OFT Basic tuning procedure

[vgi]

Originally Posted by solidONE

Thanks!

Still Trying to figure out the smoothing function and graph. What's up with all the squiggly lines? Also, It would be nice to be able to make changes to the scale without having to go into the smoothing mode with the squiggly lines.

use the RTFM principle, it really helps

there is a usage tab which you should take a look at. in there you could see that smoothing and manual correction is more of a tool for advance users for fine-tuning the curve. you don't have to go there and use it. just copy the values from result table into your maf table. if you still want some smoothing of the curve just use 3 and and that's it. don't forget to get to better maf curve with minimum corrections you might need to run the scaling few times (log-scale-flash) once you see there are no more improvements on your corrections plot - you're done.

[solidONE]

Originally Posted by vgi

use the RTFM principle, it really helps

there is a usage tab which you should take a look at. in there you could see that smoothing and manual correction is more of a tool for advance users for fine-tuning the curve. you don't have to go there and use it. just copy the values from result table into your maf table. if you still want some smoothing of the curve just use 3 and and that's it. don't forget to get to better maf curve with minimum corrections you might need to run the scaling few times (log-scale-flash) once you see there are no more improvements on your corrections plot - you're done.

I did apply the RTFM several times, matter fact. Maybe my reading comprehension no so berry good...

I had to go to the smoothing in order change the value in the cells. I also tried to click and drag the points on the graphs and it would not let me do so even with the smoothing function activated. With the smoothing activated, I either highlight the cell and apply smoothing, or manually change the values while staring on the squiggly representations of the current and corrected lines.

I'm applying the second change in the MAF scale using the CL portion of your app as I type this. Very nice of you to share with the class. Thanks again!

[vgi]

Originally Posted by solidONE

I did apply the RTFM several times, matter fact. Maybe my reading comprehension no so berry good...

I had to go to the smoothing in order change the value in the cells. I also tried to click and drag the points on the graphs and it would not let me do so even with the smoothing function activated. With the smoothing activated, I either highlight the cell and apply smoothing, or manually change the values while staring on the squiggly representations of the current and corrected lines.

I'm applying the second change in the MAF scale using the CL portion of your app as I type this. Very nice of you to share with the class. Thanks again!

might be my poor writing skills if you can suggest a better wording of the how-to or any clarifications I'd appreciate it - just send them my way.

Yes, for manual correction for now you need to go to smoothing mode (there will be compare screen which will allow changing values as % correction, currently being tested). The "squiggly lines" are the slope lines, red for original line, green for smoothed line which you can compare. The dragging of points is only enabled on green line. The blue line is the actual smoothed curve which shows you affect of your changes. Green line also shows you changing of slopes reflected by your manual changes of values in cells.

oops, sorry, just noticed that curves descriptions for CL for the smoothing view aren't updated. I'll fix that.

[Kodename47]

@solidONE - a couple of hints:
On the chart view of the curve, if you select the smoothed option on the top left then you can drag points on the line in that view.
When smoothing, on a factor of 3 select one cell more either side than you want to smooth, 5 is 2 cells, 7 is 3 etc. Ie. on a factor of 7, the 1st/last 3 cells wont have correction applied, they are just used to correct the 1st applicable cell.
When you click on the smoothing box on the top right, it displays the corrected curve in blue, the red is the corrections applied to that curve and the green line is the smoothed corrections applied when you click apply. That's how I look at it anyway. The red and green aren't new MAF curves - not to be confused with the current and smoothed curves on the top left. Those are the ones you review once all is done.


The MAF comparison window is working well, it will allow you to review the % changes and edit/copy and paste them to any points. It's also a pop out window so you can do the CL and OL and copy the relevant parts of the table into it and see what the changes are over the original curve.


I think @vgi is close to another decent update roll-out

[vgi]

Originally Posted by Kodename47

@solidONEWhen you click on the smoothing box on the top right, it displays the corrected curve in blue, the red is the corrections applied to that curve and the green line is the smoothed corrections applied when you click apply.

I have described above the lines coloring and I'll fix line descriptions in the graph legend.

Before going any further:
Smoothed curve is a copy of generated corrected curve. This copy is used for manual correction and auto-smoothing so that the generated corre
cted curves stays unchange for reference.

In smoothing view:
Blue - smoothed maf curve, reflects any manual changes on-the-fly.
Red - slope line of OEM/Input maf curve.
Green - slope line of smoothed maf curve.

From math:
Slope of curve is a number which is used to indicate the steepness of a curve at a particular point.
Here calculating of slope for a curve point explained:
cstl.syr.edu/fipse/graphb/unit8/unit8a.html
for maf slope value is calculated between each 2 points as: slope = (y2-y1)/(x2-x1)

[solidONE]

I'm starting to like the squiggly lines. lol Also I've found that it is better to put the smoothed curve somewhere between the current and corrected curves otherwise you will likely overshoot the adjustment. After several hours of logging and 4 different MAF scales I think I've gotten the CL fuel trims to where I like. +- 2% with it being in the negative more of the time than positive. Next I will work on the timing advance.

Also, has anyone else noticed that there seems to be too much compensation for temps in the fueling? In hotter temps fuel trim will go up and when in colder temps computer will start trimming back the fuel, I've noticed while doing a large amount of logging to get the MAF scale dialed in.

[ST-A]

anyone got a safe timing map for a SC car (KW or JR) to start with?
Don't want to blow the engine on the first logging session.

So far i rescaled the maf a bit to get de AFR values closer to target but only with the car stationairy and building slowly revs but no logs actually driving, need to pull timing first me thinks before i go out and go logging.


I'm on the KW C30 charger.

I also changed engin load from 200 to 300 (maf scale stops at 314 now i believe)