- Moderator
- #21
The engine calculations rely on ebp (exhaust backpressure) to apply the correct amount of boost. An aftermarket exhaust will change the backpressure. "But the ebp sensor is pre turbo!" ,yes, but the way I explain that is what will happen to a constipated man in a pie eating contest? Eventually, he wont be going too fast. Backpressure, post turbo, DOES affect the ebp sensor. A cai affects it because the air is measured going in,(MAF, MAP) and measured going out (EBP). Only a certain amount of air can get in, changing the filter only allows more dirt in (with the same amount of air). The last 6.0 that was denied warranty at our shop by our FSE, was denied because of the CAI, not his controller.