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It's very simple
Yuor dealing with a factory ECU by Denso that's in effect past it's used by date.
but having said that.
A microtech LT10 or what every model is out now. Is a imporvement, but you also loose out.
Lower end aftermarket ECU's are not as good with Cold idel startup or the like.
BUt there are many new models out for a fraction more that are better.
They run more like a a full decent ECU.
Car ECU's have not really advanced too far in there mapping.
They just got a bit faster. The big difference and it's seen in the GD1021 to Gd1022 and then the GE's both 4 and 6.
is the Add on's the extra bits they control.
Even now you find cars 95% of anything goes into them. But the running of the engine has not hcanged dramaticly.
For economey your best bet is to have ECU with closed loop option and Tune it on that.
So you have ECU aiming for a perfect 14.7 to 1 ratio on light cruise. It makes a massive difference on highway compared to one with out. BUt you will only see it long term.
Alot of economey in ECU's is from removal of saftey aspects.
Overfeul for both sudden excelleration and Turbo cooling effect.
For example.
On - stock 10PSI - rear turbine - no colour
On a Unichip - piggyback give it a hit - minor colour 13psi
Microtech - more tuned up - after any decent drive mild or light it's RED glow.
all because extra fuel used to help keep it cooler and less advanced timming has been removed.
I had woos' chip in one - car it was fine it was 90% stock.
It's a choice thing. Of what you want to achive.
if your going to add things - you can't got past a aftermarket ECU.
dollar for dollar it's the best thing.
Especially today at the low cost of decent ones with such options of aux inputs and outputs.
you dont' have to spend big dollars. 10 years agoI went unichip because Motec was over $6000 and cheapest was LT8 at $2200 installed.
I did LT8 at $1200 two year ago.
I did Adaptronic which IMO is one of the BEST. I can't get enough of the thigns you can add and do to it. I admit a bit more A Haltech has it covered but IMO it was not worth it.
It cost $1400 installed.
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