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Old 03-11-2004, 01:46 AM   #1
Supraru
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Default Rs ece reflash?

Ok, I was talking to one of my good friends with an Rs about reflashing our ecu's and how I wanted Cobb to come out with one for an Rs. Well...he said he was watching a program about the different ecu's, basically he said with obd1 you can get a chip and reflash the chip and it'll work but anything obd2 you reflash the ecu and a chip doesn't really do much or the ecu just learns around it.

Now with that said basically if you were to get a reflash done on your car you send out the ecu and they reprogram it. My freind has a 99' Gsx and he bought an ecu and also bought the software so he can change it with his laptop. Do you think that I could plug that into the obd2 port and mess with my ecu or is it more complicated then that. Basically isn't what he has like what say Cobb would have for the Wrx? Any info would help I really want a reflash but Cobb is moving way to slow.
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Old 03-11-2004, 12:02 PM   #2
jeffg
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Okay, I will bite.

If OBD2 reflashes didnt work, why are there so many WRX reflashes? Some people have said that the ECU will learn around piggy back add-ons like the SAFC, but no one has ever really proven it.

No, your friends Mitubishi ECU tool will not work on your car. If it would then all of the venders would be selling this service. Each car maker has an entirely custom ECU. The hardware may be similar, but its no where near similar enough to work like you want.

Unfortunately your are stuck waiting for someone to figure out the reflash, or go to a standalone, or try the piggy back option. Who knows, it may work just fine.

J
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Old 03-11-2004, 12:08 PM   #3
Supraru
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Quote:
Originally posted by jeffg
Okay, I will bite.

If OBD2 reflashes didnt work, why are there so many WRX reflashes? Some people have said that the ECU will learn around piggy back add-ons like the SAFC, but no one has ever really proven it.
J
They work on obd2 cars. I said if you put a chip on an obd2 then send that chip out to get flashed it won't work. You can do that on obd1's. Just buy a chip and flash the chip to what new mods you put on and so on.

This sucks..stupid Cobb.
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Old 03-11-2004, 01:39 PM   #4
jeffg
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I dont know what kind of "chip" you would add to the ECU. Do you mean like an SAFC or an Emanage? Or do you mean swapping an actual IC on the ECU board? I know this was common for Audi's, but only because the factory "chip" was locked and couldnt be reflashed. The replaced it with an unlocked chip and could load what ever map they wanted.

The Subaru problem is a little more complex than just a locked chip.

Closed Loop tuning on newer cars will always try and achieve a set AFR, regardless of what the map says. This is what Cobb is trying to change. The target AFR and how it goes about getting there. Pretty damn complicated, and us RS folk are few and far between compared to WRX's

J
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Old 03-11-2004, 01:43 PM   #5
Supraru
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damn. Yes I was talking about like the tourque chips and stuff.
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Old 03-12-2004, 08:29 AM   #6
Kevin Thomas
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Default Dang

Why not just get an ITC and an AFC (Ignition Timing Controller and Apexi Fuel Controller) or something similar? Yes, the ECU can learn around these controllers because the ECU is constantly changing it's air/fuel maps and ignition advance/retard. I know from doing different dyno runs and everything else being equal, the ECU is dumping more fuel during a WOT run and vice versa than a previous run. This was without a fuel controller though. Just with a stock ECU, the fueling changed. Others (Like Patrick Olsen here) notice a similar change like my ECU but he had a fuel controller. Also, using my Pocketlogger software, I can see the ignition maps change.
The controllers do help you adapt to the changing conditions so you can get maximum power output with the changing conditions (ex: winter, summer).

Also, why not give a Torque Chip or ProECM Powerchip a try? They are options available that people say they can feel while others do not. It may or may not work for you.

Last edited by Kevin Thomas; 03-12-2004 at 09:01 AM.
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Old 03-12-2004, 09:00 AM   #7
Kevin Thomas
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Default Oh..BTW

On another note as far as the ECU changing its maps even though you have a fuel controller setting....I've had a Hyper SFC fuel controller on my OBS for years (through winter and summer) and never had to change my settings with the weather. According to my Jumptronix air/fuel meter, everything was the same but you know how people say that isn't accurate enough. My EGT's stayed the same though so......

You just have to try a controller out yourself to see. Stock, I know my ECU changes but with a controller it appeared to not have. I can't say that I had accurate enough instruments (gauges) to measure the changes BUT I can say I didn't have any problems with the settings I had. Sorry if I am confusing you!
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Old 03-12-2004, 02:46 PM   #8
Supraru
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You weren't confusing me that much, I figured it out. All the information is great. I don't wanna do a tourqe chip because it'll just learn around that and I don't wanna have to constantly reset my ecu. I was gonna get something like an afc but my friend has one on his 00' and I honestly notice maybe a small difference, but he is gonna try changing the settings. I'd rather just have something that won't relearn itself and I'm sure we would notice some really good gains from a reflash. I heard there is a place in Canada that does Rs reflashes, has anyone had experience or have heard anything about them?
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Old 03-12-2004, 04:21 PM   #9
Kevin Thomas
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Quote:
Originally posted by Supraru
I don't wanna do a tourqe chip because it'll just learn around that and I don't wanna have to constantly reset my ecu.

This is a big IF part. I know I had a ProECM Powerchip on an older Subaru for 2 years and the gains where still there. The chip was transparent and didn't seem to do anything..........until I uninstalled it. *See ProECM Powerchip Results ..search title*. The older OBD1 ECU certainly didn't learn around it. Some people will say otherwise but at least you can see some evidence from what I posted that it does work or at least it's doing something.
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Old 03-13-2004, 02:07 PM   #10
Supraru
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Quote:
Originally posted by Kevin Thomas
This is a big IF part. I know I had a ProECM Powerchip on an older Subaru for 2 years and the gains where still there. The chip was transparent and didn't seem to do anything..........until I uninstalled it. *See ProECM Powerchip Results ..search title*. The older OBD1 ECU certainly didn't learn around it. Some people will say otherwise but at least you can see some evidence from what I posted that it does work or at least it's doing something.
Yeah, that's what my friend saw on the program, that you can chip an obd1 ecu and you'll be fine. When you chip an obd2 it'll learn around it.
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