Recalibration For Non-Stock Tire Sizes; (And Non-Stock Gear Ratios); Section 15 - banks PowerPDA 61100 Owner's Manual With Installation Instructions

Section 14

RECALIBRATION FOR NON-STOCK TIRE SIZES

(AND NON-STOCK GEAR RATIOS)

Note: The Banks PowerPDA is capable
of displaying a corrected speed on
the System Monitor. This will improve
the accuracy of performance tests if
you have non-stock tires sizes or gear
ratios. The Banks PowerPDA does
not reprogram your vehicle's ECM to
correct the speedometer.
1.
Press the center button on the
5-way navigator to take you the the
System Menu screen.
2.
Touch the button labeled 'More>'
to move to the second screen of the
System Menu.
3.
Next, touch the 'Recal. Tire Size'
button. (Figure 53)
Note: In order for the Banks PowerPDA
to perform the recalibration procedure,
Gauge G3 or G4 must be set to
monitor MPH. Refer to section 10 to
change Gauge G3 or G4 to read MPH.
4.
The Banks PowerPDA can display
a corrected vehicle speed for vehicles
that have non-stock tires or gear
ratios. This procedure only needs to be
performed once unless you delete and
reinstall the Banks PowerPDA software
or change tire size or gear ratios after
calibration.
Note: To reset the scaling to its
original setting, perform this procedure
with the vehicle stopped. (MPH=0)
Touch the button labeled 'Next>'.
(Figure 55)
Note: To calibrate your speedometer
using a pace vehicle, proceed to step
5. To use a GPS device, proceed to
step 10.
Pace Vehicle Method
5.
This procedure requires the
assistance of another vehicle that
will drive next to your vehicle at a
specific speed. You will drive the same
speed as the 'pace' vehicle. Once your
speeds match exactly, you will press
the 'CENTER' button on the 5-way
navigator. The Banks PowerPDA will
then calculate the proper tire scaling
factor.
Touch the button labeled 'Next>'.
(Figure 56)
6.
What speed will the 'pace' vehicle
drive during recalibration?
Touch the button labeled 45 MPH, 55
MPH, or 65MPH. The selected button
will display parenthesis around its text
to denote active status. (See Figure
57)
NOTE: The pace vehicle should drive
the speed you choose. Ignore what
your speedometer or what the Banks
PowerPDA displays for MPH during this
process.
7.
Touch 'Start Recal'. The Banks
PowerPDA will return to the System
Monitor and wait for your input to
calculate the scaling factor.
8.
Accelerate the vehicle until your
speed matches the pace vehicle's
speed as closely as possible. Ignore
the speed indicated by the Banks
PowerPDA and your speedometer.
Figure 55
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