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Old 06-07-2012, 11:00 PM   #1
azeyatic
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Member#: 261620
Join Date: Oct 2010
Chapter/Region: Tri-State
Location: NYC
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2004 WRX
WRB-

Default ej207 v8 run AVCS on 4eat?

Ive read everything i can in trying to find an answer to this question
Which is leading me to believe this isn't possible..

I have spoken to a few tuners and vendors and have gotten mixed
reviews..

The closest i got was reading someone running avcs with a sports shift 4eat.
i have a 04 wrx..with 4eat want to put in ej207 and run avcs ..not quite ready for the 6 speed (funding). Is this possible???

Thanks in advance!

...please someone make my day..lol
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Old 06-08-2012, 01:14 AM   #2
lukeskywrx
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2004 Spec-C Type RA
What MAF? -Speed Density!

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There is no JDM STI with an Auto, so I am not sure if the STI ECu has the necessary features, but it might. I am sure however there is an auto JDM WRX that would have AVCS as well and that ecu would work on the 207.
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Old 06-08-2012, 01:20 AM   #3
azeyatic
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Unreal! Never thought of that..thanks!
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Old 06-12-2012, 03:16 AM   #4
Disruptz
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I run the 01 JDM WRX ecu, Since the jdm wrx sti & non sti, both have avcs.
and use the sportshift

- You can easily source a 01 jdm wrx ecu for $100-300 usd, but from japan or nz(huge jdm market) etc, just pay intl freight.

- Try ebay, or post a wanted thread on the forums. I'm not sure of any online stores,

- Aftermarket ecu

- Or just dont run avcs if it's too much trouble,



*or if you'r willing to pay a bit extra, I could source a JDM V7/8 4EAT WRX ecu for $200+shipping(estimated)*

Last edited by Disruptz; 06-12-2012 at 03:35 AM.
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Old 06-12-2012, 03:57 AM   #5
azeyatic
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What kind of numbers you putting down? And trying to obtain in the future?

That price doesnt sound to bad how much is shipping?
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Old 06-12-2012, 05:51 AM   #6
Disruptz
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Quote:
Originally Posted by azeyatic View Post
What kind of numbers you putting down? And trying to obtain in the future?

That price doesnt sound to bad how much is shipping?
198kw or 266hp as of last dyno run. Iv'e rebuit the motor since then, oversized pistons, etc,

car patiently sits in the garage atm, waiting to be finished
still runs the vf30 and 550cc pinks,

estimated $50 for shipping from my local subaru club.
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Old 01-25-2013, 11:33 AM   #7
Deedz
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Location: SK, CANADA
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JDM STi Swapped

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From what I can find it looks like you must have went 6-Speed now, no?

I'm in the same boat. I've had mine running and on the street. Only drives smooth in 1st and 2nd, 3rd and Drive don't shift properly. But man does it rip, not even fully tuned and I went right sideways breaking all four loose on dry pavement when the boost hit in 1st.

As others others have stated the STI ECU doesn't have both MT/AT ROMs like the WRX ECU's do. So even though mine will drive the ECU doesn't know when the TCU is telling it to shift, which is why it won't shift smooth. So yes the best option is a JDM WRX ECU, which I am currently trying to find if anybody reading this knows a source.

I finally got a hold of P&L Motorsports out of Illinois, the owner runs an Auto STI set-up now swapped over to a Fozzy chassis. He confirmed that there are only a couple other real options...

1-Stock USDM WRX ECU with no AVCS capability, requiring the cams to be plugged, but full 4EAT Control. This isn't a huge loss if you're going with a full higher HP build but also if thats your future plans then you would want a built 4EAT too (IPT Performance), I think the stock 4EAT's are good to mid/high 300's for AWHP.

2-JDM STI ECU with AVCS (of course) and add a manual control switch block for the 4EAT, which apparently IPT offers. Works fine but also a bit of a pain for driving around town though.

Anyways would like to chat with you sometime about the direction you went and so on. How everything went, and the numbers you ended up with. Hit me back!
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Old 02-02-2013, 11:54 PM   #8
azeyatic
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Quote:
Originally Posted by Deedz View Post
From what I can find it looks like you must have went 6-Speed now, no?

I'm in the same boat. I've had mine running and on the street. Only drives smooth in 1st and 2nd, 3rd and Drive don't shift properly. But man does it rip, not even fully tuned and I went right sideways breaking all four loose on dry pavement when the boost hit in 1st.

As others others have stated the STI ECU doesn't have both MT/AT ROMs like the WRX ECU's do. So even though mine will drive the ECU doesn't know when the TCU is telling it to shift, which is why it won't shift smooth. So yes the best option is a JDM WRX ECU, which I am currently trying to find if anybody reading this knows a source.

I finally got a hold of P&L Motorsports out of Illinois, the owner runs an Auto STI set-up now swapped over to a Fozzy chassis. He confirmed that there are only a couple other real options...

1-Stock USDM WRX ECU with no AVCS capability, requiring the cams to be plugged, but full 4EAT Control. This isn't a huge loss if you're going with a full higher HP build but also if thats your future plans then you would want a built 4EAT too (IPT Performance), I think the stock 4EAT's are good to mid/high 300's for AWHP.

2-JDM STI ECU with AVCS (of course) and add a manual control switch block for the 4EAT, which apparently IPT offers. Works fine but also a bit of a pain for driving around town though.

Anyways would like to chat with you sometime about the direction you went and so on. How everything went, and the numbers you ended up with. Hit me back!
Just decided to check this thread back..glad to see you did some leg work!!

Simply put as it was told to me... "its a crime to run these engines on automatic"

I couldnt find the ecu that would have been able to run auto avcs.. and i really wanted the quickness down low.. granted i have driven without it for a week and it didnt feel the same.

I did the 6 speed and i am happy as hell with it... dont really see me driving auto again! Traffic... open road..dont care so much more control so much more in tune with your car!

i just recently had the tune done last week ..feels amazing runs smooth in high rpm. Going monday to get a few guages installed and putting her on the dyno!
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Old 01-09-2014, 03:55 PM   #9
Deedz
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2004 WRX Sport Wagon
JDM STi Swapped

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Quote:
Originally Posted by azeyatic View Post
Just decided to check this thread back..glad to see you did some leg work!!



Simply put as it was told to me... "its a crime to run these engines on automatic"



I couldnt find the ecu that would have been able to run auto avcs.. and i really wanted the quickness down low.. granted i have driven without it for a week and it didnt feel the same.



I did the 6 speed and i am happy as hell with it... dont really see me driving auto again! Traffic... open road..dont care so much more control so much more in tune with your car!



i just recently had the tune done last week ..feels amazing runs smooth in high rpm. Going monday to get a few guages installed and putting her on the dyno!
Glad to hear, I now made the same choice. Finally in the process of swapping in the full STi 6-Speed drivetrain.

Did you find or do you have any information on the wiring changes with the 4EAT harness/6-Speed merge? Or did you swap out the whole harness.

Any help would be greatly appreciated. I can't find any solid answers so far, just bits and pieces. When I complete mine I plan to write up an actual procedure I'm surprised that I haven't found one t this point.
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Old 12-07-2015, 02:43 PM   #10
Titter
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Chapter/Region: International
Location: Ontario, Canada
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2002 WRX Wagon
EJ207 Spec C 4EAT

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hate to bring up a dead thread but what ever happen to the final verdict?

i am in the process of swapping a 207 into a 4eat 2002 wrx wagon and i am worried about the same issues.

however i was shown this:


from a 03 jdm sti. it shows an MT/AT & AVCS in the same table. even has target boost parameters for AT's? the issue is its showing 5 gears. i dont know too much about what im looking at (still learning) but it seems they are recognized by the ecu.

so does it all work? im trying to avoid swapping to manual from auto as that is a whole different ball game and also alot more $$$.

cheers,
titter

Last edited by Titter; 12-07-2015 at 03:37 PM.
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Old 12-09-2015, 02:27 PM   #11
4eat05
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So, really the only way to run avcs and 4eat is with the Jdm automatic Wrx ecu?

Is it not possible to use a usdm 06-7 automatic Wrx ecu in 02-05 Wrx?
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Old 07-02-2021, 10:31 PM   #12
Alkaline198
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black

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Is there something with jdm auto being sport shift? I heard even jdm 205 auto ecu won't quite fo the trick. Please educate us!
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Old 07-03-2021, 06:21 AM   #13
snow_bound26
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There have been a few threads on here about trying to get AVCS to work with an auto and none that I have read have been able to figure it out. My guess is there are wiring differences and probably a different TCU used in the JDM auto models.
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Old 12-25-2023, 04:39 AM   #14
abraxas_
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It can be done, however you need a JDM ECU, TCU and wiring harness from an AVCS vehicle, be it a JDM forester or wrx. As an example I’ve swapped a V8 EJ207 spec-c into an st/b STI SF5 with a 4EAT, but I had to pull the ECU, wiring harness, and TCU out of a 2002 JDM SG5. The swap worked well because the SF5 is drive by cable as is the EJ207, and the SG5 didn’t have sport shift so there were no weird wiring issues and thus far everything has installed without a problem.

That being said, I haven’t got to the point where I can turn the car on yet. Still need some crucial parts.


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