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03-09-2010, 01:17 AM | #1 |
Scooby Newbie
Member#: 235077
Join Date: Jan 2010
Chapter/Region:
MAIC
Location: Salisbury
Vehicle:2005 WRX EJ257 pearl blue |
05 automatic WRX. Just Bought 05 2.5 sti and 05 sti ecu.
what problems will i run into installing a 2.5sti<US.motor> on a 05 automatic wrx. i have 05 sti ecu. a cobb tuner getting warranty work done.<will having cobb help with install.
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03-10-2010, 11:17 PM | #2 |
Scooby Specialist
Member#: 48377
Join Date: Nov 2003
Chapter/Region:
MWSOC
Location: "They eat fish soaked in lye"
Vehicle:1996 Gutted, built XP class Impreza L |
If you basically have Cobb do the swap for you there probably won't be any problems at all. They are competent at their work.
If you are doing the swap yourself there is a lot more than the engine and ecu that you will need. |
03-10-2010, 11:28 PM | #3 |
Scooby Newbie
Member#: 235077
Join Date: Jan 2010
Chapter/Region:
MAIC
Location: Salisbury
Vehicle:2005 WRX EJ257 pearl blue |
by cobb i mean cobb tuner.
i have a 2.5sti on way with a automatic...i want to know if the engine will mate ok..please no jokes..if so ill keep auto. and not buy 5-speed.i have sti ecu also.
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03-11-2010, 04:14 PM | #4 |
Scooby Specialist
Member#: 3362
Join Date: Dec 2000
Location: Central NJ
Vehicle:2001 I've wired a Few cars in my day |
The STi ECU will not plug into the 05 WRX harness.
Z |
03-11-2010, 04:45 PM | #5 |
Scooby Newbie
Member#: 192052
Join Date: Oct 2008
Chapter/Region:
NWIC
Vehicle:2004 Sti swapd wagon Forest Green |
Ya man you also need to sourse an Sti engine harness and the wrx usdm auto 4eat isn't going to hold up very well unless you baby it or have some tranny work done. Usdm 5spd with jdm 5speed or 6speed parts are strong. Or you can go with a usdm 6 speed (will need rear diff and dccd controls and sensors) or older version jdm 5speed Sti tranny.
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03-11-2010, 11:04 PM | #6 |
Scooby Guru
Member#: 149262
Join Date: May 2007
Chapter/Region:
MWSOC
Location: Grand Rapids MI
Vehicle:03WR rallycarFXTleg PrimerGrey |
Please go 6 speed!!
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03-12-2010, 01:25 AM | #7 | |
Scooby Guru
Member#: 105814
Join Date: Jan 2006
Chapter/Region:
NWIC
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Quote:
To the OP: yes the 4eat will mate up with the sti motor no problem. Try pm'ing RiftsWRX here on nasioc. He did the swap. |
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03-12-2010, 09:30 AM | #8 |
Scooby Guru
Member#: 159682
Join Date: Sep 2007
Chapter/Region:
NESIC
Location: Maine
Vehicle:1995 WRX 2015 F150 |
You're screwed. It won't work. The sti ecu can't run an automatic. It'll bolt to the trans fine though.
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03-12-2010, 06:36 PM | #9 |
Scooby Newbie
Member#: 192052
Join Date: Oct 2008
Chapter/Region:
NWIC
Vehicle:2004 Sti swapd wagon Forest Green |
Pm me if you decide to go with the 4eat I have a extra tranny computer and wiring to go that route. Also there is a sweet valve body mod that can be done to the 4eat.
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03-12-2010, 07:47 PM | #10 |
Scooby Specialist
Member#: 118389
Join Date: Jun 2006
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the sti engine (i am assuming full sti longblock) will work fine with your stock 05 wrx ecu, harness, and 4eat. You probably will not be able to run the AVCS for the sti engine. If you want to consider using an sti ecu, you should have gone the direction of JDM.
JDM sti engine, JDM sti ecu + harness, may be able to work with your 4eat... but i don't think many people have tried this before. I have done a similar build... have an ej257 built sb with sti cosworth heads on an 04 wrx with full ipt 4eat. Not currently running AVCS but i'm looking for options on how to make that work... not that i have to. You may want to just save yourself the headache and do a hybrid build (i.e. sti shortblock with wrx heads). Then you won't have to worry about AVCS. That would probably work best with a 4eat. You would keep your stock wiring harness and ecu. No need for the STI one. |
03-12-2010, 07:49 PM | #11 | |
Scooby Specialist
Member#: 118389
Join Date: Jun 2006
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