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Author Topic: Nefmoto community project: Stage1 1.8t ME7.5 A4 (8E0909518AK-0003)  (Read 224452 times)
thelastleroy
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This thread is for those who are looking to learn how to tune their own *stock* 1.8t engine. All modifications to the software are tested and worked out on stock hardware.

This is a community project; I started this thread to show a progression through the self-tuning process, helped along by the more experienced tuners on nefmoto. This will show my path in learing the basics (still learning everyday) as well as some of the obstacles you will be up against with the 1.8t.

The original (stock) .bin file and tunerpro definition file we are discussing are found below. The *latest* tuned file is also below. Please note that this tuned file for 94 octane gas, which may not be available depending on your location. If you use lesser octane fuel you will need to make changes to the fueling and timing maps. Any improvements or versions for different fuel etc are welcome.
 
Happy hunting
« Last Edit: February 02, 2015, 08:48:36 AM by thelastleroy » Logged
thelastleroy
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« Reply #1 on: October 02, 2014, 07:19:04 PM »

I'm basically trying to use the community 2.7t project as a guide since the maps work the same for ME7.5. I'm stuck with the fuel adjustments right now: how do I get the axis values for LAMFA to look this way, and what is the actual FR name for the "pedal position for desired air/fuel ratio" map?

« Last Edit: November 21, 2014, 09:06:49 PM by thelastleroy » Logged
armageddon
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« Reply #2 on: October 03, 2014, 05:42:49 AM »

Hey guys,

I'm trying to adapt what I'm reading in the 2.7 thread to my 1.8t A4.  I'm stuck with the fuel adjustments right now: how do I get the axis values for LAMFA to look this way, and what is the actual FR name for the "pedal position for desired air/fuel ratio" map?

If it makes more sense I'll start a new thread. I'm basically trying to use the community 2.7t project as a guide since the maps work the same for ME7.5. The community project xdf parameter names are actually a bit hard for me to compare to my xdf file. Want to start a community project 1.8t version? I'm sure a lot of the "same old" tuning questions could be summed up and clarified for the A4 and Volkswagen crowd that are just starting out, and would be satisfied with a simple stage 1.

"pedal position for desired air/fuel ratio" map on the xdf you post is LAMFA_COLAXIS
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thelastleroy
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« Reply #3 on: October 04, 2014, 05:41:50 AM »

Thanks armageddon. I've got the LAMFA_COLAXIS units adjusted to match the 2.7t values, and now I'm going to adjust LAMFA values. Trouble is, my LAMFA table isn't in units of AFR, it's in lambda. How can I change my LAMFA definition to read in AFR? To me it's easier to grasp, especially when you can compare your target numbers with a stanalone wideband sensor.

Here's a screen of where I'm at
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ddillenger
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« Reply #4 on: October 04, 2014, 05:46:25 AM »

Thanks armageddon. I've got the LAMFA_COLAXIS units adjusted to match the 2.7t values, and now I'm going to adjust LAMFA values. Trouble is, my LAMFA table isn't in units of AFR, it's in lambda. How can I change my LAMFA definition to read in AFR? To me it's easier to grasp, especially when you can compare your target numbers with a stanalone wideband sensor.

Here's a screen of where I'm at

Look at the factor I used in the 2.7 xdf, copy that into your 1.8 xdf.
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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 experience!

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thelastleroy
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« Reply #5 on: October 04, 2014, 06:01:12 AM »

Thanks DDillenger!

I created a new table to make sure I don't mess up the original. By factor do you mean the equation in the conversion tab? Looks like I've got it sorted now. Oh, and I'm going to need to define LDRXN which is not in my XDF. I'm not very good with WINOLS yet, so if someone could throw me a bone and tell me the address I'll copy the table info from another xdf and try to add it.
« Last Edit: October 04, 2014, 07:36:05 AM by thelastleroy » Logged
SB_GLI
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« Reply #6 on: October 04, 2014, 08:08:08 AM »

kfdluls is incorrect in that def, though I have not looked into it myself to correct it.

Here are other maps that you will need for a stage I tune:

Address;Name;Size
"$29734";"(LDRXN) Maximum Load";"16x1"
"$29776";"(LDRXNZK) Maximum Load under Knock";"16x1"
"$12856";"(KFZW) Ignition Advance Lookup Table";"12x16"
"$12916";"(KFZW2) Ignition Advance Lookup Table Variant 2";"12x16"
"$29402";"(KFLDHBN) Boost Pressure Limit(Max. Pressure Ratio)";"8x8"

ldrxn/zk rpm axis; $29714 (0.250000 * x)
ldrxn conv; (0.023438 * x)

kfzw rpm axis;  $138DE (0.250000 * X)
kfzw load axis; $13986 (0.023438 * x)
kfzw conv; (.750000 * X)

hbn rpm axis; $293F2 (40.00000 * x)
hbn Grad C axis;  $293FA (0.750000 * x)
hbn conv; (0.015625 * X)
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SB_GLI
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« Reply #7 on: October 04, 2014, 08:14:13 AM »

Also, I would suggest getting used to using lambda values over AFR values.

Here's what I use for reference when I don't feel like doing math:

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SB_GLI
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« Reply #8 on: October 04, 2014, 08:39:29 AM »

Updated xdf to include LDRXN/ZK, KFZW/2, and KFLDHBN

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thelastleroy
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« Reply #9 on: October 04, 2014, 08:57:14 AM »

You're a prince
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nyet
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« Reply #10 on: October 04, 2014, 11:31:43 AM »

Also, I would suggest getting used to using lambda values over AFR values.

I generally double up LAMFA and BTS maps, one in lambda, one in AFR
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

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 experience.
thelastleroy
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« Reply #11 on: October 05, 2014, 05:48:04 AM »

Well I've been working away, and now I realize I've made a balls-up. I bought the MTX tunerpro plugin when I read my original file, and the license is only good for that file or its variants. I can't actually correct the checksums on the 518AK file once I've modified it! I went with the 518ak file because it was hard to find a decent xdf for my original.

I tried me7sum, but it failed. Now I'm faced with the choice of starting over with my original file, or buy the "commercial" license from MTX..... Angry
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SB_GLI
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« Reply #12 on: October 05, 2014, 06:41:14 AM »

Well I've been working away, and now I realize I've made a balls-up. I bought the MTX tunerpro plugin when I read my original file, and the license is only good for that file or its variants. I can't actually correct the checksums on the 518AK file once I've modified it! I went with the 518ak file because it was hard to find a decent xdf for my original.

I tried me7sum, but it failed. Now I'm faced with the choice of starting over with my original file, or buy the "commercial" license from MTX..... Angry

I'm not so sure that's how the MTX license works. Isn't it licensed to a specific PC?  I know there's two different plugins though.  For what's it's worth, the MTX license did not work for my 2004 Jetta (032 PL).  I am not sure how it would work with this 518AK, but I can try it.  I would get the RSA signature error in ME7 Check, and although you my find mutterings that that error is irrelevant on here, that's not true.  I had my ecu lock me out several times, a week or two after the initial flash.

In the meantime, I can checksum some revisions for you to keep this thread rolling.
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SB_GLI
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« Reply #13 on: October 05, 2014, 06:52:53 AM »

Just tried the MTX plugin on this file and it does not work.  RSA signature error.  You will have to find an alternate method of correcting checksums with this file.
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thelastleroy
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« Reply #14 on: October 05, 2014, 07:13:06 AM »

Strangely enough, I have an "alternate" choice xdf and bin for 8e0909518ak that i can correct with my MTX plugin, and will run on my car. I chose to use the .bin/xdf in the original post because it came recommended to me. Not sure where to go with this, If I use the "alternate" 518ak xdf, it will need some streamlining. Too many maps for stage 1 and a little confusing for newbs Embarrassed. Here's the "alternate" files, I found them here on Nef...

*edit: I have removed these files which are not correct for the thread.*
« Last Edit: October 06, 2014, 05:23:33 PM by thelastleroy » Logged
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