Originally Posted by TiAg335i
This is kind of disappointing. If we want to run Stage 2 we MUST have an upgraded FMIC and oil cooler? Assuming we don't have those two things, this tune is only good for Stage 1?
Don't think of it as a limitation of the ECU but rather a limitation of the mechanical configuration of the engine. The engine can only handle so much airflow with the parts it has. So if you overrunn the intercooler, you can only run so much boost before you are just heating the intake air. Same thing for the turbocharger, it will only make so much power before it exceeds it's efficiency and you either have to pull back or increase the size of the turbo.
So while the turboback gives you the ability to make more power, the stock intercooler is a choke point, so it must also must be upgraded to support the increase in airflow and boost. Please let us know if you have any more questions or concerns!