re map ECU

How would i go about doing this i want to re map the ecu/ stand alone ECU....

If I knew how, I woulda' already done it.
'Don't know just how flexible the tuning is on this ECU.  It seems even the AM has, for the most part, shyed away form that aspect of the car.  I figure that something is scaring them off.
 
 

If i was to get a Greddy BCC will this improve my band accross the ECU? my question came out wrong....i just want to improve the ECU or make better all around. 

 
I know what you mean.  I would too if I could, but don't know of anyone doing that successfully at the moment.  I wouldn't mind more power, or quicker reaction in mine either.
As I'd said, Reactive Racing started a link on another forum claiming they have a working piggy-back prototype that fools the OE ECU and overrides it somehow, but it has yet to be proven from what I know.  They are using some local forum members cars as test beds (guinea pigs) right now.
If I'm notified that it works, I will post....
 
Well, here!  See for yourself... http://www.mazda3forums.com/index.php?topic=96916.0

i was reading that thread...interesting...that sucks that our ECU's are so dam smart and 500$ for ECU is just too much i was expecting around 200-300 at the most like the SAFC II. but i guess if i get SAFC II it will not work.

 
Compared to others I've seen, and I am by far no expert on the subject, some run up to $1500 and higher!!!
$500 is relatively cheap, particularly if it works as advertised.
 
 
 

....don't know maybe those numbers look big to me since i just spent some money on books...(college)