FT500 SFI / FT500LITE SFI
51
Sensors and Calibration
15.10 Gear detection
Gear detection
Driveshaft RPM
Gearbox RPM
Rear wheel speed
Front wheel speed
Sensors and Calibration
In this menu there are the settings related to gear detection change
(display and log). There are 5 different ways to detect it: by RPM drop
(drag race only), by gear position sensor (requires a sensor in the
transmission), by interpolating the current wheel speed versus engine
RPM, by pulse and by gear shift output.
To view the currently engaged gear in the FT500 dashboard, go to
“Interface Settings” and then “Dashboard Settings”. Once in, click in
the cell where you want to display the gear and select “Gear”.
The first mode, by RPM drop, must be used only in drag race cars,
since it can only detect upshifts and not downshifts. The third screen
is for safety configurations, used to prevent false gear detection due
to traction loss. Default values are good to most cases.
The fourth screen is for the RPM drop programming to each gear. The
fifth screen is to enable and program the timeout for gear shift detection
that is another safety feature to prevent false detection.
Disabled
Enabled
Gear detection 1/5
Number of gears
6
Gear detection 2/5
Analog sensor
RPM drop
By wheel speed
or driveshaft
Gear shift
based output
By input signal
Detection Type
Gear detection 3/5
Block detection
after gear shift
0,50
s
0,50
s
Detection block
after launch
Gear detection 4/5
RPM drop for gear shift detection
200
3 - 4
200
4 - 5
200
2 - 3
200
1 -2
200
5 - 6
Gear detection 5/5
wait time for
gear shift detection
1,00
s
Gear count is increased
whenever engine RPM
stays above the gear shift
RPM for the time
setup beside.
Timeout for gear
shift detection
Gear detection 6/7
External button
2-Step
Gear reset
Activated at 12V
Activated at 0V
Button mode
The second mode reads an analog gear position sensor, which is a
potentiometer that indicates the engaged gear in transmissions already
equipped with this sensor. Select the input that will read the sensor
signal and then configure each gear voltage
To find the gear voltage, use a multimeter, in 20VDC scale, connected
to the output of the gear position sensor and engage a gear at a time.
Gear detection 4/5
Analog level for each gear
2,0
3
2,8
4
0,2
N
0,0
R
3,6
5
4,4
6
1,2
2
0,4
1
Gear detection 2/5
Analog sensor
RPM drop
By wheel speed
or driveshaft
Gear shift
based output
By input signal
Detection type
Gear detection 3/5
White 1: O2 sensor #1
Selecione a entrada desejada
None
White 2: 2-step
White 3: Air Conditioning
White 4: Oil pressure
The third mode crosses the wheel speed and RPM to calculate the
engaged gear.
To configure, set the number of gears, gearbox ratio and differential
ratio.
This detection mode will only show the engaged gear if the vehicle is
moving and there is wheel speed reading.
When the clutch is pressed or the gear is disengaged (neutral)
momentary misreading may occur.
Gear detection 2/5
Analog Sensor
RPM drop
By wheel speed
or driveshaft
Gear shift
based output
By input signal
Detection type
Gear detection 3/5
4,10
:1
Differenctial
ratio
Gear detection 4/5
Gear ratio
1,26
3
1,00
4
1,73
2
2,56
1
0,82
5
0,00
6
The fourth mode increases the gear counting by each pulse received
on a white input. Set in which edge the count should be increased
(default: falling edge). Configure an input as “Gear Detection” and
connect the device that will send the pulse to increase the counting.
This mode cannot detect downshifts and requires the 2-step to be
used to reset the counter; therefore it is best suited for drag race cars.
Gear detection 2/5
Analog Sensor
RPM drop
By wheel speed
or driveshaft
Gear shift
based output
By input signal
Detection type
Gear detection 3/5
White 1: O2 sensor #1
Selecione a entrada desejada
None
White 2: 2-step
White 3: Air Conditioning
White 4: Oil pressure
