Maptuner X My Map Editor

[AllanK]

Hello All,

I'm trying to workout what all the maps in the MyMapEditor software actually do. There is very little information online.

• MS Correction table 1/22

I'm trying to understand these maps and how they relate to the injectors. They have a large effect on fuel. Is one for injector timing ? Why the two tables and what do the values in the tables represent ?

• Lambda map 1

Is this map to set your target AFR/Lambda values ? Do you then tune the VE/Fuel tables so that the target is actually reached. You can then change the target AFR/Lambda table without touching the VE/Fuel tables.

• Ignition maps 1, 2 & 3.

Are these ignition maps for cylinders 1,2 & 3 ? or are they for Eco, Normal & Sports mode ?

Cheers, Al

[JESUS G]

Please send me an email and I will explain you how to work with the editor.
[email protected]

Hello All,

I'm trying to workout what all the maps in the MyMapEditor software actually do. There is very little information online.

• MS Correction table 1/22

I'm trying to understand these maps and how they relate to the injectors. They have a large effect on fuel. Is one for injector timing ? Why the two tables and what do the values in the tables represent ?

• Lambda map 1

Is this map to set your target AFR/Lambda values ? Do you then tune the VE/Fuel tables so that the target is actually reached. You can then change the target AFR/Lambda table without touching the VE/Fuel tables.

• Ignition maps 1, 2 & 3.

Are these ignition maps for cylinders 1,2 & 3 ? or are they for Eco, Normal & Sports mode ?

Cheers, Al

[wasnitrous]

Please share with all.

[ptscon]

What does the "Use" button do? I don't remember seeing that before.

[JESUS G]

• MS Correction table 1/22

I'm trying to understand these maps and how they relate to the injectors. They have a large effect on fuel. Is one for injector timing ? Why the two tables and what do the values in the tables represent ?Those tables control the injector pulse. Those are the best tables to adjust fueling, need to be adjusted by% in the entire RPM column. You need to make same changes in both tables

• Lambda map 1

Is this map to set your target AFR/Lambda values ? Do you then tune the VE/Fuel tables so that the target is actually reached. You can then change the target AFR/Lambda table without touching the VE/Fuel tables. Lambda tables actually work like a fuel trim. so you can adjust fuel using those tables too, only thing to keep in mind is that the work in the opposite way. So increasing those numbers you will lean up the fueling , and decreasing those numbers you will put more fuel.

• Ignition maps 1, 2 & 3.

Are these ignition maps for cylinders 1,2 & 3 ? or are they for Eco, Normal & Sports mode ? No, They are different tables based in the different models ( USA model, Australian model and International model, You need to set the same timing in all of them.

[ptscon]

Good info, this should be included in the mapeditor app itself.

[AllanK]

Thank you Jesus for you feedback and email support. Very much appreciated.
I now have a better understanding what some of the maps are for.

For me, I'm not just trying to get my ski dialled in, its more wanting to learn about EFI Tuning (hands on). I've done the theory for the last year, now for the fun...

I going to try the following to see if I can get the VE fuel tables dialled in without making to many test runs.

1. Setup the Desired Lambda tables in My Map Editor. Lambda is just the ratio of actual AFR to stoichiometry for a given mixture. So for Gasoline, Lambda = AFR / 14.7
2. Log data from my ski using Maptuner X and PLX Data logger.
3. In Megalog Viewer HD, setup custom field name: Lambda. Maptuner X logs AFR's, so AFR / 14.7. It also logs the Desired Lambda.
4. Setup histogram / table generator with X & Y axis to match the VE fuel table in My Map Editor. I also created a custom field name: VE correction factor which = Lambda / Desired Lambda which I setup to the Z axis.
5. I then copy the correction factor data from Megalog Viewer into excel (Table 1)
6. Copy the current VE Fuel table from My Map editor and paste as a second table below the first (Table 2)
7. Create a third (3rd) table in Excel called VE Fuel table (Adjusted) and add a formula to each cell: Correction factor x VE fuel table or (Table 1 x Table 2)
8. I then copy this third (3rd) table data and paste into the VE fuel tables in My Map Editor.

Should work....

The example data is just from my stock ski and tune. Images attached.

[ptscon]

Not sure if I'm following you but it seems you're targeting 14.7 ?

You don't want to run anywhere near that lean especially above 6000 RPM when positive boost kicks in. You can search around and see what the common AFRs are through the entire RPM band but you will not find anything close to 14.7

My approximate targets are:

Idle : mid-high 13s
to 6000 I slowly taper down to low 13s
to 7000 I want to taper down to 13 flat
to 8000 I want to be touching high 12s with a touch of 13 is ok
to 8500 I want to be mid 12s
to 8900 I want to be low 12s


This is just my personal preference, some people will run leaner/richer at various RPMs, definitely no 14.7 anywhere basically. These numbers also depend on how much boost and timing you're running at the high RPMs.

[AllanK]

Hi ptscon,

I'm not trying to target 14.7 through the entire RPM band. I'm creating a correction factor to apply to the VE fuel table to bring AFR's to match my desired target table (Lambda table).
Once the VE fuel table is set up, I should be able to then adjust my target AFR table (Lambda table) without having to go back and forth adjusting the fuel table.
The only time I would need to adjust the VE fuel table is if the volumetric efficiency of the engine would change, (intake mod, bigger supercharger, cam etc)

[ptscon]

Our ECUs use standard fueling, not modeled (VE). Jesus mentioned that the Lambda tables act as a trim.

I think the Lambda tables are there to allow more fine tuning of fueling in spots that don't exist on regular fuel table.

Eg. regular fuel table will have 5850 and 6150 RPM columns, lambda table has 5800 and 6000 available.

I've never used these lambda tables, they are new, but I know that 6000 RPM spot is like a Bermuda triangle. I always get weird numbers around that spot, might play around with the lambda option now.


Maybe they can mimic modeled fueling but not sure, has anyone done this before? Would be pretty neat if this was true.

[1tommygunner1927]

Not sure if I'm following you but it seems you're targeting 14.7 ?

You don't want to run anywhere near that lean especially above 6000 RPM when positive boost kicks in. You can search around and see what the common AFRs are through the entire RPM band but you will not find anything close to 14.7

My approximate targets are:

Idle : mid-high 13s
to 6000 I slowly taper down to low 13s
to 7000 I want to taper down to 13 flat
to 8000 I want to be touching high 12s with a touch of 13 is ok
to 8500 I want to be mid 12s
to 8900 I want to be low 12s


This is just my personal preference, some people will run leaner/richer at various RPMs, definitely no 14.7 anywhere basically. These numbers also depend on how much boost and timing you're running at the high RPMs.

Good summary! Ignition timing for 260's is different than 300's.

On a stock 2013 TX adding MoTeC 130 only with a 8350 tune and an O2 sensor:

[AllanK]

Our ECUs use standard fueling, not modeled (VE). Jesus mentioned that the Lambda tables act as a trim.

I think the Lambda tables are there to allow more fine tuning of fueling in spots that don't exist on regular fuel table.

Eg. regular fuel table will have 5850 and 6150 RPM columns, lambda table has 5800 and 6000 available.

I've never used these lambda tables, they are new, but I know that 6000 RPM spot is like a Bermuda triangle. I always get weird numbers around that spot, might play around with the lambda option now.


Maybe they can mimic modeled fueling but not sure, has anyone done this before? Would be pretty neat if this was true.

VTECH refers to to the fuel map as a VE table in this post back in 2014.

http://greenhulk.net/forums/showthread.php?t=220203

[ptscon]

VTECH refers to to the fuel map as a VE table in this post back in 2014.
http://greenhulk.net/forums/showthread.php?t=220203

Not sure why they call it that, the numbers in the fuel table do not look like something you would see in a VE table on a stand alone ECU.

I've done VE tuning on Link ECU (Vipec) and if my idle VE was say 67 than my WOT at 8900 and 18PSI was around 113. In comparison my flash map would idle at 27 and WOT in 175 range, that's a 650% increase. If this is a VE table than there's some weird calculations happening behind the scenes.

[AllanK]

Not sure why they call it that, the numbers in the fuel table do not look like something you would see in a VE table on a stand alone ECU.

I've done VE tuning on Link ECU (Vipec) and if my idle VE was say 67 than my WOT at 8900 and 18PSI was around 113. In comparison my flash map would idle at 27 and WOT in 175 range, that's a 650% increase. If this is a VE table than there's some weird calculations happening behind the scenes.

The following is some notes I've taken from a few recent EFI tuning courses I've completed (High Performance Academy) and may explain the VE base fuel model better.

Volumetric efficiency expresses the volume of air flowing through the engine as a percentage of the theoretical perfect airflow.
A VE Base fuel table has nothing to do with fuel delivery, this table is defining the mass of air entering the engine as a percentage.
With a VE based fuel model we need to go to our target table and we need to correctly fill this table out with our desired AFR's. This table now actually becomes a critical aspect of how the ECU operates because its going to be referencing the target table and VE table when it decides on what injection pulse width to deliver to the engine.

The first step is to correctly setup the target table / desired AFR's.
The second step would be to tune the numbers in the volumetric efficiency table (fuel table) until our measured air fuel ratio matches our desired AFR's.

Once were done correctly tuning the VE table, and we want to see want the engine would perform like at a different AFR, we can simply make changes to the target table and the EUC will adjust the required injection pulse width automatically to achieve our new air fuel ratio / target. It makes it incredibly easy to make changes without needing to touch the VE table.

**Now I am not saying that the tables in our skis are a volumetric efficiency table and the Lambda table is target table, but it sure looks like that to me. Over the next few weeks, I'm going to test out tuning my ski as per above. I'm also going to to test tuning using the correction factor and excel tables as per my previous posts...

[AllanK]

What does the "Use" button do? I don't remember seeing that before.

If the "USE" button is not selected when saving the file, any changes made to the map are not saved. It also places an asterisk * at the end of the map name and file name.


Played around with the Ignition advanced maps 1,2 & 3 today.
On my ski, which is a RXT-X 260 2013 (Australian model) only changes made to "Ignition Advanced 2" map seemed to have an effect on ignition timing.
I checked this by first changing all ignition timing maps to 20deg at idle. I then adjusted timing to 25deg at idle one map at a time and checked ignition timing.
I think I will still copy ignition timing to the other two maps....