EVENTURI – ENGINE COVER BMW G20 G29 Z4

The BMW G20 B48 Eventuri intake was developed to provide the turbo with a less restrictive flow path while maintaining low inlet temperatures. Heat and volume are the primary considerations when designing an intake for turbocharged engines. In the G20, the intake system is positioned next to the exhaust manifold, which rapidly heats the engine bay. High temperatures are detrimental to engine performance since the turbo must generate boost with heated, less dense air, so the only way to minimize IAT is with a completely sealed intake. This, however, results in a restriction with only one stock air feed to draw air from. 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 features a gold-reflective heat shield 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 reinforcements. The stock convoluted intake tube is replaced with a smooth carbon tube that also has greater internal volume with an initial internal diameter of 111mm (4.4″) that gently tapers downwards to fit 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.