Custom Gauge on a LCD

[cranium]

I am looking into making a custom monitoring tool to plug into the ECU. I saw one thread on this, but they were more talking about re-programming the ECU. I just want to make some software to watch things like EGTs and water temp and oil pressure, etc. I plan to connect it to a laptop first, but eventually plug it into a small LCD with some custom software running on a RTOS like VxWorks.



My questions are:
Where is there a reliable map for the ECU (or any other data acquisition points)?
Does it update fast enough? (1/sec should be enough, I am only monitoring)
Is there a want for this? Would anyone buy it?

I am pretty good a SW (masters degree and all) and would make it customizable for what to display where, and make things bigger and more colorful as they approach limits the user would setup. Any suggestions, ideas or sensor help would be greatly appreciated. I will post my progress....

[djrez4]

Both HKs and Defi already make a system like this. HKS calls it CAMP and requires a separate LCD monitor and Defi sells an LCD monitor that attaches to their gauge control module.

Defi system

HKS CAMP

[cranium]

Those are pretty cool, but they require you to run more sensors. I was looking at taking advantage of the data already sent to the ECU, and specifically making it for the WRX.

Thanks for the links, though. They are definitely around the same ballpark that I would like to do (especially the HKS CAMP).

[Love4AWD]

if you want this and have the $$$$ buy the stock lcd for the skyline R34 and custom fit it for your dash and wiring

[cranium]

So after some research, it looks like I am going to start at the OBD-2 route and check what sensors the WRX has available and how often it updates. I should get my wire and sw on Monday. Provided it is the data I need, I'll start on the windows version of my sw next week.

If it is not...then I have to start looking at come ecu plugs...

[djrez4]

Sorry...completely forgot to link to the pinout diagram!! Here it is

http://www.ravensblade-impreza.com/m...ng/wrxpin.html

[Trypsin]

ECUTEK's Deltadash pulls quite a bit from the OBDII port. Check out thier site it gives a list.

[cranium]

Sweet...looks like I can do any of this data :

Coolant Temperature
Air Fuel Correction
Air Fuel Learning
Manifold Absolute Pressure
Engine Speed
Vehicle Speed
Ignition Timing
Intake Air Temperature
Mass Air Flow
Throttle Opening Angle
Rear O2 Sensor
Battery Voltage
Air Flow Sensor Voltage
Throttle Sensor Voltage
Fuel Injector Pulse Width
Knock Correction
Atmospheric Pressure
Manifold Relative Pressure
Fuel Level
Primary Wasetgate Duty Cycle
CPC Valve Duty
Tumble Valve Position Sensor Left
Tumble Valve Position Sensor Right
Idle Speed Control Valve Duty
Fuel Pump Duty
Air/Fuel Sensor Current
Air/Fuel Sensor Resistance
Air/Fuel Sensor Voltage
Rear O2 Heater Voltage
Air/Fuel Sensor Heater Current
Exhaust Gas Temperature

AT Vehicle ID
Test Mode Connector
Neutral Position Switch
Idle Switch
Ignition Switch
Power Steering Switch
Air Conditioning Switch
Starter Switch
Rear O2 Rich Signal
Knock Signal
Crank Position Sensor
Cam Position Sensor
Defogger Switch
Blower Switch
Interior Light Switch
Air-Con Compressor Signal
Radiator Fan Relay 1
Radiator Fan Relay 2
TGV Output
TGV Drive
Torque Control Signal 1
Torque Control Signal 2
Torque Permission Signal