Aluminum Intake Plenum Porsche 991 DFI Carrera IPD  ❭  91482-3.4

Aluminum intake plenum, 74mm IPD Plenum ('20-Current).



Fits:
Porsche 992.1 Turbo / Turbo S 3.7L

The 992 Turbo engine is another modern marvel from Porsche. We were fortunate enough to have unlimited access to a 992 during our extensive development and testing program. This unrestricted time frame proved to be invaluable, allowing IPD to scrutinize every engineering and design aspect in an effort to deliver the best performing Plenum possible.

Like all previous IPD Turbo Plenums, the 992 Plenum is a product of efficiency that produces substantial HP and TQ gains through a superior and patented "Y" design that manages and delivers optimized air flow for enhanced engine performance. The Plenum has been proven to produce substantial net gains across both power bands and is guaranteed to elevate the driving experience of any Turbo.

Development started with a 1D simulation to optimize the treatment of pulse peaks in the intake tract using different pipe geometry and known engine parameters of the 992. We then graduated to optimizing 2D slices of the plenum in CFD, paying special attention to places where adverse pressure gradients that might cause separation. This allowed us to adjust curvatures on the plenum faces and build up our understanding of what was happening inside the pipe at full throttle.

After we were pleased with the 2D slices we graduated to 3D adding in all the geometry to make this a plug and play bolt-on part with optimal performance characteristics. After hundreds of geometrical and CFD iterations, we were pleased with not-only the increase in mass flow compared to the stock intake, but also the uniformity of the charge pressure and velocity across the 2 branches.

The efficiencies of the Plenum dramatically reduce initial turbo lag down low helping access the power and torque sooner, but the bulk of the power and torque gains are realized from 4000 rpm to redline, where we need and enjoy it most. The HP and TQ gains continue to increase and out-perform the factory air distributor as you climb through the revs. Peak gains of 35+ wheel HP and 35+ wheel TQ are achieved above 6000 rpm. The 992 Turbo Plenum delivers very impressive power and torque gains that will raise the performance bar of the already potent Turbo as well as raise the hairs on the back of your neck.

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92274-3.7

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Performance plenum kit. More response over the entire powerband.

Fits:
Porsche 992.1 Turbo / Carrera / Carrera 4 / Carrera S / Carrera 4S / Carrera GTS / Carrera 4 GTS  2019-2024

About the Performace Plenum:

Background: 
Upon launching the 992 generation, Porsche had abandoned the naturally aspirated engine for the Carrera models. From now on, all 911´s are turbocharged! There are a few differences in between the Carrera and the Turbo models, the displacement being the most obvious, but they also share a lot of components – the plenum is one of these! Throughout the entire development of the 992 products, we had unlimited in-house access to a 992. This way of procedure is how we always do it. It allows us to test our theories, prototypes and 3D-prints without hurdles or delays. We´d like to think that this shows on the finished product – ultimately refined without compromise. We are confident with what we have to offer the market!

Development
With the starting point in a comprehensive 3D-scan of the engine bay to get the structural limitations, we set to work. With the experience we had from previous Porsche plenums, we soon realised the need for a y-joint rather than the t-shaped OE plenum. From an airflow perspective the y-shape is more efficient as it distributes the air more evenly and with less pressure drop. We chose, as usual, to manufacture the plenum from cast aluminium as it allows for shapes that CNC-machining cannot replicate, and to us function always conquers form. Maximum airflow supersedes the bling factor!

The do88 plenum
The plenum is designed with soft, sweeping lines. Radiuses and angles have been revised and reworked many times over. The connections are CNC-machined and the plenum comes with suiting silicone hoses for optimum fitment and durability. The improvement in airflow is verified using CFD (Computer Flow Dynamics) as well as in our Superflow SF1020 flow bench. Taking away restrictions for the turbocharged air that reaches the inlet will provide better throttle response and performance gains all over the power band!

Key figures: 

• More air to your engine, less back pressure and better airflow!
• Airflow at 0,1 bar / 1,45 psi pressure drop: 846 CFM (808 CFM), 5% higher! See diagram below.
• Freeform designed, aluminium casting with CNC-machined connections.
• Y-design for optimum air distribution.
• Comes with all accessories needed for installation.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

DO88TR-300-992

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