Don't run Cobb OTS tune, they are garbage.

 

This link should get you started:

Buying a JDM Engine? Here are the differences between the EJ20G, EJ20K, and EJ205.

If you are looking for information about the newer JDM Engines, 2001+ please check out this POST NOTE: As of January 2021 we are longer wiring Version 1 through 6 engine swaps. Customers have had problems not only getting the swap going but also keeping them running due to harness condition...

www.iwireservices.com

EJ205/EJ207/EJ20G Engine Specifications And Review on MotorReviewer.com

The major parameters of EJ205/EJ207/EJ20G Engine - bore/stroke, power and torque, oil specs and capacity, the main problems and advices to prevent them.

www.motorreviewer.com

EJ207 Info - NASIOC

EJ207 Info Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

forums.nasioc.com

The JDM EJ207 engines are vastly different with varying spec between production years compared to USDM EJ205 engines. All JDM WRX and WRX STi engines have a 2.0L displacement, but receive the model designation of EJ20K, EJ207, etc.. Differences include everything from forged pistons, variable valve control (AVCS), twin scroll turbo set-ups, and differences in connecting rods and crankshaft coating. I believe that ECU tuning can all be achieved via USDM MY02 and up with wire harness merging and then open source tuning tuning via Cobb products. Iwire, from what I've read and been informed, of can merge your stock harness per spec or sell you a completed harness and send it to you. These links are just general overviews of engine specs and should give you a good place to start. Hope this helps.

 

Thank you for the replies. The cobb tune is going to be a baseline to get things moving.

I'm really hoping to just find a wrecked vehicle that I can salvage everything I need from.

 

Thank you, this is great information!

And I know OTS maps aren't great, but it will just be a starting point before I can get it professionally tuned.

 

Thank you, this is great information!

And I know OTS maps aren't great, but it will just be a starting point before I can get it professionally tuned.

Save the money. Cobb is pretty pricey for what they are asking you can actually go get a real tune. You can buy a usdm or jdm engine and use a usdm ecu but you will mostly have to get it tune and it is well worth it! Idk where you located but find a Subaru shop and try asking them some questions. You will need iWire unless you plan to merge both harness together, it could be a pain.

 

You don't need an accessport to tune the car. It's just throwing money down the drain.

 

recommendation: go to copart auction sites and just wait for a good donor... seems you are ready to go down this long and difficult road so i think a cheap auction car is a better gamble...

 

Trueeeeeeeee. I should have done that when I did my swap ;/

 

I just checked out the copart site and already found a potential donor close by. Thanks for the tip!

 

good luck and be patient