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Author Topic: only manipulating LAMFA?  (Read 36187 times)
phila_dot
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« Reply #45 on: August 17, 2012, 10:56:10 AM »

btw

The ECU calculates the actual lambda by the "LALIUSH (2)" maps.
This map convert from the measured narrow band O2 sensor voltage to a lambda value.




I haven't dug too deep into Lambda regultation but I don't know if this gets used at all in NB ECUs.

Pre-cat control tries to maintain target voltage USR. IIRC LALIUS is not even present in NB ECUs.

LALIUSH is post-cat. I don't remember exactly if/how it gets used, but I don't believe it is utilized in Lamba regulation.
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nyet
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« Reply #46 on: August 17, 2012, 11:21:57 AM »

I am pretty sure in ME7 there is NO actual lambda calculation anywhere.
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20VTMK1
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« Reply #47 on: August 17, 2012, 11:48:33 AM »

Stock BTS only works with stock boost.

If you alter boost in any way, you need to clean up BTS or it does some very bad things to your gas mileage.

Thanks ,

I did a bit of diggin last nite , the 032BJ file has the threshold set at 300 deg c , where as the 180 PS files from the audi's for eg , are set at 900 deg C - all other fueling and component protection maps are the same .

LAMBTS is quite a funky map , when you say clean it up , you mean bring it closer to complement LAMFA ? In stock form it dips deep into the 10's at peak load . correct ?\

Thank you kindly
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nyet
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« Reply #48 on: August 17, 2012, 11:52:00 AM »

LAMBTS is quite a funky map , when you say clean it up , you mean bring it closer to complement LAMFA ? In stock form it dips deep into the 10's at peak load . correct ?\

Yup, but with a stock chip it will never see that much load unless you have some sort of malfunction causing overboost.

So figure out what your max load will be (since you will be running more boost), and in those areas, bring it up to 11.5 or 12.5 or whatever you think appropriate for your tune.
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
schattenparker
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« Reply #49 on: August 19, 2012, 12:42:17 AM »

another question:
wenn i change the load axis from LAMFA by 50 % to 100 %. What Value did the ECU calculating in idle (lower 50%)?
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20VTMK1
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« Reply #50 on: August 19, 2012, 09:53:00 AM »

Yup, but with a stock chip it will never see that much load unless you have some sort of malfunction causing overboost.

So figure out what your max load will be (since you will be running more boost), and in those areas, bring it up to 11.5 or 12.5 or whatever you think appropriate for your tune.

Great .. I did just that .
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20VTMK1
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« Reply #51 on: August 19, 2012, 09:55:41 AM »

another question:
wenn i change the load axis from LAMFA by 50 % to 100 %. What Value did the ECU calculating in idle (lower 50%)?

If I understand you correct , dont change anyhting below 50 % on the scale , I noticed that this plays a role with pt and idle AFR's . At 50 % I ran 13.7 and gradually dropped it down to high load high rpm . If you get the high load right , it will keep BTS in check - am I right guys ?
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phila_dot
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« Reply #52 on: August 19, 2012, 10:40:33 AM »

another question:
wenn i change the load axis from LAMFA by 50 % to 100 %. What Value did the ECU calculating in idle (lower 50%)?

Your lowest axis values will be used during all conditions below that value. Same goes with your highest.
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userpike
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« Reply #53 on: August 19, 2012, 04:49:41 PM »

Why would you need to do that? The z axis of tables is always the output of the table. Have you looked at the FR yet? If there are other conversions/scaling to be done, they are described in the FR.

Unless you are referring to the fact that the ACTUAL value stored in the ECU's memory (8 or 16 bit) isn't actually an infinitely precise floating point, and must be represented as a fixed point integer.... which is an entirely different discussion.
This terminology is NEVER used for a reason. Sensor voltage is converted to a lambda value. Depending on the sensor, the conversion is different. Same with MAFs.

Sensor voltage is sensor voltage.

After it is converted to different units (g/sec or lambda or AFR), it no longer has the "voltage" units.

Thus it is NEVER referred to as "lambda voltage" or "g/sec voltage", which would be confusing because there would be no way to know if the person is talking about the resulting (calculated) lambda value, or the actual voltage coming from the sensor.

It would be properly referred to as "O2 sensor voltage" or "MAF sensor voltage"

I meant to  say lambda sensor voltage, please excuse my typo. I see how this was confusing.

yes, I have read the me7.5 FR once. I know I need to read it again as you always miss stuff the first time around but my questions are in regard to interpreting the values on the maps using WinOls. Alot of the time while searching and examining maps I cant find what the z values actually stand for. (thats why I wanted to know if the z values of the map pic I uploaded(on pg3) were actual lambda values or the sensor voltage) That info isn't in the FR afaik.
 
Another thing is that a big difference between me7.1 and 7.5 is the implementation of the wideband 02 sensor. So what are the differences going to be in the maps that the both EMSs share? or do I NOT have to worry about that and just manipulate the maps as I see fit? Now that I know the z value is for sure actual lambda values I feel I can confidently change the map to what I want.

Sorry if I'm a pain in the @ss, I just want to understand and the S4 wiki doesn't explain everything (in some instances it raises more questions... NOT saying it sucks by any means!) and the FR prettymuch explains how everything works inside the EMS and what coincides with the maps and such. It also only shows what the x and y values are (maybe I missread something and missed where it shows what the z values are suppossed to be?) I dunno
 
Before I ask a question I look for the answer in these references and throughout the nefmoto forum using it's search box. Unfortunatly, there isn't a section in the forum on how to use WinOls or Tuner Pro including how to properly interpret the values that show up in the maps, or a legend of map axis symbols to values conversions (ex: %=load, U/pm=rpm, V=volts, z value of 1.0079=1.0079 lambda, etc) or which definition files are compatable with what versions of WinOls, or how to generate definition files, or how to locate maps in the hexdump without a definition file, or establish a new map previously undefined in a definition file.

A section with this info I believe, would be a nice addition and would clear up alot of confusion. Too bad I don't know the answers, otherwise I would write it up. Undecided



edit: typo
« Last Edit: August 19, 2012, 10:46:01 PM by userpike » Logged
phila_dot
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« Reply #54 on: August 19, 2012, 06:20:29 PM »

All the answers come with experience.

It is impossible to cover every small detail. It just comes with time and understanding.

If there is something SPECIFIC that you don't understand...ask.
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userpike
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« Reply #55 on: August 19, 2012, 11:25:14 PM »

All the answers come with experience.

It is impossible to cover every small detail. It just comes with time and understanding.

If there is something SPECIFIC that you don't understand...ask.

If you can help out with anything in my last post, you'll be my hero.

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