In Reply to: Re: Not sure what you mean! posted by Bob ///M3 on September 18, 2000 at 06:13:15:
The conditions as seen by the engine's DME (with all the input signals) must be "willing" to climb to the highest level of that particular fuel map, whether stock or performance. And if the conditions are not at their best the engine's performance will not be at maximum, whether you are using the stock software program or an enhanced performance program.
I am not sure whether he is correct or incorrect, im just stating what he said to warn people. I understand that your fuel maps won't revert back to stock after a while, but what he meant was that the extra fuel maps will be in the ecu, and ready for disposal, but unless the conditions are perfect,like you said, they won't be used. Im not an expert, so I don't know what is necessary to access these maps, and the extent of it. It may be that with a stock setup, you can still access these maps in good conditions. but i can't say for sure because I don't know much about the ecu and the engine, etc.
All im saying is that he warned me against it, and I'm not going to purchase any engine upgrades until he can be proved wrong.
And that must be why the first run of the day by far lets you feel all the accelerative power the engine has to give...Must be that, overnight, when the car has cooled off, and its now 55 degrees out at 7:30 am when I leave the house, this lack of any present heat soak and cool outside temps allows the most 'radical' or aggressive fuel maps and ignition timing to be used...As the engine warms up and the external temps rise, depending on how hot things get as reported mainly by the IAT sensor, less aggressive fuel and timing maps get used, so you feel less of a kick in the back, as you hammer the throttle...Again, I plead, for a working and efficient intercooler....Makes each run feel like the first of the day, right?!!