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Porsche Cayman GT4 IPD Plenum from GMP Performance
The Cayman GT4 is a popular visitor here at GMP Performance and because of that, we are always on the hunt for ways to boost performance while still letting the engine shine with its natural excellence. IPD Plenums are a perfect fit to do just that, providing power gains by focusing on reducing restrictions and letting the GT4 breathe.
From IPD:
"Porsche has once again left the door open for some additional engine performance improvements with the new GT4 by continuing to utilize the same factory intake found on the 981 S and GTS models. These intake systems employ the smaller, more restrictive 74mm throttle body which limits power and torque potential.
Porsche claims the 991 Carrera S delivers 420 HP and the GT4 delivers 385 HP but if they are the same engine why does the GT4 produce a whopping 35 less HP? This means the GT4 engine is only 15 HP stronger than the 991 Carrera Non-S 3.4L engine. Of course, these are only advertised figures and as we all know, “tuning” plays a crucial role in engine output. The bottom line is that Carrera S engine benefits from the IPD Plenum without a larger TB, so the GT4 should perform even better with the Plenum and more appropriately sized 82mm TB."
The IPD Plenum dramatically improves power and torque gains throughout the entire RPM band while delivering a smoother and more linear power curve. This GT4 dyno test session shows net gains from launch to redline with the greatest gains (18 WHP / 17 Torque) being realized at 5200 and 6900 RPM.
The IPD customers who have installed and driven the GT4 with the 82mm Competition IPD Plenum have all collectively been impressed with the performance gains and given positive feedback. The IPD Plenum delivers net gains throughout both power and torque curves helping it compete with its bigger and more famous brother, the GT3.
Superior and more efficient design over the factory intake.
The IPD Plenums are products of efficiency that simply improve intake air flow and increase air velocity. The “Y” shape design and dimpled interior surface make air flow more laminar (less turbulent) dramatically improving power and torque across the entire RPM band. Smoother more optimized intake air flow will improve the performance of any engines. The more efficiently an engine breaths, the more efficiently it produces power.
Deliver impressive power gains regardless of modifications.
The superior design of the IPD Plenums optimizes flow while increasing air velocity. Period! This applies to any Porsche engine, producing any level of power. The patented “Y” design delivers impressive performance gains for both bone-stock and highly modified Porsches. The more efficient design of the IPD Plenum will always outperform the factory air distributor. The factory intake will become even more detrimental to performance as your increase the power and torque outputs. The bigger the power, the better the IPD Plenum performs.
Produce substantial gains for both turbo and NA applications.
The Plenums always deliver considerable gains on both turbo AND naturally aspirated engines. It’s a fact that the Turbo Plenums do produce more power than the NA Plenums. But the Turbo engines also produce more power. The fact is that the percentage gains of the different Plenum applications are actually almost identical, around 8-10% depending on the specific model.
Do not require an ECU flash and will not cause a CEL.
IPD Plenums should never cause a CEL or require an ECU Flash. If a Plenum is installed correctly there should be no fault codes or running issues, only solid performance gains across the entire RPM band. The only issue that could possibly arise is the need for a new MAF sensor if you already have a degraded sensor or perform a TB adaptation. There is absolutely no need to re-flash your ECU after installing an IPD Plenum, Period! Although any reputable Porsche tuner could further optimize an ECU program to achieve even greater performance gains with the Plenum installed.
Aluminum Plenums run cooler and don’t suffer from heat soak.
The Aluminum Plenums do NOT experience heat soak under driving or racing conditions. It is true that aluminum has a higher thermal conductivity than plastic. In fact, aluminum is 650 times more thermally conductive than plastic and has a specific heat capacity that is 550 times higher than plastic. This means the aluminum Plenum actually spreads the energy it’s exposed to 656 times faster than the plastic and can store more than 550 times the amount of energy per unit mass. Bottom line, aluminum can absorb more heat than plastic, but it also takes considerably more energy to heat up and it's losing that energy way faster than the aluminum allowing the IPD Plenum to remain cooler from outside ambient air under driving conditions, ultimately improving engine performance over plastic. Plus, why would Porsche utilize aluminum intakes on GT3’s, GT2’s, Cup Cars and Cup R’s?
IPD Plenums continue to be the best performance bolt-on modification for Porsches on the market today, especially when considering the dollar per horsepower return. Each and every IPD Plenum delivers the performance gains claimed by IPD and is backed by their 100% money-back satisfaction guarantee.
As longtime dealers for IPD, we have installed more than a few of these for our Porsche clientele and we cannot recommend them enough. For more on this part, click here or message us with any questions!
