User Manual

Evolution FORD 4.6 and 5.4 Liter

Recommended Dyno Procedure

Using a dynamometer (dyno) to measure the power output of a vehicle is a

popular and very accurate method to check the performance gains achieved

when making modifications to a vehicle. Traditionally, you would select a

gear that would provide a 1:1 ratio through the transmission. This is usually

gear on a manual transmission or 3

gear on a 4 speed automatic

transmission. Using these gears provides the most accurate power rating

because the results are not affected by the torque multiplication which can

occur when using lower gears.

The F150, however, will not be able to run a full dyno run in 3

gear. The

wheel speeds generated are higher than most dynos will allow. The simple

solution is to perform all dyno runs in 2

gear, although this method can

present problems due to the F150’s torque management control system.

Torque management is nothing new. Manufacturers have been using it to

control rev limiters, speed limiters and traction control for many years. The

F150 also uses torque management to control the actual rate of acceleration

of the vehicle. There is also torque management present when the

transmission is placed in 1

and 2

gears. The torque management can cause

erratic and inaccurate dyno results. Because of the torque management, it is

moderately difficult to achieve accurate results from dyno runs.

Currently, the most consistent and accurate method of performing dyno runs

is as follows:

• Obtain a scan tool that allows for “Active Command” modes. The

Hickok NGS™ is the one Edge Products uses for testing and also the

recommended tool. (Note: Diagnostic modes may vary between tool

manufacturers and some options may not be available, including

“Active Command” modes.)

• With the vehicle in “Drive” and using the scan tool in “Active

Command” mode, select 2

gear and lock the torque converter. This

will prevent the transmission from shifting into 3

giving you a clean

run over the full RPM range.