What can I do to the existing ECU for better performance if I do not want to change it to aftermarket ECU?

 

Nothing.

You can buy modified stock ecu's from M2 or Pettit. I'm not sure if they will work in your car (Malaysia). What year is your FD?

 

You replace it with an aftermarket engine management system and get it tuned properly, or you take your chances with your stock one and risk replacing your engine.

The question should be how much of a gambling man are you?

 

Power FC and Commander is the way to go...

 

rynberg,

Mine is a 94 model. The workshop that I wanted to go to is good at analysing what can be done to the stock ECU and do the modification accordingly. According to him is that the manufaturer has some reseve in the stock ECU and what he can do is to maximise those reserve to get the extra HP out from the car. He said that the aftermarket works the same way but just that the aftermarket has more room and setting for mods..... Make sense to me, but my question is how true is it?

 

anyone????

 

I'd say do your best to keep boost @ 10 lbs and you are pretty much open to anything (except maybe midpipe, and you might want to add better ignition)

 

Well, how would they do that? There are "reserves" built into the stock ECU, sure...its not tuned for the bleeding edge. However, there is no way to go in and tune that in any way without doing an upgrade like M2 or Pettit do. The maps in question are programmed into the on-board ROM of the CPU and an additional external EPROM. These are not reprogrammable parts! The aftermarket upgrades have to desolder both parts. The EPROM is replaced with a new one that has different stuff programmed to it, and the CPU is mounted to a daughter board that has circuitry that accesses an additional EPROM (also on the daughter board) instead of the on-board internal ROM. There is simply no other way to monkey with the stock ECU maps.

jds

 

breau C,

YOu are right, the workshop is putting a "piggy back" ECU and then program it to run any mods that we are palnning to do, its not as good as the M2 but it will be better than stock.

Right now I ahve a choice between the "piggy back" ECU or Mine ECU.

A friend of mine has done the "piggy back" ECU upgrade but his is not an FD but a 300ZX. According to him is that his car runs better and has more torgue now.