Map ECU

[Gaz Walker]

For anyone who has ever installed an aftermarket turbocharger system on a naturally aspirated car, upgraded the turbos and/or fuel system on a turbocharged car, or wanted to remove the restrictive MAF meter on any car, the MAP ECU (Manifold Absolute Pressure Electronic Control Unit) is for you! This piggy-back system is similar in function and design to the super-popular HKS VPC (now discontinued) however, the MAP ECU takes it one step further by allowing end-user programmability via Windows-based software. The purpose of the MAP ECU is to mimic the voltage or frequency output patterns of the factory Mass Air Flow(hotwire) or Karman-Vortex meter but uses RPM and Manifold Pressure to make its calculations rather than airflow. Basic setup takes only a few minutes, and allows the user to custom tailor the MAP ECU to work with almost any automotive system on the planet. The user can set the number of cylinders (1-16), type of air metering system utilized (Karman-Vortex or Hotwire), throttle position hi/low voltage range, throttle or MAP based enrichment, and the type of oxygen sensor utilized (OEM or wideband).

The powerful yet easy-to-use-software installs in any Windows operating system, and communicates with the MAP ECU from your laptop via a serial cable (supplied). The MAP ECU software allows the user to monitor MAP ECU inputs and outputs in real-time, make real-time adjustments to MAP ECU tables and parameters, manipulate data in 2D and 3D formats, and log critical ECU data for evaluation at a later time. Once the mapping is completed, the laptop can be removed and the unit stores the data in permanent memory. Of course, with the laptop connected you will find a wealth of information available to you while the vehicle is running. The MAP ECU operates as a “piggy-back” control unit, allowing the user to maintain factory ECU control of the primary functions, but modify the fuel mapping parameters to suit larger fuel injectors, different camshafts, upgraded turbochargers, and forced induction conversions. What this means to the novice tuner is no more lost sleep trying to get the car to start or idle correctly with a full stand-alone engine management system. Most importantly, the MAP ECU does what other similar units on the market cannot do: convert the factory Mass Air Flow (MAF) or Karman-Vortex (VKF) signal into a speed-density (or manifold pressure) based signal, allowing the user to completely remove the factory air metering system. This adjustability means that the MAP ECU has coverage for over 90% of current production cars on the road today. One of the most powerful features of the MAP ECU is its ability to self-learn from factory MAF or Karman-Vortex meters. This feature means you can build a base fuel map using factory components then install aftermarket components and adjust the mapping to suit your needs. This makes the MAP ECU perfect for OBDII-equipped cars, since you can build a base map using the OEM sensors, and then remove the sensors so that no fault codes are tripped in the process. The MAP ECU basically becomes invisible to the factory ECU, but lets you remove the air meter and have all the advantages of an adjustable fuel curve by modifying the airflow input.

Some other features of the MAP ECU include a wide band oxygen sensor input for monitoring and logging the air/fuel ratio in real-time (a Bosch LSM-II sensor is available separately), TPS input for throttle-based fuel enrichment, and dual pressure switch circuits to activate auxiliary devices according to manifold pressure. The pressure switch circuits are perfect for activating additional fuel pumps, NOS systems, or intercooler spray bar systems. A basic installation of the MAP ECU requires connection to only four wires at the factory ECU (+12v Ignition, Ground, RPM input, and Air Flow Meter input to the ECU) making installation easy for even the inexperienced installer. The MAP ECU features a built-in -12 psi to +30 psi pressure sensor with a customizable pressure scale and a 0-8000 RPM engine speed scale. The basic kit includes the MAP ECU, an un-terminated 3’ universal wiring harness, air temperature sensor, serial cable, installation and tuning manual, and MAP ECU software on CD ROM.

New! MAP ECU Version 2.2 incorporates a wealth of upgrades over the previous Version 2.1 firmware/software package. New Dashboard screen provides the tuner with more information than previously available, and includes a miniature scaled version of the MAP ECU Table showing the current load point. New ECU functions include complete NOS system control with NOS solenoid activation by RPM and throttle position, and zoned TPS and MAP enrichment by throttle position and/or RPM. We have also incorporated a password function to protect the MAP ECU from prying eyes for those who wish to “set it and forget it”. With all these functions now built-in the unit, it’s hard to find a comparison with similar so-called fuel controllers. Constant improvement is what makes the MAP ECU a hands down winner!

Price - £699 (special limited offer)

Ideal for VVTi applications.

[Gaz Walker]

Will the MAP ECU work on my car?
The MAP ECU will work on virtually any vehicle that utilizes a Mass Air Flow, Flap Style, Karman Vortex, or Manifold Pressure air metering system. This comprises approximately 90% of the vehicles currently on the road. It will even work on later model OBD-II vehicles that use an air meter built into the airbox. You can keep the meter in place, but intercept the signal to the ECU and provide your own mapping. The MAP ECU also works on the later model Bosch Motronic cars from Germany. Currently, the MAP ECU has been installed with great success on the Toyota Supra Non Turbo, Supra Twin Turbo, Supra Turbo 7MGTE, Mitsubishi 3000GT, Eclipse GS-T, Eagle Talon, EVO VII, EVO VIII, and Porsche 911 Turbo.

What does the MAP ECU do?
Every vehicle has some type of air metering system designed to let the engine computer know how much air is being taken into the engine at any given moment. The computer then calculates the volume of fuel that is required to maintain the ideal air/fuel ratio and opens the fuel injectors accordingly. There are two types of air metering systems, Mass Air Flow and Karman Vortex. In a Mass Air Flow system (sometimes called hotwire), the incoming air is passed over an exposed platinum wire called a hotwire. This wire is maintained at a constant resistance/temperature using a 5 volt source. When incoming air passes over the hotwire, the resistance changes and the output voltage varies. Usually, the voltage is lower at idle and low-load (0-1 volt) and higher at full throttle (4-5 volts). In a Karman Vortex system, the incoming air is passed through a grate which creates a vortex (spinning air) on the other side. An electronic “eye” detects the frequency by which the vortexes are created, the higher the volume of incoming air, the more vortexes are created. This signal is then output as a frequency, usually varying from 20 Hz to 3000 Hz. The problem with both systems is that they must be placed directly in the path of incoming air to accurately measure the amount of fuel needed. As we all know, placing any object in the path of incoming air can slow it down and restrict its flow, robbing you of both horsepower and throttle response. The MAP ECU is designed to provide a signal to the factory ECU that mimics the signal of the air metering system, but is based on vacuum/pressure rather than actual airflow. This allows the installer to remove the air meter from the path of incoming air, and therefore increases horsepower and torque throughout the RPM range. In forced induction turbo applications, this makes installation of larger turbochargers and larger fuel injectors possible by reducing the signal to the ECU to compensate for the larger injector size.


How does the MAP ECU work?
The MAP ECU is basically a blank graph that can be programmed to mimic almost any air metering system used today. The scale of the graph is from -10 to +30 psi of pressure and from 0 to 8000 RPM. You input the values that best correspond to your engines particular requirements. If you have no base map to start with, you can always use the MAP ECU “self-learn” function to build a starting map using the output values of your factory air meter. Remember that the MAP ECU is not like other fuel computers on the market that simply add or subtract a set percentage from the meter signal for tuning purposes. The MAP ECU is a user-built map all the way from idle to redline that tells the ECU how much air is coming into the engine at that moment in a form that mimics the factory air metering system.


Does the MAP ECU control ignition timing?
The MAP ECU is designed to provide extended fuel mapping in forced induction applications and allow the end-user to remove the restrictive air meter from the air intake path. Ignition timing is controlled within the factory ECU and is usually set by a number of different parameters. The MAP ECU has no ability to control internal ECU functions such as ignition timing. If ignition timing control was possible with the MAP ECU, the ease of end-user installation would be removed and the unit would have to be installed by a professional engine tuner with the proper diagnostic equipment to prevent engine damage. Currently, the MAP ECU is designed to fit the needs of the end-user by providing for an easy installation with minimal downtime. This means you spend less time messing around with the computer and more time driving your vehicle!


What happens if my car redlines above 8000 RPM, but the MAP ECU only provides for 8000 RPM on the graph?
The MAP ECU was designed to cope with higher RPM levels, and will utilize the last value in the map above 8000 RPM. Most modern engines make peak power below this RPM level, and the need for detailed mapping should be reduced. However, as with any aftermarket fuel mapping system, care should be exercised when exceeding 8000 RPM.


What happens if my car runs more than 30 psi of boost pressure, but the MAP ECU only provides for 30 psi on the graph?
The MAP ECU was designed to cope with higher boost levels, and will utilize the last value in the map above 30 psi. However, at this boost level, extreme caution should be taken to avoid engine damage. Check all map settings on a chassis dyno with the proper wideband oxygen sensor equipment!



Will future software updates be available for the MAP ECU?
Software updates are free of charge to MAP ECU customers, and are available on the PHR website as soon as they are released. Newer versions of software may include added functions and bug fixes for previous versions, and should always be installed when available. Software updates will not affect your maps or tuning settings. Firmware updates will include added features that are not currently enabled, however, the MAP ECU must be returned to PHR for firmware updates.

[supra800]

Apexi FC + Commander ECU ( Maping ).

May someone help me by getting me the coding (Program),the Parts on the Supra 95 bellow.

the Parts on my car Bellow:

HKS GT 2528 Turbo Kit
Trust Inter Cooler 3 row
Trust Oil cooler
HKS Fuel Line
Fuel Regalater
1000cc Injecters
HKS 272 camshift
HKS Cam Gear
Aluminume Raditor

If you need more info ask me.

What you think the coding should be?

If you can help late me know, I will pay for it.


i need the right coding to get the right Power.

Any one can tell me or help to Program the Apexi FC + Commander ECU

Thx

[Thorin]

Holy thread resurrection batman! You might get a better response posting a new thread in the Tech section rather than replying to a completely irrelevant one in a trader section.

edit: I'm sure Gaz will sell you a MAP ECU if you want one though.

[Gaz Walker]

From your message I am guessing you want a Apexi Power FC mapped rather than a Map ECU? We don't do mapping anyway so your best off speaking to Turbofit or Thor about that. Its a bit of a hike from the UAE though!

I am sure you must have a specialist in the UAE that has the Power FC software?

Gaz.