Shift Points - Hypertech 2000 Reference Manual And Step By Step Installation Manual

tires have proper air pressure. Compare your settings to a GPS, and adjust the height up or down as
needed to dial in the exact calibration.
Another method of measuring the tire diameter:
1. Place a chalk mark on the tire where it contacts the pavement and also mark the pavement. These
marks should be at the center of the tire footprint pointing straight down to the pavement.
2. Roll the vehicle in a straight line until the chalk mark makes one revolution and is pointing straight
down at the pavement again. Mark the pavement again at this new spot.
3. Measure (in inches) the distance between the two (2) marks on the pavement. Divide the measurement
by 3.1416. This will give you the tire height in inches.
Use the buttons to the right of the screen to scroll up or down, and highlight the desired tire size, in ¼
inch increments. Press 'Select' to save the chosen value.
Note: Only select this feature if the vehicle has a different size tire than what was installed from
the factory.
SHIFT POINTS (Option available for 6-Speed 6L80 transmission only)
Use the buttons to the right of the screen to highlight Shift Points. Press the 'Select' button
to change the RPM at which the transmission shifts at wide open throttle.
This feature allows adjustment of the wide open throttle shift RPM for each gear, up or down, in 100
RPM increments. This setting does not affect part throttle shifting. To determine the factory shift point
in each gear, accelerate the throttle wide open while in Drive, and hold it until the transmission shifts.
Note the RPM when the gear change occurs.
These settings are totally subjective, and based on user feel, or by comparison using the time slip at the
track.
For shift point optimizing, test only one (1) shift point at a time until the best RPM shift point is found
for each. The shift point adjustment range is +/-500 RPM in 100 RPM increments for each of the shift
points for the vehicle. If changes are made to the shift points, the engine rev limiter must also be
adjusted accordingly (See chart below). Not doing so may result in damage to the engine or powertrain.
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