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4.8 and 4.8.1 bug on extrapolate


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I was making a base ignition base map for my new tune and noticed that the is a bug on extrapolate feature . Whenever i try to extrapolate in any direction in my fuel and ignition map im constant getting the error 'Col address out of bounds' or 'Row address out of bounds' After messing some hours with base maps that haven't the problem that my map had and trying to reproduce the problem plus checking and comparing the content of the map export file between one base map that doesnt have the problem and my map that have it i found the reason behind this bug. The reason is that whenever you use a full resolution map , fuel or ignition and by mean full resolution i mean 22x20 map the extrapolate feature doesnt work as it should . What is rly happening is that it pops out the error window and you have to click it many times ( i think the number of your rows or cols ) and after that it make the calculation . Other than that there is something more that i wish Ashley could implement about extrapolate. I wish there is a way that the extrapolate feature to take in mind row or col values that it isnt there in the calculation. What i mean is let say that my Y axis MGP going -80 -40 0 10 20 30 50 60 70 and say that i pick the whole '20 mgp' row and extrapolate down my values gonna be quite close for the '30' row but the '50' will take values that correspond better for the '40' row if it was there , in other words '50' row values will be smaller than it should. Thank you very much i hope i helped with this small bug. I also send you a email asking about a solution before i found the answer.

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Thanks heaps for taking the time to test and report that bug. It has now been fixed and will be part of the next PCLink release. Fortunately only the annoying message boxes pop up and there is no corruption of data to the table. As for your other feature request, I am not 100% sure what you mean. Are you suggesting that we do a weighted extrapolation so that the amount it increases by depends on the difference between the column values?

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Exactly Ashley !!! Because as it now you can use extrapolate only on the part of your map that every next row or col increase in fixed steps like 2000 2500 3000 3500 if i use anything else that it isnt increase in 500 rpm steps then the extrapolate will not make values close to ideal , and not only that but any value after this is going to be 'wrong' even if i continue with 500 rpm fixed steps. The logic behind this is to make a base map faster let say that you tune your vacuum and the 10 , 20 mgp cols from idle to the red line then if your ignition timing decrease in a specific way you can extrapolate the 20 mgp col down and your numbers are going to be very close to the tuned ones :) After this you will only need to make fine adjustments. This is nice so that you dont need to do the maths on excel or with your mind and keep quicktune on the dyno on parts of the map where your car doesnt get too much stress :) Im having some thoughts about an even more advanced 'extrapolate' that take in mind the way ( in a fixed way , if it is linear, etc ) that your ignition timing is changing and adjust the values properly . This can be done with some work on excel so i bet you can implement them to pc link too . Thank you

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Now that im thinking a bit more about it you can even make a feature that you can tune some cells like the 0 mgp row and maybe mgp 10 row from 2000 rpm to 5000 rpm and then if you dont have variable cams that need different fuel when varying the overlap you can make all the rest map filled with values by logic based on your tuned ones. From idle to the red line and from full vacuum to full boost. But even if you have variable cams or big ones or even a huge turbo that gonna make your tuned values to differ too much in some parts of your map even though you will have a much better starting point . Thank you

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