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Cayman ModificationsDiscuss modifications to your Cayman
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When I last checked (several months ago), I was told that after the early build '06 CS' Porsche changed the ECU to reduce memory to a size that wouldn't permit flashing APR's multiple programs, so only 1 could be loaded. Having just a single flash (e.g., 93 octane) defeated the primary benefit of APR's flash for me. There was no ability to select between 93 octane, 91 octane or stock settings.
When I last checked (several months ago), I was told that after the early build '06 CS' Porsche changed the ECU to reduce memory to a size that wouldn't permit flashing APR's multiple programs, so only 1 could be loaded. Having just a single flash (e.g., 93 octane) defeated the primary benefit of APR's flash for me. There was no ability to select between 93 octane, 91 octane or stock settings.
Has anything changed since then?
Man that sucks, Mine is an 06 do you know your DME? maybe now you can, what software are you running?
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Cayman GT
369BHP 325LBSTQ
313WHP 276WTRQ some people like the regular stock factory look, cool people modify the car.
Man that sucks, Mine is an 06 do you know your DME? maybe now you can, what software are you running?
Mine is also an '06, but with a 6/06 build date. Keith had told me they were working on a fix, but IIRC it involved soldering more memory on the ECU. Obviously that wouldn't be a very stealthy solution. So unless there's been a change, and I hope there has, a flash with selectable programming seems to be unavailable for most Caymans.
I'm confused, since the ECU auto adjusts, why not just load a program with maps all the way up to 103 octane and let the car adjust to whatever fuel is in the car???
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I'm confused, since the ECU auto adjusts, why not just load a program with maps all the way up to 103 octane and let the car adjust to whatever fuel is in the car???
Ken, if you'll read post #20 from Keith in the thread linked above, he explains the adjustment range. It's not that broad. My point is that (for me) the raison d'etre for the APR flash is the ability of the user to easily switch between maps optimized for selected octanes, utility maps and a "back to stock" map for dealer visits. AFAIK only APR provides a product with that benefit, but sadly, I was advised not for my car. Still confused?
Yes, because unless the flash is stored externally you cannot flash "back to stock" with any flash that is inside the ECU. What I mean by that is that you can flash your mappings back to stock mappings sure, but because all that other code is still in your ECU if a dealer runs a CVN check in PIWIS your ECU will show up as modified even if you have the stock maps loaded. I'll have to go check Keith's statements on the adjustment range but it is my understanding that you can create a map that goes all the way up to say 103 octane and the ECU will adjust whether you have 91 octane, 95, 100 or 103. I guess it depends on what you are looking for in terms of "stock" and "modified" then.
I just read Keith's statements and what I understand him to say is that you want a map for close to the octane that you put into your car and then let the adaption channels work from there. While I agree that does sound optimal I'm wondering why some ECU tuning designed for 100 octane doesn't seem to have a problem with 91 octane, meaning no pinging, still good power, etc?
APR sent me their cable and flash awhile back but I haven't had a chance to test it yet because of other things that came up with my car, hopefully when I am back from parade I can do some testing, too much to do, too little time...
PIWIS - Porsche Integrated Workshop Information System
Porsche Integrated Workshop Information System (diagnostic tester) This device is used to test various aspects of your Cayman's computer and electronic systems. These units cost over $12,000 to purchase and are connected to Porsche via a wireless connection at the dealership so that your Cayman's information can be sent to Porsche whenever your car is attached for diagnosis. The PIWIS device has the ability to control almost any system in your car provided that your car has the appropriate control units and programming installed. Your dealership may not perform some activities such as disabling safety equipment.
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