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Old 03-22-2006, 02:55 PM   #1
KeyPirate
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Default Yet another noob AP question (groan)

I have heard rumors that Subaru may be upgrading/improving the closed loop idle logic for drive by wire cars (check some of the other threads). How can AP users take advantage of the coding upgrade if we are currently running Cobb maps?

Does this mean we will have to wait for Cobb to integrate the new code into revised Cobb maps, or could we revert to stock, let Subaru do their thing, and then overlay a Cobb map on top of the revised OEM map?

RickH
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Old 03-22-2006, 03:53 PM   #2
Freon
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The Cobb maps overlay the whole factory code. Much of the code is probably the same in the end, but when you flash an ECU the entire flash ROM is written. I do think it may be technically possible to only write large chunks of the flash ROM, but I don't think that is at all viable or makes sense in this circumstance. There is enough changed on the Cobb maps I don't think you'd want to try. I doubt the AP is capable of this, either. I'm guessing it always does a 100% write, regardless, since it is potentially dangerous to write only part of the ROM. Cobb does do some code reconstruction to make their "realtime" map stuff work, not to mention a given tune may have maps that really need to be tweaked together to work properly. WG duty and boost for instance.

If the Cobb maps are not already superior to begin with, they would have to go back and tweak the maps with the new code. I think all the Cobb maps include the open/closed loop issue fixes. Not sure specifically what upgrade or improvement you are referencing, though, so who knows.
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Old 03-22-2006, 04:17 PM   #3
Jon [in CT]
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Quote:
Originally Posted by KeyPirate
Does this mean we will have to wait for Cobb to integrate the new code into revised Cobb maps, or could we revert to stock, let Subaru do their thing, and then overlay a Cobb map on top of the revised OEM map?
It's unlikely Cobb will ever upgrade the microcode level on which its existing maps are based. It's even more unlikely they will ever be able to come up with a method that is able to hook itself into unknown microcode.

Since the current AccessPort doesn't ever save your existing ROM image, installing AccessPort after you get a reflash from Subaru will regress your microcode's level and you'll won't be able to restore it to the level it was at before you installed AccessPort.
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