Haltech IQ3 Data Logger Dash - Manual (Page 38)

IQ3 Data Logger Dash Installation Manual
38
Shift Lights
To program the shift lights, simple determine the RPM Channel to activate the shift lights
(typically Engine RPM) then select the shift point for each gear. Finally, select the RPM Interval
between each shift light.
Example: Shift point for each gear is 5000 RPM. Interval
is 100 RPM. With 5 shift lights in use (10 total lights that
are displayed two at a time), the software will calculate
back from the programmed shift point and start the
shift lights at 4600 RPM and increment to 4700, 4800,
4900 and with all lights on at 5000.
Shift Light Formula: Shift Light Interval x 4 minus Shift
Point = Starting Point of Shift Lights
100 x 4 = 400. 5000 – 400 = 4600 (start of shift lights)
Gear Calculation
The gear position is most easily configured using the IQ3
Setup Mode 2 programming. The IQ3 derives the gear
position by calculating the ratio between the engine rpm
and GPS speed at the time each gear is programmed.
It is also possible to manually enter the ratio values
utilizing the Gear Calculation page. However, the ratio
values are not the transmission or final drive ratios, but
instead is the ratio between engine rpm and GPS speed.
There are two methods to determine the ratio:
1. Driving: Place the vehicle in first gear and accelerate to a steady, slow speed. Note the
engine RPM and the GPS speed. Place the vehicle in second gear and note the engine
RPM and GPS speed. Repeat the process for all gears. Below is the formula utilized.
GPS Speed / Engine RPM (GPS Speed divided by Engine RPM) = Gear Ratio
2. Manual Calculation. This involves calculating the vehicle speed as determined by engine
RPM, gear ratios and tire circumference and applying the above formula to those
calculations. Engine RPM / 1
st Gear Ratio / Rear Gear Ratio x Tire Circumference / 12 *
60 / 5280 = Speed (mph)
Calculate the ratio for each gear and insert the ratio in the appropriate input box.