04 STi Engine into an 04 WRX?

rsmith2786 · 04-03-2008, 05:54 PM

I have been searching and searching but still cant find all of the info i need. It have a good grip on the transmission/drivetrain options and issues. When it comes to the motor i understand it will pretty much bolt right in but what i am still not so sure on is the wiring.

I see a lot of people use the WRX wiring, intake manifold, throttle body, and ecu. There are a few things i dont like about doing that but it seems maybe its the best way.

What i was wondering is if you could use all of the STi parts including the ECU and wiring harness to essentially have a complete stock STi powertrain but in a WRX chassis. Then you could take advantage of the STi valve control system too. I am sure there is a reason people aren't doing it this way but i cant seem to find it. I bet the info is already here but i am having one hell of a time finding it.

If anyone could explain, or better yet, post up a link that would be great.

Thanks!

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Prorex · 04-04-2008, 11:21 AM

Are you wanting to do just the motor? No trans.. etc..

rsmith2786 · 04-04-2008, 11:24 AM

I plan to do the whole powertrain but the tranny swap i have figured out.

I am basically wondering if i can use an STi ecu so that i am basically running a stock STi setup but in a wrx. Can i run the full STi harness, engine, and ecu or what needs to be done?

04-03-2008, 05:54 PM	#1
rsmith2786 Scooby Newbie Member#: 176412 Join Date: Apr 2008	04-05 STi Engine into an 05 WRX? I have been searching and searching but still cant find all of the info i need. It have a good grip on the transmission/drivetrain options and issues. When it comes to the motor i understand it will pretty much bolt right in but what i am still not so sure on is the wiring. I see a lot of people use the WRX wiring, intake manifold, throttle body, and ecu. There are a few things i dont like about doing that but it seems maybe its the best way. What i was wondering is if you could use all of the STi parts including the ECU and wiring harness to essentially have a complete stock STi powertrain but in a WRX chassis. Then you could take advantage of the STi valve control system too. I am sure there is a reason people aren't doing it this way but i cant seem to find it. I bet the info is already here but i am having one hell of a time finding it. If anyone could explain, or better yet, post up a link that would be great. Thanks! * Registered users of the site do not see these ads. Last edited by rsmith2786; 04-04-2008 at 12:08 AM.

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04-04-2008, 11:21 AM	#2
Prorex Scooby Newbie Member#: 176541 Join Date: Apr 2008 Location: MO Vehicle: 2002 Impreza WRX blue	Are you wanting to do just the motor? No trans.. etc..

04-04-2008, 11:24 AM	#3
rsmith2786 Scooby Newbie Member#: 176412 Join Date: Apr 2008	I plan to do the whole powertrain but the tranny swap i have figured out. I am basically wondering if i can use an STi ecu so that i am basically running a stock STi setup but in a wrx. Can i run the full STi harness, engine, and ecu or what needs to be done?