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WRX with G1 and STI inj/turbo with full exhaust


Ivan Faeton
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Hello. Sorry for my english, I'm from Ukraine - its not my native language. So the story is. I've recently bought an Impreza WRX'04 with Link G1 ECU. I've successfully connected to it with notebook via COM port and had PCLink working. But the previous owner had this ECU tuned errorously, and it shows pretty much knocks in turbo zone. Maybe someone would gratefully share a saved version of ECU's maps suitable for WRX with STI injectors, VF34 STI turbo, EJ205 engine and full Blitz R-spec exhaust? So I could at least compare it with mine and start working on it with much more normal configuration. Please, help.

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Hello Ivan.

My complements on your english, I would not have known after reading this post.

More on the subject, there is not a map that we have here that is fully tuned, only start up.  If you are not getting anywhere with finding a map for it, the things you will need to be focusing on are inlet air temperatures maybe getting too high, timing too advanced in those zones, or the AFR is far too lean, as all of these things can have a great effect on knock.

Jurgen

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My purpose is at least find a starter fuel/ignition maps to make use of. Some of values that are on mine ECU are astonishing - timings from 0 to 35 in some really strange positions and so on. I would really apprecieate maybe some standart map and an advice on acceptable timings for WRX. I've seen some settings from base ECU (with EcuFLASH) and they are soo different of those I have in my Link. I don't know where to start and what basic values to use. Link and WRX stock ECU seem to work and use the same values while injecting fuel and sparkling it... I'm a bit desprate because of disability to make my car perfect and afraid of driving it... :( BTW, Checked out my AFR ratios with the wideband o2 sensor - they are really different and unstable. For example on 800 rpm while standing (don't know how this car state is named in english) I can see values from 12.6 to 15.1 (while fan on). 1000-3000 rpm shows 14.5-14.8 which are fine, as far as I know, but I've got a large lag before turbozone while crossing 2800-3200 rpm on full throttle. Car starts sneezing for about a second or 2 and only then rushes forward showng ~12.5 AFR... Checked my fuel transport (lack of english knowledge, blah) system from fuel pump to engine - it shows normal pressure, ~3bar standing and goes up to 4.7 bar with 1.2 bar boost. I'll save my ECU data and post in the next reply to this thread. And thanks for your answer. You are filling me with hope! :)

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And just remembered. When I first connected a wideband sensor I had 10.2 AFR while idle (that's the word?)). I fixed fuel maps a bit so it would become at least 12.5 idle and 14.5-14.8 in 1k-3k rpm, cause I had crazy fuel consumption before that. Like 10 mpg (23-24 litres / 100km). Now situation isn't really much better - 12 mpg (19-20 l/100km). I'm somehow feeling this aint good especially paying attention to the fuel I'm using - 98-100 Octane rally fuel :)

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Hello Ivan.

You are correct, this is the word you need.  Idle is the low RPM resting state with the engine running.  Usually waiting in a big line of traffic, and late for a job interview :)

I think really the best thing to do is to perform a reload of the factory default settings.  This is going to get you closest to a start up map.  This is done by going to 'Link Controls' and pressing 'Reload' (or just press CTRL+R).  If you are worried about loosing the current map, just save it first.

These settings should be very close to get you started, but being an STi you will have to adjust your master fuel number so at idle you're looking at a reasonable AFR using your wideband.  Do not take it for a big hard drive with these settings unless you are confident it is not going to run lean.

Let me know how you get on.

Jurgen

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Hi Ivan.

We sell the LC-1 kit, and you can download software to log with it, but is this going to solve your initial problem?  We already know you have unstable AFR.  I would like to see you try the last suggestion and see how you go with that first.  This way at least you know you are starting from a good base and not an old program.

Jurgen

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  • 2 weeks later...

Hello. Tried reloading my ECU. I'm guessing there's a way you can spoil even maps stored there? It gave me not a much better result... What kind of information is stored in factory default version? I'll get the one it gave me after resetting from my laptop and upload it tomorrow, but it's not a nice map to start ECU tuning with. Concering the LC1, I've already ordered it from Innovative. Sry. :( I just want to know is there any way to make it log all the information from LINK ECU to Logworks? Such as rev, throttle, knock, injecters state, etc. Or vice-versa is it possible to attach information taken from LC1 to LINK softwares' integrated logging feature?

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  • 2 weeks later...

The reload will install our default numbers and are a very good starting point for a relatively standard car. Be it an STi or regular WRX. Once you have done a reload be sure to perform a store and reset the TPS span.

From here a change in master is all that should be required to make the car idle nicely.

Unfortunately no way to bring the wideband output in to the link logging. G4 ecu's can however do this.

 

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  • 3 months later...
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Hi Guys, I have attached my map of this: 1995 STi Version 2 Wagon 2.5L forged pistons and rods, race bearing, nitrate crank and 703 block. Flowed head and 850cc DW Side Injectors. Water Meth injection FMIC GT3076r Greddy EBC 2 LINKECU G1 plugin Now I am missing some field which you guys have in your maps? Does my ecu have the right firmware? What ecu do you all have. Please check out my map and advise? Many thanks for you help, SanMan

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Hi Sanford.

Apart from the fact you have not yet set DC's on the boost table, it seems as though you have covered it all, so you should be ready for tuning!  Obviously I cannot see your car so I cannot say "perfect, it's all good"... I never would unless physically doing it myself.  As it is a G1, the firmware you have is the firmware you have... So no changing that just on the fly like these days.  Which brings me to the next answer, we all use G4 systems here.  The newer technology is far prefered for the ease and increased acuracy.

Jurgen

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Thanks Jurgen, I thought this was a G1 forum? Ok hence the PCL files are different. I have attached a fine tuned map after the fuel pump was changed. I am using an octane booster and water/meth injection. I am safely boosting 1.5bar no detonation. Notice the difference between my 2 maps... less fuel and more timing, the car is running smooth. Hope this helps someone :) San-

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  • 2 months later...

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