TechnoSquare 2008 Sedan ECU RE-Flash
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TechnoSquare 2008 Sedan ECU RE-Flash
Here are the results of the ECU flash on my 08 Sedan at TechnoSquare with pictures and charts.
First a few comments. My car was down for two weeks while my ECU was sent to Japan to pull the code. Not sure how this is done, but when it is returned Tadashi has all of the tables that control all engine management functions, transmission shift points, and all sensor limits.
The re-flash does a number of things. The top end governor is removed; the air fuel mixture is adjusted, timing is adjusted. The throttle response and position is adjusted. (This is a throttle by wire car and the throttle is controlled electronically.) Shift points are adjusted to max redline. Tadashi ran 11 pulls on the car over a period of approximately 3 hours. The first few pulls were to establish the baseline and A/F mixture. Once that was done he pulled up the code from my ECU, copied it to another file, and from that file made the changes to the ECU. He over wrote the ECU 11 times until he got the tune to the level where the car responded best. It is interesting to note that at the high end of the RPM in the stock configuration, the system dumps a lot of fuel into the cylinders at around 7600 hundred RPM, you can see a significant drop in power at this point with this rich mixture. The re-flash evened out the A/F mixture at 12.5 through the entire RPM range, up to 8500 RPM no fuel dump or richening at the high end of the RPM range. The max A/F with the tune is 13.9 versus 14.9 in the stock mode. The car pulls hard on the dyno and it is almost scary to see your tach go to 8500 RPM!
For those of you worried about a dealer knowing you flashed the ECU, I asked Tadashi about this so I could respond on the forum. The dealer will never know as the dealer cannot read the ECU, all the dealer sees is the output of the sensors, and they will all appear normal with the new mapping as it does not register any faults. In addition Tadashi assured me the ECU cannot go back to the stock map from learning. All of the parameters of the ECU are changed, so the learning that takes place is as it applies to the new settings, not the old stock settings. As far as the ECU is concerned the new program is its stock settings. No issues with smog as the OBD II connector will read as expected.
Final Tune showed WHP of 283.6, and Max Torque of 232.7 over a very wide margin of the RPM range. Horsepower starts to climb at about 4700 RPM and is at 10 WHP more at 5200 RPM which is maintained through 7000 RPM. Torque comes up fast at around 3400 RPM, pulls strong through 5700 RPM and does not drop off until around 7000 RPM. You can definitely feel it; the car pulls much stronger and does not stop. It is much faster and the feel is very noticeable in throttle response and just overall power, it really pulls, the feel is unmistakable. I believe the torque is what makes the difference in this tune, HP gains are what I expected, but Torque is significant in numbers and feel. Max Torque in stock mode is 220, tuned is 232.7, I would round that up to 233. In sport mode it is even more pronounced, and yes you can take it up to 8000 RPM for your shifts! If you get this tune you will not be disappointed.
I’m sorry to say that those of us with Stillen Intakes are loosing power and torque. In the tuned mode it drops back to stock numbers, along with the torque. I’m back to stock air boxes.
http://i539.photobucket.com/albums/f...g?t=1219210526
http://i539.photobucket.com/albums/f...g?t=1219210585
First a few comments. My car was down for two weeks while my ECU was sent to Japan to pull the code. Not sure how this is done, but when it is returned Tadashi has all of the tables that control all engine management functions, transmission shift points, and all sensor limits.
The re-flash does a number of things. The top end governor is removed; the air fuel mixture is adjusted, timing is adjusted. The throttle response and position is adjusted. (This is a throttle by wire car and the throttle is controlled electronically.) Shift points are adjusted to max redline. Tadashi ran 11 pulls on the car over a period of approximately 3 hours. The first few pulls were to establish the baseline and A/F mixture. Once that was done he pulled up the code from my ECU, copied it to another file, and from that file made the changes to the ECU. He over wrote the ECU 11 times until he got the tune to the level where the car responded best. It is interesting to note that at the high end of the RPM in the stock configuration, the system dumps a lot of fuel into the cylinders at around 7600 hundred RPM, you can see a significant drop in power at this point with this rich mixture. The re-flash evened out the A/F mixture at 12.5 through the entire RPM range, up to 8500 RPM no fuel dump or richening at the high end of the RPM range. The max A/F with the tune is 13.9 versus 14.9 in the stock mode. The car pulls hard on the dyno and it is almost scary to see your tach go to 8500 RPM!
For those of you worried about a dealer knowing you flashed the ECU, I asked Tadashi about this so I could respond on the forum. The dealer will never know as the dealer cannot read the ECU, all the dealer sees is the output of the sensors, and they will all appear normal with the new mapping as it does not register any faults. In addition Tadashi assured me the ECU cannot go back to the stock map from learning. All of the parameters of the ECU are changed, so the learning that takes place is as it applies to the new settings, not the old stock settings. As far as the ECU is concerned the new program is its stock settings. No issues with smog as the OBD II connector will read as expected.
Final Tune showed WHP of 283.6, and Max Torque of 232.7 over a very wide margin of the RPM range. Horsepower starts to climb at about 4700 RPM and is at 10 WHP more at 5200 RPM which is maintained through 7000 RPM. Torque comes up fast at around 3400 RPM, pulls strong through 5700 RPM and does not drop off until around 7000 RPM. You can definitely feel it; the car pulls much stronger and does not stop. It is much faster and the feel is very noticeable in throttle response and just overall power, it really pulls, the feel is unmistakable. I believe the torque is what makes the difference in this tune, HP gains are what I expected, but Torque is significant in numbers and feel. Max Torque in stock mode is 220, tuned is 232.7, I would round that up to 233. In sport mode it is even more pronounced, and yes you can take it up to 8000 RPM for your shifts! If you get this tune you will not be disappointed.
I’m sorry to say that those of us with Stillen Intakes are loosing power and torque. In the tuned mode it drops back to stock numbers, along with the torque. I’m back to stock air boxes.
http://i539.photobucket.com/albums/f...g?t=1219210526
http://i539.photobucket.com/albums/f...g?t=1219210585
WOW! Nice Numbers!! Man I wish I lived in Cali! Would love to go to his shop and get a tune!! But man, I wonder if the Injen CAI I have put on, or JWT Pop Chrgers lose HP also?? Think I will call Techno and see if they have my ECU already Decoded and ready for a flash? How much does the Flash itslef cost, without Dyno? Since Obviously I cant get a dyno from him, unless his whole shop floats on Water to my Place! LOL. Thank's again for showing and informing us of your Results! 
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TechnoSquare has the code for your car. You may need the part number from your ECU, check with TechnoSquare. I don't know what the flash is wihtout the Dyno, you'll have to call them. No aftermarket intakes they have tested produce any power. I specifically asked about the Injen CAI. Sorry to say the reply from Tadashi is that they are the worst. He showed me numbers from some tests he did last week, worse than the Stillen.
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I'd be so willing to do this, although I just don't think it would be very possible to do so since I live in Dubai. 
I may look into shipping out the ECU in the near future and having it done though.
I may look into shipping out the ECU in the near future and having it done though.
Originally Posted by Borna
I'd be so willing to do this, although I just don't think it would be very possible to do so since I live in Dubai.
I may look into shipping out the ECU in the near future and having it done though.
I may look into shipping out the ECU in the near future and having it done though.
im wondering how much a seperate ecu would be if someone was to want to keep their original stock.
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"The max A/F with the tune is 13.9 versus 14.9 in the stock mode. "
Explain this for me please. At what point is this?
The lower the number, the more "rich" the car is running. Stock, at part throttle, you should be around 14.7 to 1. At full throttle, 12.5:1 is a safe tune. You can go slightly leaner than that at full throttle and gain power, but you'll risk detonation.
If you change stoich (14.7:1) at part throttle, you'll kill your fuel economy.
Also, did they do any part throttle tuning? Adding timing there is where you can get the best SOTP results from a tune.
Explain this for me please. At what point is this?
The lower the number, the more "rich" the car is running. Stock, at part throttle, you should be around 14.7 to 1. At full throttle, 12.5:1 is a safe tune. You can go slightly leaner than that at full throttle and gain power, but you'll risk detonation.
If you change stoich (14.7:1) at part throttle, you'll kill your fuel economy.
Also, did they do any part throttle tuning? Adding timing there is where you can get the best SOTP results from a tune.
If the 283 WHp was on a 5AT ... that is a MAJOR increase from the TS reflash.
Let me put this into perspective, my car with the same FI exhaust and stock intakes did 252 WHp and 259 WHp, each on two different dynos.
That easily makes the TS reflash the biggest bang for the buck when it comes to bolt-ons.
Let me put this into perspective, my car with the same FI exhaust and stock intakes did 252 WHp and 259 WHp, each on two different dynos.
That easily makes the TS reflash the biggest bang for the buck when it comes to bolt-ons.
Originally Posted by terrycs
If the 283 WHp was on a 5AT ... that is a MAJOR increase from the TS reflash.
Let me put this into perspective, my car with the same FI exhaust and stock intakes did 252 WHp and 259 WHp, each on two different dynos.
That easily makes the TS reflash the biggest bang for the buck when it comes to bolt-ons.
Let me put this into perspective, my car with the same FI exhaust and stock intakes did 252 WHp and 259 WHp, each on two different dynos.
That easily makes the TS reflash the biggest bang for the buck when it comes to bolt-ons.
