Smiths 'Flight' Speedo:
https://www.caigauge.com/documents//product-instructions/spedometers/speedometers/pil042-460-435.pdf
I have the 0-140 Mph version..
(C) Circumference = Mark the tyre, roll the car forward exactly one wheel revolution and measure the distance
(WM) Wheel revs per mile = 63360 / circumference in inches
(C#) Calibration Number (pulses per mile) = wheel revs per mile/km * diff ratio * number of magnets/bolts
C = 70.25" (unloaded tyre - needs re-checking with the car weight on it)
WM = 63360 / 70.25 = 901.92
C# = 901.92 * 3.62 * 4 = 13,060 (013021 advised by GBS = 70.46" diameter)
Set Calibration:
- Press speedo button while turning on the ignition
- Release buton before needle returns to Zero - 'SET PPU' shown
- Release button after needle returns to Zero - 'DTS PPU' shown
- Press button to toggle mode - SET/DTS
'SET PPU' Mode - Manually input the number
- Press button for 2-3 seconds - current calibration number is shown
- Digits flash in turn for 2 seconds each
- Press button to increment flashing digit
- When all digits are set the whole number will flash - press button to finish
- 'DONE' displayed
- After 3 seconds 'SET PPU' displayed - setting is complete
- Turn off the ignition
'DTS PPU' Mode - Drive to set (& check sensor position)
- Press button for 2-3 seconds - display will show '*00000'
- Drive exactly one mile at constant speed - odometer will count the pulses
- Press button for 2-3 seconds - 'DONE' displayed
- After 3 seconds 'SET PPU' displayed - setting is complete
- Turn off the ignition
Smiths 'Flight' Tacho:
Number of cylinders = 4
Wasted Spark Ignition
Pulses per revolution (PPR) = 4
Switch settings:
sw1 = 1
sw2 = 0
sw3 = 1
sw4-7 = 0
sw8 = 1
Bespoke Custom Digital Speedo:
Functionality:
Speed 10ths of MPH,
30,50 & 70 optional speed warning,
0-60 speed with auto start on movement,
1/4 mile speed with auto start on movement,
2x Trip meters 10ths and 100ths of a mile.
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