Originally Posted by
Carlos-Titx
So basically you account for mods, make sure fueling, boost, etc is at safe limits and the ecu will make the minor adjustments needed? Ie I didn't have an intercooler yet the car still made good power (although not the best) but once inlet temps get to much then the ecu will back off the boost? That kind of thing.
Or it just cracks on within those safe parameters set by what ever map?
Sort of, yes. You are right that the ECU is constantly making adjustment. You actually set various targets, and then it's up to the ECU to reach them. It has complete control, due to the fly by wire, not you. If it's happy, it will achieve those targets. If not, it won't. As an example, boost set point (which you don't map directly) is constantly altered depending on inputs. Air temp is one of them. Once temp gets above a certain point, boost will be reduced, yes. What you may be suprised is that as temperature drops, boost is also decreased. This is not a safety feature, but a feature which results in the car making the same power whether it is hot or cold outside, whether it is at sea level or on top of a mountain.
Adding an intercooler and not mapping the car will result in a slightly lower boost pressure as the cooler air means less is needed by volume to make the same power.
Rick