Eventuri carbon intake for Toyota Supra MK5 B48 engine

Description

The Supra MK5 Eventuri intake was developed to provide the turbo with a less restrictive flow path whilst maintaining low intake temperatures. Heat and volume are the primary considerations when designing an intake for turbocharged engines. In the Supra the intake system is located next to the exhaust manifold which quickly heats up the engine bay. High temperatures are detrimental to engine performance as the turbo would have to create boost with heated, less dense air and so the only way to ensure IATs are minimised is to have a fully sealed intake. However, this does result in restriction with only a stock air supply to draw air in. During development we noticed an additional opening in the wheel arch area and took advantage of this by adding a secondary supply to our airbox. In addition, our sealed airbox also features a gold-tinted heat shield to minimise radiative heat transfer from the exhaust manifold. In order to maximize volume, we made the airbox as large as possible with a recess for possible strut spacers. The stock convoluted intake tube is replaced with a smooth carbon tube that is also larger in internal volume with a starting internal diameter of 111mm (4,4″) tapering gradually to match the turbo inlet. The tube provides a smooth path from the filter to the turbo inlet. Finally, we 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.