Hi there, my name is Hakan, and I make these units.
Let me try and explain maxidisplay`s details for you…
Sorry for about my English
You can see all details,pictures,videos and LCD size with technical info here:
It’s in Turkish, though you could use Google translate if you like, or Godless Commie may be able to help us again.
This device shows to you important engine data on the LCD display, such as:
Fuel pressure, etc..
Its works really fast, because it communicates directly with the sensors
The unit has two main components:
1- main unit
2- LCD screen + buttons + warning LEDs
This is not an off the shelf device
I fabricate the unit on request, per desired sensor inputs.
The way this device works:
Input filter and microcontroller for calculating values and alarms, also for displaying data on the LCD screen, and finally serial output for data logging.
(maxidisplay includes input filter + amplifier + microcontroller and LCD screen)
Map sensor input:
MAP SENSOR --> ( MAP FILTER + MICROCONTROLLER + LCD)
RPM SIGNAL --> (RPM FILTER + MICROCONTROLLER + LCD)
EGT SENSOR --> (EGT AMPLIFIER + MICROCONTROLLER + LCD)
(WIDEBAND SENSOR + CONTROL CIRCUIT) --> (INPUT FILTER + MICROCONTROLLER + LCD)
Just an O2 sensor is not enough, you must have a complete wideband device like AEM wideband or Innovate LC-1.
Here’s an example:
If you would like to display wideband AFR + EGT + RPM + oil pressure + water temp + battery volts + turbo boost
There are a total 7 inputs in this case . (Maximum 8 inputs are available, EGT comes standard)
Wideband AFR: Wideband O2 sensor cannot be connected directly to the unit.
You must have a complete wideband device like AEM wideband or Innovate LC-1.
RPM: RPM signal can be taken from the ECU connector or the back of the tachometer at the dashboard sockets.
RPM input has cylinder select and shiftlight setting functions within the setup menu.
BATTERY VOLTAGE: That is easy, just hook into any +12 Volt source.
WATER TEMP: Water and Oil temp sensors come with the kit, there is no extra charge for these sensors (that is, if you need them in your setup.
These sensors are calibrated to the unit, and must be used if Water and Oil temps are to be displayed.
TPS: That is easy, too. Just splice into the TPS output from the sensor – or the input from the sensor to the ECU.
A one-time calibration needs to be done for the TPS input in the setup menu.
IAT: A GM IAT sensor is used for this function. This sensor does not come with the kit, you can buy it from me, or source it yourself. Please ask me which sensors are compatible with the unit.
OIL PRESSURE: Again, this sensor does not come with the kit, you can buy it from me, or source it yourself.
Some customers want to use an AEM oil pressure sensor, and that’s possible (I need details for calibration)
TURBO MAP SENSOR: If the car already has a MAP sensor we can use it (I need map sensor details and part numbers)
EGT: You need an EGT sensor. I can supply it or you can buy it yourself.
Please ask for other inputs.
I try and use as many stock sensors that are already on the car as possible in the name of minimizing cost.
SERIAL OUT: Serial out cable and software is optional, and costs just 15$
(Maxidisplay has a serial out port, you can use windows hyperterminal program too, if you so choose.)
If you want the 9 pin serial cable and Maxidata windows software, that will be extra.
20 frame per second data out. (20 AFR data, 20 EGT, 20 TPS data, 20 RPM per second, simultaneously)
OPTIONAL RELAY OUT: optional, just 35$
If you want external controls, water injection , Qtec exhaust control , fan control, etc
In this case, serial out is disabled, and that port is used for the relay out function. (The relay comes with the kit in this case)
I can preprogram the unit to your specs, for whatever you need. It’s done through the setup menu.
over %70 TPS + over 6200 RPM + over 1 bar boost = energize water injection relay
I generally use two type of LCD displays
“big LCD” and “huge LCD”
I also have what I call a “normal LCD” and “24x2 red” LCD display for special requests.
The system has alarm functions (LED lights up and alarm buzzer sounds)
The red LED for extreme cases like high EGT, low oil pressure, etc.
The blue LED is used as a shiftlight.
The yellow LED can be used, if you like, as a low fuel warning, or minimum oil temp degree.
For instance, let’s say you set oil temp alarm level for 122F
Yellow LED will remain on as long as oil temp is under 122F, and once it warms up past that point, it will go off…
Of course, all alarm values, such as EGT temp, oil pressure, shiftlight point, water temp levels, etc. are user adjustable.