Originally Posted by NeverEnough
From your description, I take it you noticed a good power increase, even without an ECU upgrade? I was under the impression that you needed an ECU upgrade in order to do the Pulley upgrade. As sophisticated as the Car is, I'm surprised it would "let" it work properly with just a pulley upgrade. I would assume that the MAP sensor would see the extra boost and pull back on everything. Am I wrong?
The power increase is noticeable with the Pulley upgrade and the ECU upgrade is not necessary. While the ECU is not required you will see healthy gains from the addition of ECU programming. I am trying to finalize additional mods to the car that will require a custom tuned ECU so I am holding off till everything is lined up and in place. I am hoping to have everything finalizes in the next couple of months. It is a slow process as there are very few out of the box solutions.
The ECU is very sophisticated and it handles the added boost without issue. The ECU is not concerned with the level of boost. It is concerned to measure Intake Air Temp, ping/knock, etc. From an engineering perspective I can not think of a reason to limit the boost. The sensors are in place to protect the engine. The engine can support all the boost that the SC can generate - you will "redline" the SC prior to generating too much boost for the engine.
Additionally you have to take into account things like air density and how it would appear to the ECU. For example I could be 9,000 ft above sea level in 100 degree weather one day. Then the next day maybe I am 100 ft below sea level and it is 37 degrees outside. Want to talk about a huge difference in power the car will put down at the wheels. You will go from a situation where you will have trouble spinning the tires off the line to a situation where you spin at the 1-2 upshift.