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v3narrowbandsim [2008/12/22 08:49]
twdorris
v3narrowbandsim [2024/03/15 11:16] (current)
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 With ECMLink'​s narrowband simulation function, you can simply run the 0-5v output to the ECU and then configure the ECU to produce the 0-1v simulation internally, thus freeing up an additional input on the ECU for some other aftermarket sensor. With ECMLink'​s narrowband simulation function, you can simply run the 0-5v output to the ECU and then configure the ECU to produce the 0-1v simulation internally, thus freeing up an additional input on the ECU for some other aftermarket sensor.
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 ^Wideband kit^Switch point (volts)^ ^Wideband kit^Switch point (volts)^
-|AEMWB ​ |  4.07|+|AEMWB ​30-2301 ​ ​| ​ 4.07|
 |AEMWBGauge ​ |  2.34| |AEMWBGauge ​ |  2.34|
 |AEMWBGaugeR1 ​ |  2.53| |AEMWBGaugeR1 ​ |  2.53|
 +|AEMInlineWB 30-2310 ​ |  3.12|
 +|AEMAnalogWB 30-5130 ​ |  3.12|
 |AFXWB ​ |  4.07| |AFXWB ​ |  4.07|
 |DynoJetWB ​ |  2.94| |DynoJetWB ​ |  2.94|
 |FJOWB ​ |  2.5| |FJOWB ​ |  2.5|
-|LC1WB ​ |  2.5|+|LC1WB ​ |  2.44|
 |PLXWB ​ |  2.35| |PLXWB ​ |  2.35|
 |TechEdgeLinWB ​ |  2.85| |TechEdgeLinWB ​ |  2.85|
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-===== WBO2 sensor location ===== 
-The best place to install the WBO2 sensor for accurate narrowband simulation is in the front O2 sensor location. ​ [[innovatelc1orlm1install|This page]] outlines how one user installed his WBO2 in the front O2 location. ​ When installed there, the WBO2 sensor can respond very quickly to the changes made by the ECU to A/F mixture. ​ This is inline with assumptions in the ECU on how quickly it can expect to see a "​response"​ as it adjusts short term fuel trim.  ​ 
  
-However, there are a number of situations where you may find it easier to install the WBO2 further downstream (in the rearO2 location on a 2G, for example). ​ The problem is that the sensor responds more slowly to ECU mixture changes the further away from the engine it's placed. ​ As a result, the ECU makes adjustments to the A/F mixture too quickly and "​overshoots",​ running really lean for a few seconds, then really rich, then lean, etc.  ​ 
  
-To correct for this, you need to reduce the rate at which the ECU will adjust fuel mixture during closed loop.  You do that in the STFTAndO2Feedback panel in Direct Access. ​ The following illustrates a stock 2G DSM configuration. 
  
-{{http://​www.ecmtuning.com/​images/​forums/​stftrate-stock2g.gif}} 
  
-And the next shows the same panel configured for running my own car with an LC-1 installed in the rear O2 (2G) sensor location. ​ The change you see to the HiAir load factor really isn't necessary. ​ That particular change was made for personal preference on my car. 
  
-{{http://​www.ecmtuning.com/​images/​forums/​stftrate-rearo2.gif}} 
  
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 +===== WBO2 sensor location =====
 +By FAR, the **best** place to install the WBO2 sensor for accurate narrowband simulation is in the front O2 sensor location. ​ [[innovatelc1orlm1install|This page]] outlines how one user installed his WBO2 in the front O2 location. ​ When installed there, the WBO2 sensor can respond very quickly to the changes made by the ECU to A/F mixture. ​ This is inline with assumptions in the ECU on how quickly it can expect to see a "​response"​ as it adjusts short term fuel trim.
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 +**NOTE ABOUT HEAT:** There'​s a rumor running around that WB sensors are not designed to take the heat that close to the engine. ​ I honestly don't know if there'​s some truth to that or not, but it seems strange to me and doesn'​t jive with our empirical results. ​ I've run the WB sensor in the front O2 location on my own car for years and have had no problems, even after putting it through a LOT of hard (and HOT) road course miles.
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 +However, there are a number of situations where you may find it easier to install the WBO2 further downstream (in the rearO2 location on a 2G, for example). ​ The problem is that the sensor responds more slowly to ECU mixture changes the further away from the engine it's placed. ​ As a result, the ECU makes adjustments to the A/F mixture too quickly and "​overshoots",​ running really lean for a few seconds, then really rich, then lean, etc.  ​
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 +To correct for this, you need to change how the ECU adjusts the short term fuel trim.  You do that in the STFTAndO2Feedback panel in Direct Access. ​ The following illustrates a stock 2G DSM configuration.
 +
 +{{https://​www.ecmtuning.com/​images/​forums/​stftrate-stock2g.gif}}
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 +You can try slowing the adjustment rates down (there are a lot of them) if you want.  But your best bang-for-buck change will be to the **O2FeedbackAdjRate** table. ​ Try values like 10 and 16 or 14 and 18 instead of the stock values (4 & 10 shown in the 2G example above).
  
v3narrowbandsim.1229953754.txt.gz ยท Last modified: 2008/12/22 08:49 by twdorris