2008 Impreza engine and drive train swap

[Sally The Subaru]

Hi, I have a 2008 base model Impreza with a EL15 and manual FWD.

I have found an EJ20 manual box all axles and rear diff from an Impreza S-GT. Will this bolt onto my chassis with the current sub frame?

 

Engine wise I wanted to get an EJ257 but all the ones available are NZD$4000. I also looked at the much cheaper EJ253 but that has a significantly lower power output and is non-turbo. I also am considering a turbo EJ20 to emulate the S-GT, but ultimately want the built to be on-par with the STI. Also have had trouble finding an ECU for these engines except the EJ20 ECU which would come with the gearbox.

Is there anything I have over looked since I basically know spoob all or if anyone has done something similar is there are other parts I need for this or a list of parts you used that would be greatly appreciated.

Thanks, Harrison.

 

 

[el_freddo]

G’day Harrison, 

What you’re aiming to achieve is not for the faint hearted. This is a project for sure, and you’ll experience many ups with some very low downs - to the point you’ll be ready to burn it. 

An aftermarket engine management system could be the easiest way to go if you’re wanting to drop a turbo engine in it. Otherwise learn how to read multiple wiring diagrams and cut down the turbo management loom yourself - or find someone to foot for you. 

The S-GT also an impreza of the same era? Asking because if it is, get one that’s written off and basically do a body swap - as in swap all the drive train and wiring in yours for the donor’s. 

If you’re using factory wiring cut down, you’ll have to pull the dashboard out. Aftermarket management should be able to be done without pulling the dashboard. You will need a tuner to dial everything in to ensure the engine doesn’t self destruct with the aftermarket management. 

AWD stuff I can’t see any issues with swapping the rear cradle etc. Someone more in the know than me will hopefully correct me if I’m wrong. I didn’t realise Subaru produced front wheel drive vehicles this late in the piece. Are you sure it’s not AWD? 

Cheers 

Bennie