The BMW G20 B48 Eventuri intake has been developed to provide the turbo with a less restrictive flow path while maintaining low inlet temperatures. Heat and volume are the main considerations when designing an intake for turbocharged engines. In the G20, the intake system is positioned next to the exhaust manifold which quickly heats up the engine bay. High temperatures are detrimental to engine performance as the turbo is expected to create boost with heated, less dense air and so the only way to ensure IATs are kept to a minimum is with a completely sealed intake. This, however, results in a restriction with only one stock air supply to draw air from.
The BMW G20 B48 Eventuri intake has been developed to provide the turbo with a less restrictive flow path while maintaining low inlet temperatures. Heat and volume are the main considerations when designing an intake for turbocharged engines. In the G20, the intake system is positioned next to the exhaust manifold which quickly heats up the engine bay. High temperatures are detrimental to engine performance as the turbo is expected to create boost with heated, less dense air and so the only way to ensure IATs are kept to a minimum is with a completely sealed intake. This, however, results in a restriction with only one stock air supply to draw air from.
Suitable for G20 318i 320i 330i 330e Also 4 Series with B48
During development we noticed an additional opening in the wheel arch area and took advantage of this by adding a secondary feed to our airbox. Additionally, our sealed airbox also has a heat shield with gold reflector to minimize radiative heat transfer from the exhaust manifold. To maximize volume, we made the airbox as large as possible with a recess for potential strut braces. The stock convoluted intake tube is replaced with a smooth carbon tube that also has a larger internal volume with an initial internal diameter of 111mm (4.4") that tapers gently downwards to match the turbo inlet. The tube provides a smooth path from the filter to the turbo inlet. Finally we use a custom high flow dry filter that is ISO tested for filtration performance and has a larger filtration area than the stock filter.
The Eventuri G20 B48 intake system is made up of a series of components designed to perform a specific purpose and manufactured to the highest standards. standard. We use 100% pre-preg carbon fiber with no fiberglass, which means we can achieve a smooth internal surface to maintain smoother airflow. Here are the details for each component and the design ethos behind them:
Each intake system consists of:
Dual-Feed Carbon Fiber Airbox
Made from pre-preg carbon fiber, the airbox has two purposes: to seal the filter from the heat of the engine bay and to provide a dual cold air supply. Since the airbox is positioned next to the exhaust manifold, it is crucial that the filter is completely sealed, so we designed the airbox to encapsulate the filter while providing a large internal volume. To seal the intake pipe we designed a laser cut plate with a rubber sealing strip that attaches to the airbox. The intake pipe passes through the plate and the rubber seal ensures that hot air does not enter the airbox. To further reduce heat absorption, there is an additional heat shield with a gold reflective layer on the exhaust manifold side that effectively combats radiant heat transfer.
Having a completely sealed airbox comes with the problem of having a restriction on the cold air supply. The stock airbox draws air from a single duct that extends into the front bumper area. During development we identified another area to draw cold air from, which was a gap between the wheel arch and the frame that the airbox sits on. To utilize this supply we extended a scoop at the rear of our design that protrudes into the wheel arch and can also be seen after installation behind the front wheel. This second feed allows the turbo to draw from a larger area, thus reducing the restriction.
Inlet tube carbon
The OEM G20 B48 airbox system was updated in cars built after November 2018 where the airflow sensor was replaced with a temperature sensor in the inlet pipe. Before this date all airbox systems had an airflow sensor and for this reason we offer 2 variants. The V1 intake which has an inlet pipe to take the MAF (airflow) sensor and the V2 intake for cars built after November 2018 which uses a temperature sensor. The difference in the tubes can be seen below.
The stock inlet pipe has a flexible section and twisted to provide movement with the engine. This however also adds the possibility of turbulence in the flow path as there are more faces that can cause vortices. We replace this with our carbon tube which is smooth and also has a larger internal volume. Unlike most aftermarket intakes we have maximized the size of our intake tube, the OEM inlet tube has an internal diameter of 80.8mm or 3.2" at the filter end. Our tube for cars built after November 2018 has an internal diameter of 109mm or 4.3". This equates to a massive 82% increase in cross-sectional area over stock. The tube tapers gently towards the stock turbo inlet to ensure the airflow remains as laminar as possible. The tube also has a CNC machined fitting for the temp sensor and vent adapter.
Custom made cone filter
Our cone filter is constructed from a double layer non-woven mesh material and is ISO tested to ensure filtration meets OEM standards. The filter is cleanable and very stable at high temperatures with the urethane base material. The filter incorporates an internal flow guide cone to help the airflow converge while reducing the possibility of a stagnation point in the center of the filter space. The filter media has significantly more surface area volume than the stock panel filter.
