Hi mate, it is possible to do so if you have an OBD cable and software.
I have seen Evo 4's running the TME turbo without a tune and run fine.
Being in WA I'm not really sure, maybe Tokyo Motorsport? http://www.tokyomotorsports.com.au/
As far as I was aware, especially if the tuners in Perth are using Ecuflash, you need an Evo 5 ECU or better to enable tuning. The Evo 4 ecu isnt readily flashable ... Mike
I failed to mention that it's harder to flash Evo 4 ecu's sorry.
Yes, you can flash an Evo 8, 4 plug ecu. I'm using one...
I thought an auspec 8 ecu was 3 plug?