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Jez77 · 09-08-2017, 11:05 PM

Another aussie Copen owner here.

I assume you are already on the Copenworld forum (think I've seen the car on it).
Aussie Copens are the same engine and ECU as the Jap models.
Both the Aussie and Jap cars didn't adopt OB2 until 2006 and even that was only for new models so they could have continued selling them unchanged after that if Daihatsu hadn't pull out of OZ.
UK turbo ones were converted to OB2 but it's not as simple as an ECU change there was some other changes as well, fuel system was converted to return less for example.
It's better to stick with the Aussie system anyway as there are more parts available from Japan.
We can use the D-Sport ECU for example where the UK versions can't .
I had a Unichip piggyback system installed on mine and apart from the power and drivability improvements my fuel consumption on my usual spirited drive over the mountains dropped from 7.5l/100k to less that 6.5l/100k.
They are working pretty hard on the highway 4000rpm and on boost so economy will never be great even with such a small motor.

09-08-2017, 11:05 PM	#18 (permalink)
Jez77 EcoModding Lurker Join Date: Mar 2017 Location: Brisbane Australia Posts: 49 Thanks: 5 Thanked 5 Times in 4 Posts	Another aussie Copen owner here. I assume you are already on the Copenworld forum (think I've seen the car on it). Aussie Copens are the same engine and ECU as the Jap models. Both the Aussie and Jap cars didn't adopt OB2 until 2006 and even that was only for new models so they could have continued selling them unchanged after that if Daihatsu hadn't pull out of OZ. UK turbo ones were converted to OB2 but it's not as simple as an ECU change there was some other changes as well, fuel system was converted to return less for example. It's better to stick with the Aussie system anyway as there are more parts available from Japan. We can use the D-Sport ECU for example where the UK versions can't . I had a Unichip piggyback system installed on mine and apart from the power and drivability improvements my fuel consumption on my usual spirited drive over the mountains dropped from 7.5l/100k to less that 6.5l/100k. They are working pretty hard on the highway 4000rpm and on boost so economy will never be great even with such a small motor.