RomRaider

This is what i did to fine tune the fuel map after using pazis method to get a close estimation of the map i need.

On the first sheet you can paste straight from the RR log.
I have two O2 sensors so i average those STFTs for each datapoint.

The second sheet is the brute force attempt at building the fuel trim map from the logged STFTs.
It checks each log-row and is "activated" for the according load/rpm cell. Then for each cell of the map the average STFT is calculated and if this cell was hit more than x amount the change gets apllied with a factor of x%.
In thh example changes get only applied if the cell was hit more than 75 times and those changes get applied only by 50 %. I played with those two values allowing less change with each iteration while doing longer logs towards the end.

I set LTFT to -1% and +1% to keep that from screwing with me to much on longer drives. As well as pazis recomendations (WOT, COP etc.)

Working with this excel sheet and long logs performance on my main rig was a bit s*** to be honest. File went way over 100 mb...

What do you guys think?

I went through this thread and adjusted my base tune accordingly.
one question:

if i follow Pazi's discription, I will rescale/change my load axis after logging, and leave it stock before logging right?

this way I can do a proper scalling for my Load axis with IPW's that i have found in my log.

what will the ECU do when i will be out of my load axis during this first run?
for example, when my max load axis goes to 650mg/stroke, but i get 1200mg/stroke at 4000rpm. how will the ECU determine what ignition timing and IPW to run?

will it use the relations that are inside of the fuel and ignition base table limits to calculate a logic value for when it is outside of the table?

You can do axis rescaling before or after. It doesn't matter if the axis is enough for basic logging. If the load is higher than map axis the ecu will just repeat the last value. But if the load is 1200mg/st the ipw will half because of that 1024mg/st limit.

So,

no idea if this can be of use for anyone, and i might have been explained somewhere else.
But I used Pazi's method to make an educated guess on how to rescale my
Fueling table, and thought it was nice to share my method with you.
al I am doing atm is writing a base tune that i can adjust and tweak when i get my car back.

I took the stock fuel injection base map, and took the values for Load and IPW's related.
I than created a scatter graph for every RPM range.



The green are the values from the stock Fuel Injection - Base table. I have put in the other values to check the variation between the stock values and my calculated values.

for all RPM ranges it showed that the stock tune is very linear, except for the lowest loads.
for the "lower" load values (up to the 700mg/stroke) I used what was allready in the base map.
for the loads in my scaling that are not in the stock table i used these formula's to calculate my IPW's.

I know that this will nog give me a "ready" tune, and will have to start logging to get this right.

*I will work with the WOT enrichment to add more fuel where needed.
**calculated with a HPX-E maf in mind, expected max load is approx. 2000mg/stroke. between 2500 and 3000RPM.
i will devide my load/airflow related values by 2 to not exceed the load limit. this will give me some maxed out values in my MAF scaling, but i will never reach these high numbers.

Hello guys, I've calculated my cards for Fuel Injection - Base, Fuel Injection - Cranking - Initial, Fuel Injection- Cranking. The difference in engine behavior is enormous. then I adjusted the full throttle to 14.8% of the original table, now I can say that the engine behaves as it should ... Thanks to Pazi 88 I have learned a lot.

But I want to ask I had to add 15% of the original table or raise it to 15%

I've had a lot of detonations before I'm fine now, I'm going to set it TPS to 50% For test...


I follow with interest.
Greetings

Hi All,
does anyone have an idea how to tune the Vanos Correction Map - Fuel,
how can i find if the vanos is on or off using Vanos Angle?

Hallo together,

I'm new here since November 2017 and I like tu tune my 328i 96 EU with m50 Manifold.
I've learned a lot here. There was for nearly every problem a losution in this forum.
But now I'm stock.

I've a problem with using MAF scaling v2.4.2 to LoadComp
I think it's because of Stock AFR values. I think there are no such value in the MS41 so I tried to use * Lambda Integrator - Bank 1 (%) instead.
But there is always an error "Invalid value for MP, row 101" if I press "GO"

How do you managed this problem?

Best regards

Hello enthusiasts I also want to share my method if it is useful (or if it is wrong to fix me).

1. Make sure the car does not have a problem with the probes and does not take air from somewhere.

2. Enter Adaptive Fuel Learning and Open Adaptive Fuel Learning - Minimum ECT. There I set a 105 degree value (temperature that the engine will not achieve if it is ok) This change will exclude the LTFT. A computer will only work with the STFT.

3. We expect to warm up the engine optimally. We start logging in - we need 4 values - Load, RPM and Lambda Integrator 1 and 2

4. Then open the logos with the mafcalling program.

1. Load the log
2. Specify the axes for X to select the load.
3. For Y, you select the RPM
4. Here you choose lambda integrators
5. We choose Mean
6. Here we point out the program to show us the cells through which the engine has passed a certain number of times.
7. Here we have to specify the axes on which to stretch the logos

8. We give GO and the program will show us how much fuel has added or removed the computer in a given load relative to RPM

Typically, values must be in percentages. I used the multiplier in the RR but on the next log I saw that the values pretty much fled in another direction. Perhaps the data is not very accurate. For 25 %

Now I'm going to charge the old fuel map and I'll compare the percentages, and I'll adjust to see if it's more accurate.

The other thing I doubt is the acceleration tables, whether they do not interfere. because at times I quickly push the gas pedal.

just for comparison I upload before and after treatment with the sting method.





Greetings to all.

What is the MAX IPW that can be input. I only ask this as in my base fueling i have a 23% increase over the stock fueling IPW in the top end cells but when i hit those cells in WOT conditions the fueling leans out back to 14.7AFR. am i increasing the base fueling to much therefor reverts to a default 14.7afr range, Please note i am not using WOT enrichment and all fueling in tuned in base fuleing map.

There is no such thing as max ipw. There is max duty that is recommended to use. 80% duty is max safe and 90% duty is high as you should go. You can use rpm to calculate the max ipw for 80% duty for example. Or take your rpm and ipw curves to excel and calculate duty curve from those. You can find calculators and formulas using google.

If you are running stock cams, there is no problem using stock injectors. Those are not even close to maxing out. There is probaply just something wrong with your tune/maf.

Yep, After looking at Logs the MAF seems weak, looks like new MAF needed

Hi,
i use attached spreadsheet created by me to visualize the STFT's

Bump!

Have been getting questions about this through PM so time to bring this back to first page.

I still use same method for fuel map tuning so no changes. Just fixed the broken picture links. Also works for ms42 and ms43. But you need to use the formula for all fuel maps because there is several in those.

i Found a Fuel Map tuning Tool which works with CSV data, looks promising

https://hitsov.wixsite.com/fueltune

Looks very interesting. Might have to test it out.


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