S-Squared Reflash Special
01-08-2004, 06:49 PM
#16
Originally posted by verc
wow that's kinda wierd, makes you think how many hours ECUtek spent on the thing. Which one's the rear defroster window button btw?
wow that's kinda wierd, makes you think how many hours ECUtek spent on the thing. Which one's the rear defroster window button btw?
01-08-2004, 06:51 PM
#17
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Car Info: 2003 WRX, 2008 Camry
Originally posted by verc
wow that's kinda wierd, makes you think how many hours ECUtek spent on the thing. Which one's the rear defroster window button btw?
wow that's kinda wierd, makes you think how many hours ECUtek spent on the thing. Which one's the rear defroster window button btw?
it's the one in the HVAC next to the AC button. looks like a smoking toaster
01-08-2004, 06:51 PM
#18
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Strng1dah,
the re-tune if we dont do the work is 150, it will vary a little depending on the state of the re-tune, if its something real simple we can work a deal.
Verc,
the defrost is next to the A/C button on the dash next to the HVAC controls.
thx,
Nate
S-Squared
the re-tune if we dont do the work is 150, it will vary a little depending on the state of the re-tune, if its something real simple we can work a deal.
Verc,
the defrost is next to the A/C button on the dash next to the HVAC controls.
thx,
Nate
S-Squared
01-08-2004, 07:11 PM
#20
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Join Date: Dec 2002
Location: Sacramento CA
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Car Info: 02 Impreza WRX sedan
Toggling between maps requires the ignition switch to be 'on' while at 100% throttle then depressing the defrost button, but does not require the engine to be running. This makes it safe to switch maps with the car safely at rest in the driveway with no fears of overrevving or unsafe speeding.
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0==WW==0
"…axles of evil…" - george w. bush
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0==WW==0
"…axles of evil…" - george w. bush
01-08-2004, 07:31 PM
#21
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Originally posted by Wingless Wonder
Toggling between maps requires the ignition switch to be 'on' while at 100% throttle then depressing the defrost button, but does not require the engine to be running. This makes it safe to switch maps with the car safely at rest in the driveway with no fears of overrevving or unsafe speeding.
Toggling between maps requires the ignition switch to be 'on' while at 100% throttle then depressing the defrost button, but does not require the engine to be running. This makes it safe to switch maps with the car safely at rest in the driveway with no fears of overrevving or unsafe speeding.
on the wideband, we can do a wideband if you prefer, in order to do it there is a small fee for setup as we do need to get under the car to connect it.
Otherwise we use the readings of the stock front sensor since
the ecu is using these for its fuel mapping for Target A/F ratio. We always start at a very conservative map and work upwards when going this route. We have done this quite a bit and had very good results, while the wideband IS the best option here, you can get a very good tune using the stock sensor AS LONG as you tune conservatively , if you are looking for a very aggressive tune a wideband is absolutely necessary.
Thanks!
-Nate
S-Squared
Last edited by S-Squared; 01-08-2004 at 07:35 PM.
01-08-2004, 07:47 PM
#22
When the stock ECU is running off the front sensor isn't that only during light loads and used for closed loop lambda fueling, when your running at WOT isn't the ECU in open loop running of a predetermined fuel/timing map?
Not sure how accurate the data on a road tune would be without a wideband given the slow response of the front O2 (which is why it goes to open loop under WOT right?)
Sorry for the questions just trying to understand some of this tuning stuff...
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
Not sure how accurate the data on a road tune would be without a wideband given the slow response of the front O2 (which is why it goes to open loop under WOT right?)
Sorry for the questions just trying to understand some of this tuning stuff...
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
01-08-2004, 08:15 PM
#23
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Mike,
I guess I need to clarify what I was saying,
For very conservitive mild tunes where we are dealing with a rather rich fuel mixture as it is yes we use the stock 02 as most do not want to have us install an extra bung in the exhaust for the wideband sensor. Unfortunatley the wideband kits that sample the exhaust ( with a remote box and sensor ) and dont require a bung are nowhere near as accurate as the in exhaust type. I do prefer to tune with the wideband as it is more accurate.
For any sort of tune higher than mild ( bigger turbo , etc ) a wideband is a must for the reasons you have stated. On the tunes on a mostly stock car I do not like to lean the car much due to egt temps and possible damage to the cat's ( especially if the up-pipe is stock ) and therefore keep the fueling rather rich.
We have base maps that we have created for most of the tunes in the mild catagory that we have spent much time getting the mapping right, while they need to be slightly modified for every cars specific mods etc they handle most fueling req's out of the box and therefore usually dont have the req for the wideband.
feel free to ask questions, I am sure I will return the favor one day
-Nate
S-Squared
I guess I need to clarify what I was saying,
For very conservitive mild tunes where we are dealing with a rather rich fuel mixture as it is yes we use the stock 02 as most do not want to have us install an extra bung in the exhaust for the wideband sensor. Unfortunatley the wideband kits that sample the exhaust ( with a remote box and sensor ) and dont require a bung are nowhere near as accurate as the in exhaust type. I do prefer to tune with the wideband as it is more accurate.
For any sort of tune higher than mild ( bigger turbo , etc ) a wideband is a must for the reasons you have stated. On the tunes on a mostly stock car I do not like to lean the car much due to egt temps and possible damage to the cat's ( especially if the up-pipe is stock ) and therefore keep the fueling rather rich.
We have base maps that we have created for most of the tunes in the mild catagory that we have spent much time getting the mapping right, while they need to be slightly modified for every cars specific mods etc they handle most fueling req's out of the box and therefore usually dont have the req for the wideband.
feel free to ask questions, I am sure I will return the favor one day
-Nate
S-Squared
Last edited by S-Squared; 01-08-2004 at 08:19 PM.
01-08-2004, 11:04 PM
#25
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Join Date: Nov 2003
Location: Elk Grove
Posts: 112
Car Info: 2003 WRX
I'm new to all this ECU stuff...but how much power is gained through a mild tune...assuming you have no prior modifications. Are the hp and torque numbers similar to those found at COBB and Vishnu? And just out of curiosity, I've read on several sites that cylinder 3 usually runs a little lean in WRX's. When you increase the power of the car with the same fuel load...aren't you leaning the engine some more? Sorry for all the questions.
01-08-2004, 11:39 PM
#26
Originally posted by Wrx17
I'm new to all this ECU stuff...but how much power is gained through a mild tune...assuming you have no prior modifications. Are the hp and torque numbers similar to those found at COBB and Vishnu? And just out of curiosity, I've read on several sites that cylinder 3 usually runs a little lean in WRX's. When you increase the power of the car with the same fuel load...aren't you leaning the engine some more? Sorry for all the questions.
I'm new to all this ECU stuff...but how much power is gained through a mild tune...assuming you have no prior modifications. Are the hp and torque numbers similar to those found at COBB and Vishnu? And just out of curiosity, I've read on several sites that cylinder 3 usually runs a little lean in WRX's. When you increase the power of the car with the same fuel load...aren't you leaning the engine some more? Sorry for all the questions.
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
01-09-2004, 05:31 AM
#27
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Car Info: 1993/2000/2001 GF4 mostly red
Originally posted by MPJ Performance
When the stock ECU is running off the front sensor isn't that only during light loads and used for closed loop lambda fueling, when your running at WOT isn't the ECU in open loop running of a predetermined fuel/timing map?
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
When the stock ECU is running off the front sensor isn't that only during light loads and used for closed loop lambda fueling, when your running at WOT isn't the ECU in open loop running of a predetermined fuel/timing map?
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
01-09-2004, 08:40 AM
#28
Originally posted by BAN SUVS
The ECU may not be reading the O2 sensor in open loop, but the sensor is still there and still, well, sensing. Works fine if you have something besides the ECU reading the signal.
The ECU may not be reading the O2 sensor in open loop, but the sensor is still there and still, well, sensing. Works fine if you have something besides the ECU reading the signal.
What else would you hook to the stock front O2 sensor?
Mike
01-09-2004, 10:21 AM
#30
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Krinkov,
we will be letting everyone know as soon as we get support for the STI, a month or 2 out from what I understand.
WRX17,
Yes the power numbers are simaler from vishnu or the cobb flashes, thats about as much as you can safley get out of a stock car which is why they all get approx the same power #'s. As far as fueling goes, the fuel maps etc get adjusted accordingly to keep everything in a safe area.
JeffSW_02WRX,
I think the answer above takes care of your question as well.
thanks guys,
Nate
S-Squared
we will be letting everyone know as soon as we get support for the STI, a month or 2 out from what I understand.
WRX17,
Yes the power numbers are simaler from vishnu or the cobb flashes, thats about as much as you can safley get out of a stock car which is why they all get approx the same power #'s. As far as fueling goes, the fuel maps etc get adjusted accordingly to keep everything in a safe area.
JeffSW_02WRX,
I think the answer above takes care of your question as well.
thanks guys,
Nate
S-Squared