BMW E36 Guide
BMW E36 (1990 - 1999)
RPM
Use the wire connected to the instrument cluster #20, black wire. Also available on the round diagnostic connector at the back of the engine compartment (black wire, Pin #1)
RaceCapture/Pro Timer RPM Configuration
- Timer Mode: RPM
- Timer Speed: Medium
- Pulse Per Revolution: 3
Engine Temperature
In research
Fuel Level
In research
(Needs verification)
- 0 ohms empty
- ?? ohms 1/4
- ?? ohms 1/2
- ?? ohms 3/4
- 260 ohms full
Oil Pressure
Recommend a dedicated 10 bar / 145 PSI 0.5-4.5v pressure sensor. Pressure Sensor
Road speed (differential speed sensor based)
This calculates gear and speed based on the differential speed sensor. Assumes engine RPM is connected to the first RPM input.
setTickRate(10) --10Hz
--virtual channels
--addChannel("name",SR,prec,min,max,"unit")
speeddiff_id = addChannel("Speed_",10,0,0,160,"MPH")
gear_id = addChannel("Gear_",5,0,0,5,"gear")
--global constants
--edit these to match your car
first = 4.20
second = 2.49
third = 1.66
fourth = 1.24
fifth = 1.00
final = 3.46
tirediameter = 24.7
--global variables
rpm = 0
rpm_diff = 0
speed = 0
function updateSpeedDiff()
rpm_diff = getTimerRpm(1)
speed = rpm_diff*tirediameter*0.002975
speed = speed + 0.5 -- round because 0 prec. truncates
setChannel(speeddiff_id, speed)
end
function updateGear()
rpm = getTimerRpm(0)
local gearErr = 0.15
local gear = 0
if speed > 2 then
ratio = rpm/(rpm_diff*final)
if ((first - ratio)^2) < (gearErr^2) then gear = 1 end
if ((second - ratio)^2) < (gearErr^2) then gear = 2 end
if ((third - ratio)^2) < (gearErr^2) then gear = 3 end
if ((fourth - ratio)^2) < (gearErr^2) then gear = 4 end
if ((fifth - ratio)^2) < (gearErr^2) then gear = 5 end
end
setChannel(gear_id, gear)
end
function onTick()
updateSpeedDiff()
updateGear()
end
