Eventuri BMW G20 M340I Carbon Intake
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Product Details
The BMW G20 B58 Eventuri intake has been developed to provide the turbo with a less restrictive flow path whilst 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 located next to the exhaust manifold which rapidly heat soaks the engine bay. High temperatures are detrimental for engine performance as the turbo would have to build boost with heated, less dense air and so the only way to ensure IAT’s are kept to a minimum is for a fully sealed intake. This however, results in a restriction with only one stock air feed to draw air in from. During development, the folks at Eventuri noticed an additional opening into the wheel arch area and took advantage of this by adding a secondary feed to our airbox. Furthermore, the sealed airbox also has a heat shield with gold reflective to minimise the radiative heat transfer from the exhaust manifold. In order to maximize volume, they 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 which is also larger in internal volume with a starting internal diameter of 111mm (4.4') smoothly tapering down to match the turbo inlet. The tube provides a smooth path from the filter to the turbo inlet. Finally, they use a custom-made high-flow dry filter that is ISO tested for filtration performance and has a larger filtration area than the stock filter.
Crafted from Prepreg Carbon Fiber, the airbox serves 2 objectives - to seal the filter against engine bay heat and to provide a dual cold air feed. Since the airbox is positioned next to the exhaust manifold it is crucial for the filter to be fully sealed so they designed the airbox to encapsulate the filter and at the same time provide a large internal volume. To seal the intake tube they have designed a laser-cut plate with a rubber sealing strip that secures to the airbox. The intake tube passes through the plate and the rubber seal ensures heated air does not enter the airbox. To further minimize heat soak, there is an additional heat shield with a gold reflective layer on the exhaust manifold side which effectively combats the radiant heat transfer.
Having fully sealed airbox results in the problem of having a restriction for the cold air feed. The stock airbox draws air from a single duct that extends to the front bumper area. During development, Eventuri identified another area to draw cold air from which was a gap between the wheel arch and the chassis on which the airbox sits. To utilize this feed we extended a scoop at the back of our design which protrudes into the wheel arch and can even be seen after installation behind the front wheel. This second feed allows the turbo to draw from a larger area, therefore, reducing the restriction.
Each intake system consists of:
- Carbon Fiber Airbox with Dual Feeds
- Bespoke High Flow Dry Cone Filter
- Carbon Fiber Inlet Tube
- CNC Machined Temperature Sensor Mount
- CNC Machined Breather adapters
- Heat Shield with Gold Reflective Backing
- Laser Cut Stainless Steel Brackets
- Silicon Reducer with OEM Specification Clamps
Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.
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