Tuning the stock turbo legacy ECU

coolhand · Post by **coolhand** » Thu Jun 08, 2006 4:18 pm

Guys, the ones with the secondary board covering the Mother is from Gen 1, Series 1 an 8bit ECU.

The one Nico has, without the daughter board is from Series 2, 16bit ECU.

Nico, I'm actually thinking of the trick you did, but what's the tuning range like? up to 20Psi on MAF, then the MAP values, any difference?

ECU will use MAF as reference points when car is switched to MAP.
So, what will happen when the there is difference? Will MAP be able to open up as well?

vrg3 · Post by **vrg3** » Thu Jun 08, 2006 4:28 pm

Our ECUs are not the same as yours, coolhand. All North American Legacy Turbos use 8-bit ECUs, and none of them are the same as your 8-bit ECUs.

coolhand · Post by **coolhand** » Thu Jun 08, 2006 4:34 pm

You guys should get the 16bit ones...they're more responsive.

And to top it, Euro and JDM tunes are different. Perhaps its due to the fuel grade and Emission.

FuJi K · Post by **FuJi K** » Thu Jun 08, 2006 9:12 pm

Project_Legacy wrote:IIRC, auto and manual ECU's were the same...

So then there's no wire I have to ground....

Post by **Legacy777** » Fri Jun 09, 2006 2:24 am

You are correct.

vica153 · Post by **vica153** » Fri Sep 08, 2006 8:14 pm

So what was the conclusion?
Is it possible or not to get the average stock ecu (with blue plastic cover thing) tuned at neetronics?

Gas and food would add a good $200 onto my tab if I drove ll the way there. That added to the $1250CAD Nico said he paid, all for a single tune, is making a standalone look very nice.

IronMonkeyL255 · Post by **IronMonkeyL255** » Tue Sep 26, 2006 5:16 pm

I am beginning to think that I should just drop the coin on the WRX AEM setup, and swap to WRX ECU connectors.

Looking around, it doesn't look like there's a really good option for us. Like Vica153, driving up to neetronics just isn't a viable option for me when I can get something that can do more (launch control, meth/nitrous injection, etc) and get it tuned locally (less than 2 hour drive to one of the best scoob tuners in the SE).

Supposedly, a company called GEMS had an awesome plug-n-play option for us, but when I contacted them, they said they didn't have anything for our application.

Post by **Legacy777** » Wed Sep 27, 2006 2:08 am

Can you explain a little more what the WRX AEM setup is, and what you're wanting to do.

IronMonkeyL255 · Post by **IronMonkeyL255** » Wed Sep 27, 2006 4:16 pm

It's AEM's plug-n-play stand-alone engine management system for the WRX.

It's fully programmable, so any difference in sensors could be taken care of through software.

I was planning on getting a set of WRX harness side connectors and swapping the pins from my Legacy into the correct spots on the WRX setup. That way I should, theoretically, be able to plug right in to the AEM.

I haven't checked to see if this would all work, but talking with someone that knows a ton about these systems has led me to believe that this would work.

Future plans also involve a twin scoll turbo, Phase I DOHC STI heads, and meth injection. Most of this won't be done until I win the lottery, though...

Post by **Legacy777** » Wed Sep 27, 2006 9:44 pm

Well.....let me know what you find out regarding the AEM setup when you do some more homework.

bmxpunk · Post by **bmxpunk** » Thu Oct 19, 2006 7:18 am

What about doing the "universal" Aem setup that comes with the harness? or just swapping in a wrx harness. I have considered both options.

Innovative Tuning · Post by **Innovative Tuning** » Fri Oct 20, 2006 5:28 pm

I considered both those options myself and now I have an AEM universal box and harness here, plus a WRX AEM box and harness.

I'll think about it some more when I'm at that point in the build.

ericem · Post by **ericem** » Thu Nov 23, 2006 12:30 am

WAIT this guy is in canada? hes like 50km from me!!! wow, !!!! Eh !!

Post by **Legacy777** » Thu Nov 23, 2006 5:09 am

Yeah go check it out!

TurboGuy · Post by **TurboGuy** » Sun Dec 03, 2006 7:55 pm

Very interesting posts especially regarding the eprom chip in the stock SS ECU.
There was a time when I had eprom chips for analyzing Satellite TV card info for "EDUCATIONAL Purposes only"....and there is a wealth of knowledge from the past in flashing EPROMs. As I recall, one of the eprom legs got cut to allow for data transfer and a wire and switch was installed between this leg to allow for open and closed transfer ability.
Maybe this should be explored in a new thread.
Hey Nick! Your posts are excellent as usual NWSG

yazmo · Post by **yazmo** » Sun Jun 01, 2008 5:19 pm

hi guyd very interesting tread is this possible with the 94 turbo ecu
cuz i am living clse enough to go at nettronic if anyone can give me the info to contact them.

its may fix my excessive high gas consumtion

thx

Arctic Assassian · Post by **Arctic Assassian** » Sun Jun 01, 2008 8:03 pm

if you're close, go talk to them.

yazmo · Post by **yazmo** » Mon Jun 02, 2008 4:15 am

i realy want but i need the info to contact them and i have to figute out if my ecu can be tune it's a legacy 94 turbo.

anyone know why my gas needle keep going up and down all the time?

Arctic Assassian · Post by **Arctic Assassian** » Mon Jun 02, 2008 4:58 am

a quick search of google yeilds...
http://www.neetronics.com/neet/index.ph ... b14c700872

TA DAAAA!

b3lha · Post by **b3lha** » Tue Jun 03, 2008 10:34 am

Legacy777 wrote:Damn ip changed on the cable modem.

Here's the ECU pics

1990 Legacy n/a MT Hitachi ECU

1992 Legacy n/a MT JECS ECU

1991 Turbo Legacy Hitachi ECU

The 1992 ECU pictured is the same hardware as the SVX ECU, but different firmware. Information about how to modify it can be found here (scroll down to post 704): http://www.subaru-svx.net/forum/showthr ... 85&page=47

I am currently working on reverse engineering it. If anybody else has an interest in working with this ECU, please drop me an email.

yazmo · Post by **yazmo** » Wed Jun 04, 2008 5:55 am

thx for the info artic ill give them a call for sure
btw anyone know if this work with ecu 1994

colt45 · Post by **colt45** » Fri Mar 30, 2012 7:48 am

bump for ecu tuning options... i need some.

Post by **Legacy777** » Fri Mar 30, 2012 6:57 pm

There's not really anything out there.

This is your best bet right now.
http://bbs.legacycentral.org/viewtopic.php?f=19&t=43744

LucyFord · Post by **LucyFord** » Fri Mar 30, 2012 10:01 pm

Richard wrote:Don't blame Nico too much for his lack of mastering the Engilsh language. He's from Canada, eh. We all know how great their education system is. He probably speaks french or pygme or whatever else they speak up there too. We'll all be speaking Spanish here in the states soon enough, so enjoy it while you can.

My girlfriend used to write me love letters and I swear to god I needed a team of NSA cryptologists and the Hammurabi code to understand what the hell she wrote sometimes. Really. The shit was totally rediculous with all the shorthand, pictures, partial words, diagrams, and utter gobbledygook I wanted to slap her twice with a dictionary.

I mean, really, we get what Nico is saying most of the time. It just takes a little more effort to understand. 80% communication, 20% thought.

I am glad this thread got brought back from the dead. I lol'ed about 20 times reading it.

yazmo · Post by **yazmo** » Sat Mar 31, 2012 11:24 pm

im also having hard time with my English, but usually ppl get use to it.
im rebuilding my legacy and im about to need some help around here, im so happy this forum exist

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Tuning the stock turbo legacy ECU

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