This is the 1st article of our new “Boost Control Tips & Tricks” Newsletter that we will be sending out few times per year and which will cover insider tips and advice for making the most out of your turbocharger vehicle.
1. Too shallow external wastegate installation angle
Ideally, the wastegate angle should converge with the gas flow and be placed at a point where it can evacuate gases from all cylinders. If the angle is too shallow the dynamic range of the wastegate will be limited and boost will have a tendency to raise at higher rpm.
2. Poorly chosen external wastegate size
Contrary to popular belief the size of the wastegate valve should not be proportional to the target engine horsepower. In reality a smaller turbocharger might require a larger wastegate
in order to be able to bypass enough exhaust flow to control boost.
3. Wrong internal wastegate installation angle
Many times to fit the turbocharger on the engine, rotation of the housings is required. This can lead to wrong wastegate actuator rod angles causing sticking and inconsistent boost control