the stock location, unless you have a way of changing how the EEC uses the ACT signal. (A custom tune on a dyno, or hand held tuner)


My thoughts,
jason