Eventuri Carbon intake system for Porsche 991.1 and 991.2

Tailor-made carbon intake system / intake solution, for real power and torque increase for Porsche 991.1 and 991.2 Turbo, Turbo S by Eventuri

Acceleration time: 100-200 km/h Reduced by 0.2 seconds

Fitment: Porsche 991.1 991.2 Turbo, Turbo S

The 991 Turbo Eventuri intake system was developed through extensive field testing with the aim of making the turbos work more efficiently. By replacing the single stock airbox with individual, patented Eventuri filter housings, the turbos are able to spool and generate boost with less resistance. This shortens the wastegate duty cycles, resulting in peak rise at lower rpm and therefore increased performance. The two individual filters offer a larger filter area than the one-piece panel filter. To keep intake air temperatures low, the Eventuri housings are also sealed against an air duct that draws ambient air from the same location as the OEM system. Since the 911 Turbo engine bay is tightly packed, high intake temperatures can only be avoided by a fully sealed intake system. The combination of smoother airflow to each turbo with low intake temperatures results in higher performance and more direct response via the stock airbox.

The Eventuri Difference

The 911 Turbo Eventuri system uses our patented carbon fiber housings with our bespoke Gen 2 filters that allow for aerodynamically efficient airflow from the filter to the turbos. Not just another cone filter with a heat shield, but a unique design that induces the Venturi effect and maintains laminar flow conditions to reduce drag on the turbos.

The intake was road tested using a Vbox unit to record acceleration from 60-130mph. Testing was carried out on the same track - again on the same day to keep variables to a minimum. Results show that acceleration times from 60-130mph have reduced by 0.2 seconds, a significant improvement at such speeds.

Summary of acceleration results:

• 60-130mph with stick mount = 8.04 seconds
• 60-130mph with Eventuri mount = 7.83 seconds

The gains are due to a combination of reasons:

The Eventuri 991 Turbo intake system consists of a number of components designed for a specific purpose and manufactured to the highest standards. Here are the details of each component and the design behind it:

Each intake system consists of:

• 2 x carbon Eventuri housings with integrated tubes
• 2 x Custom-made High Flow Generation 2 Filters
• 2 x aluminum intake manifold
• carbon fiber intake duct
• Laser-cut stainless steel brackets

The filter housings are made from our bespoke Gen 2 filters, aluminium intake manifolds, carbon bodies and integrated pipes. The carbon bodies enclose the rear mounted filters and gently shape the airflow up to the stock turbo inlet pipes. By separating the intake path and using a specific filter for each turbocharger, the intake allows the turbos to function more efficiently. Crucially, the Eventuri housings extend organically with a gentle curve from the filter opening to the stock turbo hose. This ensures that the airflow remains as smooth as possible throughout the system. A smooth airflow results in less drag and thus the turbos can reach peak boost earlier in the rev range. It also means that the throttle response feels more direct.

PATENTED TECHNOLOGY

Our patented filter housings gently reduce the cross-sectional area as they enclose the filters and taper towards the hose. This geometry induces the venturi effect where the airflow is accelerated while maintaining laminar conditions. It can be thought of as one large velocity stack - below is a diagram showing the comparison between our patented design and a regular intake system. Our custom filters assist the airflow through the housings and allow for a consistent velocity profile as the airflow exits the housings.

The intake duct seals with the OEM rubber pad on the bottom of the trunk lid and then extends downwards to seal against the filter housings. The 100% prepreg carbon intake duct ensures that the intake duct only draws in ambient air and not heated engine bay air. To maximize flow efficiency, the transition from the circular openings for the filter housings to the single air entry point is as smooth as possible. The duct also features 2 drain hoses that direct water away from the filters. The pipes are designed so that the intake ports draw in a minimum amount of air from the engine bay due to the greater flow resistance in the pipes compared to the opening at the top of the duct. The complex geometry of the duct was necessary to work around the various components in the 991 Tu's engine bay.

The brackets are laser cut from stainless steel and powder coated. We have gone to great lengths to ensure that the Eventuri intake system for the Porsche 991 attaches to the stock mounting points. The brackets not only attach the intakes to the body, but also allow engine components to be secured in the same way as the stock airbox. To save weight, each bracket features deliberately shaped cutouts that remove material but keep the overall structure rigid.