learning curve
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learning curve
the question i have is after you install your new tune and the learning curve finishes doing its thing what happens if you change to a differant program does the learning curve start over again
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Joined: Mar 1998
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From: Virginia
Hi Poptop,
That's an excellent question, and one that has been discussed here frequently on & off over the years, so it's easily available via the SEARCH feature. I'll give you some brief info for now, and then if you want more details, just look it up via SEARCH..........
To a certain extent, yes - for example, you do clear out the previous adaptive strategy adjustments made by the PCM whenever you reflash it with a different program, absolutely.
However, it seems that some of the basic "relearn cycle" issues are not quite as obvious (sometimes not at all) as they can be the very first time you install the performance tuning, when you do *subsequent* reflashes - mostly because you're not making as much change going from one performance tune to the next compared to all the changes between bone-stock factory tuning and performance tuning. That's not completely 100% technically correct, but from an informal observational standpoint, it's close enough for our purposes of discussion here.
In some vehicles, you don't seem to get any "relearn symptoms" that are noticeable to the driver at all - while in other vehicles, the relearn seems more obvious - there is certainly a fair amount of variance there. One thing that is ALWAYS in effect is the fact that if you change tunes at the drag strip, for example, it will take oh, anywhere form 4 to maybe a half-dozen or more repeated passes down the 1/4 mile to get the full 100% performance difference between the two different tunes each time you change programs - whether you're reflashing the PCM or using a multi-program chip and just turning the **** to effect an instant program change. So yes, that does generally affect absolute *peak* power and WOT performance. But whether you will actually *notice* anything in terms of general seat-of-the-pants response or symptom-wise (like a bit of fluctuation in idle speed & quality, or in auto tranny shift firmness etc.), really varies from one vehicle to the next, even with 2 vehicles that are identical & have the same computer code.
I hope that gives you the basic answer you were looking for.........
That's an excellent question, and one that has been discussed here frequently on & off over the years, so it's easily available via the SEARCH feature. I'll give you some brief info for now, and then if you want more details, just look it up via SEARCH..........
To a certain extent, yes - for example, you do clear out the previous adaptive strategy adjustments made by the PCM whenever you reflash it with a different program, absolutely.
However, it seems that some of the basic "relearn cycle" issues are not quite as obvious (sometimes not at all) as they can be the very first time you install the performance tuning, when you do *subsequent* reflashes - mostly because you're not making as much change going from one performance tune to the next compared to all the changes between bone-stock factory tuning and performance tuning. That's not completely 100% technically correct, but from an informal observational standpoint, it's close enough for our purposes of discussion here.
In some vehicles, you don't seem to get any "relearn symptoms" that are noticeable to the driver at all - while in other vehicles, the relearn seems more obvious - there is certainly a fair amount of variance there. One thing that is ALWAYS in effect is the fact that if you change tunes at the drag strip, for example, it will take oh, anywhere form 4 to maybe a half-dozen or more repeated passes down the 1/4 mile to get the full 100% performance difference between the two different tunes each time you change programs - whether you're reflashing the PCM or using a multi-program chip and just turning the **** to effect an instant program change. So yes, that does generally affect absolute *peak* power and WOT performance. But whether you will actually *notice* anything in terms of general seat-of-the-pants response or symptom-wise (like a bit of fluctuation in idle speed & quality, or in auto tranny shift firmness etc.), really varies from one vehicle to the next, even with 2 vehicles that are identical & have the same computer code.
I hope that gives you the basic answer you were looking for.........