Auto Meter 4380 - Manual (Page 3)

E.) Real Time
– After initial power-up, D-PIC will perform an animated opening sequence and then default to Real Time mode. Note: If
you have just installed D-PIC you will need to perform a vehicle calibration to ensure that D-PIC will provide you accurate readings in
Real Time mode. All other performance modes will auto calibrate during initiation and do not require this additional step for accurate
operation. Please see additional information about Vehicle Calibration under Set Up. Failure to perform this calibration will cause the D-PIC
to provide inaccurate readings in Real Time mode only. During real time operation, the gauge will display the operator’s choice of
acceleration/deceleration or lateral G-forces on LED bar graph array and alphanumeric display. The default mode of operation for real time is
the front/rear axis display. Acceleration forces will be displayed on the bar graph array to the right of center. Deceleration forces will be
displayed on the bar graph array to the left of center. To change the display to the lateral axis press the B button. To change the range of G
forces capable of being displayed on the LED array see
Bar Graph Forward/Lateral High/Low under Set Up.
Peak Recall – While in any mode, D-PIC will record the highest or peak G-force values for all four axes (accel, decel, left, & right). To view
these values, press the C button during Real Time mode. To move to the next value, press the A button. To clear the value, press the B button.
Gauge will return to real time operation if no buttons are pressed for 4 seconds. Peak G forces are displayed and cycled in the following order
with the codes shown below.
– Peak Acceleration G Forces – Peak Deceleration G Forces
– Peak Lateral Left G Forces – Peak Lateral Right G Forces
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results. With an automatic transmission you may need to adjust this procedure so you don't downshift under full throttle
in second gear. The important point here is that when you are in 2nd gear you should be at full thottle when the engine
is anywhere near its peak horsepower rpm.
When the vehicle has been brought to a stop, D-PIC will display your Horse Power results. The result is displayed in
terms of Horse Power (HP). To view your results again, press the B button. To save your results as your new Best,
press the A button once to display
, then press the B button to confirm. Note: Saving a run as your new Best
run will overwrite (erase) your previous best run. D-PIC will automatically save/overwrite your last run file each
time you make a new pass. To view your best run, press the A button until
is displayed and then press the B
button to view. To view the difference between your last run and your best run, press the A button until is
displayed and then press the ENTER button to view. To exit to Real Time mode, press the C button.
Wheel Horsepower – Static vs. Dynamic – What’s the difference?
Static Wheel Horsepower - We all know that wheel horsepower is lower than engine horsepower due to power losses in the drivetrain.
But, what is the difference between Static and Dynamic Wheel Horsepower? On a chassis dyno, vehicles are not in motion, and as a result,
additional horsepower losses that are present in an actual drag race due to wind speed, aerodynamic drag, rolling resistance and non-level
driving surfaces are not taken into consideration.
Dynamic Wheel Horsepower – is measured while the vehicle is in motion. Wind speed and direction, aerodynamic drag and rolling
resistance can all slow a car down. The D-PIC measures the absolute acceleration of the vehicle, including the affects of those factors.
Which is more important? – Dynamic Wheel Horsepower is a true representation of your car’s acceleration ability, taking all factors into
account, including things not found on a chassis dyno, such as traction, rolling resistance, aerodynamic drag, etc. If your engine has 1,000
horsepower on the engine dyno, but you can’t apply that to acceleration, or you don’t account for all the air that you have to move, what does that
really tell you about your acceleration ability? D-PIC measures Dynamic Wheel Horsepower which accounts for all of the real world forces that
aren’t accounted for on a chassis or engine dyno and is the most comprehensive overall indicator of your vehicle’s performance on a race rack.
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F.) Setup Mode
– To Select Setup Mode repeatedly, press the MODE button until is displayed. Press the ENTER button to
confirm. To exit setup mode and return to Real Time display, press EXIT (C button).
Roll Out: This function only affects the 1/4 mile function. Roll Out is the distance that your vehicle travels before the ET timer starts. At a
dragstrip this distance is how far a car must move before it “rolls out” of the starting beams and starts the timer. By dialing your Roll Out
distance on the D-PIC to match your roll out distance at the dragstrip, the D-PIC calculation should be very close to the timing equipment at the
strip. With a Roll Out of zero, D-PIC will give you a slower ET reading than a dragstrip timer, as the D-PIC will start the timer the instant the car
moves, whereas the dragstrip timer does not start until after the car fully rolls out of the start beams. A zero Roll Out will however be the most
accurate indication of how long it takes your car to cover a standing 1/4 mile. The factory default setting for Roll Out is 6” as this seems to
match the average staging practices at most dragstrips. Increasing your Roll Out distance will decrease the ET readings that D-PIC will display
as you are essentially giving your vehicle a head start up to 18” before the timer starts. We recommend that you dial in D-PIC to match your
local track by following the procedure below and adjusting your Roll Out distance up and down until the D-PIC and your track timing equipment
are in sync.
To select Roll Out, enter Set Up mode as described above and then press the A button until is displayed, then press the B button to
confirm. The number displayed represents Roll Out distance in inches, and may be adjusted from 0 to 18. To increase the value shown, press
the A button, to decrease, press the C button. When the desired Roll Out value is displayed press the ENTER button to confirm your setting.
Vehicle Weight: Accurate vehicle weight is necessary for D-PIC to make a correct Horsepower calculation. Vehicle
weight should be entered in pounds to the nearest whole number. The value entered should be total weight of the vehicle and driver for the
most accurate horsepower reading. Underestimating or inputting a lower than actual vehicle weight will cause D-PIC to calculate a much lower
than actual Horse Power value. For example, if you enter your car’s weight of 3,000 lbs with 1/4 tank of gas and only you in it, and then make a
HP measurement with a full tank of gas and 2 friends in the car (+500 more pounds) the HP number will likely be lower than a run with less
weight in the car. Likewise, overestimating or inputting a higher than actual vehicle weight will cause D-PIC to exaggerate your vehicle’s
Horsepower. Visit your local track or other appropriate vehicle scales to receive an accurate vehicle weight that you can enter into the D-PIC
following the procedure outlined below.
To select Vehicle Weight, enter Setup as described above, then press the A button until is displayed. Press ENTER to confirm. The
value displayed is total vehicle weight in pounds (lbs). To increase the value either press or press and hold the A button. To decrease, press or
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