I am not an engineer, but was frustrated by no answer to this question, and am readily open to being corrected. A little research has led to the following answer. Caveat Emptor.
ECU = Engine Control Unit, an electronic component of modern engine management, tweaking performance according to a series of variables which can boost power, for instance, among other things. Basically a small computer with precise instructions on how an engine should run, and which can receive different sets of instructions, as if you went from Windows XP to Windows Vista, or from Mac Tiger to Mac Leopard, for instance, to use an office computer analogy, and then all kinds of changes appear on the screen and behind it.
So an upgrade to an ECU will affect the vital statistics of an engine in different ways, depending on the intention of the "upgrade". I surmise it is often used to boost engine power beyond what the manufacturer intended, at the price of higher gas consumption, faster engine wear, and generally higher risk to the driver from potential loss of control (those infamous "single vehicle accidents") due to the rest of the car not being designed for the real world consequences of that extra power, i.e., higher speed vs. imprecise steering, suspension too soft, brakes not adequate, tires not 'sticky' enough, etc.) Very attractive however when you think that by simply downloading some software into your car's computer it becomes more powerful. Amazing when you come to think of it.
It does appear that one can upgrade the Legnum ECU although it is a complicated process. There are videos on YouTube to walk one through the process.
Microtech. Period.
I am not the expert, but an ECU upgrade can add 10-15 hp. Then upgrade your air filter, and intake Then upgrade your exhaust.
THE ECU ON A 93 HATCH IS UNDER THE CARPET BY THE PASSENGER DOOR WHERE YOUR RIGHT FOOT RESTS WHILE SITTINGIF YOU PULL UP THE CARPET ITS BOLTED TO THE SIDE OF THE CAR IF THE ECU IS FOR YOUR CAR JUST AN UPGRADE THAN IT SHOULD PLUG IN TO THE WIRTING HARNESS JUST FINE
Turbo or Supercharger + K-PRO chip for ECU + Full catback exhaust + headers +intake upgrade+ K-PRO tuning job.
You can start with Cold Air Intake, Then exhaust, then headers and ECU upgrade
What about the ecu?
ecu?
ecu?
yes the ecm and the ecu is the same thing. ecu stands for electronic control module and ecu stands for electronic control unit. they are both the same thing just ecm in canada and ecu in america.
There is not a single ECU sensor. There are dozens of sensors on this car that feed the ECU
polini would proberly be the best due to the fact you do not need the expensive ecu upgrade if your not on a budget then go for the malossi kit both can be purchased here http://www.adrenalin-pedstop.co.uk/