Welcome to the North American Subaru Impreza Owners Club Monday December 11, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Subaru Conversions

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 08-23-2017, 02:23 PM   #1
Chad04STI
Scooby Newbie
 
Member#: 473280
Join Date: Aug 2017
Location: Union, Ky
Vehicle:
2004 Impreza STI
Silver

Default v8 ej207 in a 2004 Impreza STI

I just bought the long block to replace my blown ej257, I am looking to use the FULL 207 and I already know about the throttle by wire vs electronic, and cam senors. Am i able to grab the cam sensors off of the 257 heads? and what other problems will come up in this swap? Looking for people that have done this swap or are informed on the subject to respond. Not hate.
Update: I have a shop that is willing to do the swap still want to know what problems they will run into.
Engine purchased - https://www.jspecauto.com/engine_det...-and-down-pipe
* Registered users of the site do not see these ads.

Last edited by Chad04STI; 08-23-2017 at 08:17 PM.
Chad04STI is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-25-2017, 05:43 PM   #2
Seahawk
Scooby Specialist
 
Member#: 71665
Join Date: Oct 2004
Chapter/Region: South East
Location: Wilmington, NC
Vehicle:
1994 Impreza
White

Default

Version 8 is drive by cable, not DBW. No need to swap cam sensors or any sensors. Downpipe will need to be lengthened to meet your midpipe. Upstream O2 sensor will need to be relocated to behind the turbo in the downpipe.

Wiring should be straight forward since your harness already is wired for AVCS if I remember right.

Tons of info in the EJ207 owners thread in the 2.0L engine subforum.
Seahawk is offline   Reply With Quote
Old 08-28-2017, 03:45 PM   #3
Chad04STI
Scooby Newbie
 
Member#: 473280
Join Date: Aug 2017
Location: Union, Ky
Vehicle:
2004 Impreza STI
Silver

Default

Quote:
Originally Posted by Seahawk View Post
Version 8 is drive by cable, not DBW. No need to swap cam sensors or any sensors. Downpipe will need to be lengthened to meet your midpipe. Upstream O2 sensor will need to be relocated to behind the turbo in the downpipe.

Wiring should be straight forward since your harness already is wired for AVCS if I remember right.

Tons of info in the EJ207 owners thread in the 2.0L engine subforum.
Thank you!
Chad04STI is offline   Reply With Quote
Old 09-06-2017, 01:56 AM   #4
shopwizard
Scooby Newbie
 
Member#: 386578
Join Date: Apr 2014
Default

Chad04STI How did the swap go? Were there any other goodies that the shop required for the install?

I just lost a piston skirt in my '04 WRX and really want to do this same swap.

thanks
shopwizard is offline   Reply With Quote
Old 09-06-2017, 12:47 PM   #5
Chad04STI
Scooby Newbie
 
Member#: 473280
Join Date: Aug 2017
Location: Union, Ky
Vehicle:
2004 Impreza STI
Silver

Default

I'd say our swaps are completely different and to really do your research on your ecu, wiring harness, throttle body, and the version of ej207 that would fit best into your car and that it should be a lot easier than my experience because the 04 sti USDM isn't very similar to the 04 wrx in those areas!
Chad04STI is offline   Reply With Quote
Old 09-07-2017, 02:33 PM   #6
Seahawk
Scooby Specialist
 
Member#: 71665
Join Date: Oct 2004
Chapter/Region: South East
Location: Wilmington, NC
Vehicle:
1994 Impreza
White

Default

Quote:
Originally Posted by shopwizard View Post
Chad04STI How did the swap go? Were there any other goodies that the shop required for the install?

I just lost a piston skirt in my '04 WRX and really want to do this same swap.

thanks
Swap would be about the same but you would either need to run 2 sets of 4 shielded wires for AVCS or run 1 set and repin the TGV wires for the AVCS.
Seahawk is offline   Reply With Quote
Old 09-07-2017, 06:06 PM   #7
H_wells3000
Scooby Specialist
 
Member#: 322035
Join Date: Jun 2012
Chapter/Region: BAIC
Vehicle:
2003
Ol yeller

Default

USDM VS JDM CAMS HAVE DIFFERENT AVCS pickups and signals (up to version 9)

If you want to run your usdm ECU. You will have to put in your usdm cams and cam sensors. Putting your usdm sensors in jdm heads will require a little massaging to be spaced from the cam appropriately.

If you want to run all the jdm stuff the way its assembled. you must also run the v8 JDM ecu and sort the wiring out.

you need to research running a 32bit ecu with a jdm motor. most of those ej207 threads are swapping 2.0 wrx's and its a different can of worms vs your 04 sti.

Last edited by H_wells3000; 09-07-2017 at 06:17 PM.
H_wells3000 is offline   Reply With Quote
Old 09-11-2017, 03:17 PM   #8
Chad04STI
Scooby Newbie
 
Member#: 473280
Join Date: Aug 2017
Location: Union, Ky
Vehicle:
2004 Impreza STI
Silver

Default

How we made the swap work: First we made an adapter plate for throttle body and drilled the cam sensors, as well as custom down-pipe to meet my mid pipe and pulled some wiring from the 257. If you have any questions on what additional parts or the process for the swap just ask and I'll post a thread but long story short I threw an additional $1,600 in supporting parts.
Chad04STI is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 05:28 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.