ECU reprogramming
Rennlist Member
Joined: Jul 2003
Posts: 1,224
Likes: 31
From: San Diego, CA
Again, read here it explains clearly;
https://rennlist.com/forums/911-foru...-the-myth.html
To further explain what's done and how very simple the so-called "performance tune" is,
a very good analogy is like basically just changing cell values in an Excel spreadsheet.
As an example, at 4K RPM the cell value may have been 28 degrees at a certain engine
load, and now gets changed to 30 degrees. These values are changed over various
operating conditions. It's as simple as that. There's no new OS as the ECM has no typical
OS but just a control program like one would find in your PC printer or scanner.
https://rennlist.com/forums/911-foru...-the-myth.html
To further explain what's done and how very simple the so-called "performance tune" is,
a very good analogy is like basically just changing cell values in an Excel spreadsheet.
As an example, at 4K RPM the cell value may have been 28 degrees at a certain engine
load, and now gets changed to 30 degrees. These values are changed over various
operating conditions. It's as simple as that. There's no new OS as the ECM has no typical
OS but just a control program like one would find in your PC printer or scanner.
Race Car
Joined: May 2003
Posts: 4,224
Likes: 102
From: SoCal
Bottom line: There is no real overall improvement when one needs to increase the
required octane and if the increased required octane is NOT used less "performance"
will result. If this type of mod were really beneficial, then Porsche would have required
the use of a much higher octane ALWAYS and set the ignition timing accordingly.
Again, it's NOT updated firmware like when either iOS/Android or MS/OS is updated.
The firmware operates exactly the same as before, e.g. speed, functionality. The change
being made is a parameter change like minimum swipe speed in iOS or Android.
An analogous type of update for iOS/Android would require that the update needed
a larger internal battery to utilize the update and if the larger internal battery weren't
utilized less performance than previously experienced would result than with the original
battery.
Last edited by Lorenfb; Jan 27, 2015 at 01:08 AM.
Addict
Rennlist Member
Rennlist Member
Joined: May 2001
Posts: 12,808
Likes: 782
The thing that Loren seems to ignore is that when building an oe map Porsche has more constraints than an individual seeking to improve performance, one such constraint is legislative, another is that the lowest common denominator must be met wrt to fuel quality and fuel economy.
