So high/low octane maps for both fuel and timing, correct?

**note** If you edit the axis values for the high octane map, the low octane map's axis values are also changed. So you may want to change the actual table values first, before you edit the axis ... or make real sure you have a backup of your hex file.

I'm going to add a 280 and 300 column and do a couple of runs to see if the ECU will use the given values. Judging by my past runs it should at least hit the 280 load cells.

l8r)

 

I would try it after you back up your original map.. I saw some data from another post that shows this does actually work..

Basically you can set it up however you need, but remember to alter the maps itself accordingly..

But basically I meant is change the 260 column to 300, then use the interpolate function to rescale the entire row.. Then I went and rounded the values so they look more "Pleasant" (and easier for me to find in a raw hex file)

So instead of 0-10-20-30-40 through 260.. It would go 0-20-40-60 etc.. However you want to get it to fit.. I don't have a snapshot of mine, but there are two other threads on here that show how it was done.

Let me add that I have not gotten any conclusive data on my own car, or my friends car, that this actually works, his car was too close to being stock, and mine isn't drivable at the moment.. But I did see a few maps on here that supposedly worked, and saw the Ralliart ECU rom that has two columns "Dropped" and replaced with two higher values..

 

You should leave the resolution in most nonlinear parts and most important parts of the map. If u see a linear part - u could use bigger step. I hope the values ,if they are between cells are linearly aproximated-so if u have a linear part like
10 20 30
4 5 6
u could delete 20 col without losses in resolution.

I suggest to skip 1 col in the middle part and decrease the values in the last col and change its value to 360. It will fit most overboost/big turbo configs.
Excel rules - make the 3d surface from the original and modified table.

 

is there any posts that give direction on how to do this? I plan on adding alky in the not so distant future and would like to rescale my values.

 

I can help you out man,

I'm about to post my results in my knock problem thread.

 

dont know if this will help any but I did read that the freq pulse (airflow) part of MAF will get reset by the ECU when TPS signals it (off throttle)

 

Wow. Good info here.

 

Using the interpolate function won't work for a row of non-linear values though, right? It seems like it adjusts the row to a set of linear values between the lowest and highest cell.

l8r)

 

I'm having the exact same timing pulling problem on my car. In fact, I was just at AMS last Tuesday when it was discovered during a tune. I need to get in touch with Martin and find out if they found a solution for the other guy and if my car has the same issue. . .

 

I found that if you start the pull from 3500 rpm or above, It seemed to lessen the calculated load(bit less than 240) whether engine, water or air is hot or not. But if you start the pull from below the 2500, it pulls the timing too much( way over 260). It seems that ECU gets very sensitive about water or air or engine temperature also.

 

Of course.. I mean, it will create a linear interpolation from the beginning cell to the ending cell.. And you can work from there.. Or you "Squeeze out" the less important load columns and add the columns you need at the end.. Depends on where you need the resolution for what your doing..

 

I think the speed of the Delta-Change is also taken into account, for instance, a much lower load, to a much higher load, in a short period of time may look like the pattern of an impending overboost condition and the ECU may want to react to that more severely than a boost spike from a slightly lower load to higher load.. Get it?

 

Ok, I went out and rescaled my timing and fuel tables to the same scale as the Ralliart ECU. I haven't had a chance to analyze the logs yet, but the rescaling definitely did not have any negative effects. I'll post results later ... at the moment wife > looking at logs.

l8r)

 

Just looking at a snapshot of ECU flash anyone know what the "boost enhancment (anti lag) start RPM" does and how its adjustment may improve performance? Could you set your boost to come in sooner or later?

 

as far as we know, at the moment it has no function on the USDM cars.. I think Jason found a few tables related to it for timing and fuel compensations, but I do know the air injection hardware and solenoids aren't on the USDM cars.