Vehicle Lineup & Specs GT-R (R35) FAIRLADY Z (Z34) FAIRLADY Z (Z33 VQ35HR) LEGACY SI-DRIVE LANCER EVOLUTION WAGON

< ECU Evolution >

The first generation of automotive ECU's were 8-bit, and relatively simple.  However modern vehicles now use advanced 32-bit processors, with over ten times the data and many more parameters.  The introduction of automatic gearboxes and computer controlled suspension, as well as features such as the CAN immobilizer (Controller Area Network) make tuning these ECU's a very difficult and time consuming process.

For accurate tuning it is important to control the main ECU, as piggy back electronics don’t take into account other factors.  For example a SLD (Speed limiter Device) can be installed to delimit a vehicles top speed.  The unit works by intercepting and modifying the signal from the speed sensor to the ECU.  So, for example if you're travelling at 180km/h the ECU will think you're still traveling at 150km/h.  However, what about the other functions that rely on the speed signal, such as the power steering?  These will not function as designed, since the data has been modified and is now incorrect.

< ”Perfect Tuning from Mr. Niikura ” >

For perfect tuning it is necessary to modify the main computer.  This is true whether you want to increase or decrease a vehicles performance. Over time a vehicle evolves.  There is a tendency to assume that the content of the ECU doesn’t change, but this isn't the case.  Both the ECU and the car evolve together.
If a vehicle is to be used as a track car at a fixed temperature and air pressure, then it may be possible to use an interchangeable computer.  Of course this isn't realistic, as a vehicle will be driven in various conditions throughout the seasons.  The only solution is to take the main computer and tune it.  This is what we consider to be "Perfect".

It has been said that replacement ECU's were growing in popularity, but this isn't the case.

Mine's will always strive for perfection when tuning the main ECU, and seek to tune the ECU's of the next generation of vehicles such as the new GT-R, 350Z and Lancer Evolution.  With these new vehicles comes new technology, such as ETC (Electronic Throttle Control) and Variable Valve Timing.

< The reality of computer tuning, and what we aim for >

There is a tendency when tuning to only focus on how much extra power and torque can be gained.  However, tuning is like creating music or a painting.  Changing the fuelling, timing, boost pressure etc etc gives way to infinite combinations.  No two ECU's are the same.
The ultimate goal is to create a better "picture", or better "music" with the combinations available.  Although there is a tendency to seek more power forcefully, we have to remember that there are reasons for the limitations imposed by the manufacturer.  If we ignore these limitations and only seek more power, then the cars durability and drivability will be compromised.
As a tuner we are proud to be able to gain the maximum power, torque and drivability within the boundaries imposed upon us, whilst maintaining the self learning function.
Many VX-ROM users like to change the ECU when they change their vehicle.  For them the VX-ROM makes the car special.  They love Mine's tuning and want the same level of tune on their new vehicle as their old.  In a way it's like enjoying a nice concert or buying a nice painting by the same artist.
We believe that a good tuner listens to a customer’s requirement, and provides a tune to fulfil their needs.

< In search of Power >

One of the main purposes of computer tuning is to increase the power output of an engine.
 It is often said that by changing the computer we obtain more horsepower, but it is not just the power that matters.
Of course initially we seek more power, but this is just the beginning of the process.  It takes a few days to tune a car for performance gain with the use of a data logger, and once this is complete then the fine tuning begins.  A tuner improves the tune for response and drivability, and finally creates a work of art or a tuned computer.  This artistic work is our endless goal.

< In search of Speed >

When tuning the computer, whether it is naturally aspirated or turbo charged, we tend to ask only one thing.  How fast will it be?
This is not always appropriate.  For example let’s look at an example of an up-to-date electronic throttle.  This is designed by the manufacturer to improve throttle response, but if we in turn increase the response it doesn't necessarily benefit the driver.  We may degrade the drivability and fuel efficiency as well as the handling.  This breaks the balance, and can make the car tiring to drive. 
As some drivers might comment, it's not that the car is actually faster, it just appears to be faster. The electronic throttle is one of the new technologies we are focusing on.