Hey guys I’m new to owning a raptor and this forum. Sorry in advance if there’s a thread for this question but do I need an accessport or something similar to do an intake and exhaust. If it’s anything like my old Subaru then yeah I need that accessport to do any kind of mod. Any info is much appreciated. Thanks again guys. John
The way that your Raptor measures the volume of air entering the engine is different from how a Subaru will measure air volume. Subarus use a mass air flow sensor (MAF) that sits in the intake tract before the turbo, and uses the sensor data to let the ECU know how much air is entering the engine so that it can inject the appropriate amount of fuel. If you change the diameter of the tubing where the MAF sits or change the characteristics of airflow across the sensor on a MAF car, you will NEED to retune the ECU to rescale the MAF table to avoid excessive fuel trims. This is a huge factor for engine safety on a MAF car.
The Raptor does not use a MAF sensor, and instead relies on a speed density system to measure the volume of air entering the engine. Speed density systems are practically unaffected by installing different conventional cold air intakes and do not require any retuning for fuel trims or engine safety. However, if the intake system significantly changes pre-turbo restriction, you may get some issues with the boost control system overshooting targets. Luckily on the Raptor, the boost control system is advanced enough that this isn't too much of a problem. We advertise our intake as requiring a tune due to a potential DTC that can be thrown by the very finicky PCV system - while the vast majority of vehicles will not experience an issue with the PCV code even when running a stock tune, we want to set expectations that it may be necessary to install an Accessport to avoid this issue.
Exhaust modifications can require retuning depending on what parts you swap out, just like on a Subaru. Cat-back or muffler changes will not require any tuning changes, but downpipe changes generally will for best results.
Let us know if you have any other questions!
-Sam@COBB
