The best performance modification that I have made to my Boxster-S to date!

[Lobo1186]

thats interesting I always looked at an engine like a breathing person. The more Air you can get the better. (IE for runners the better their body can get the air to the blood stream etc the better) I didnt know there was more to it than just volume available to the engine.

[JFP in PA]

First, let me be direct about this plenum: I have no personal experience with it. The concept of creating a smoother flow path often has merit; but not always. That said, before I would even remotely consider popping nearly a grand for it, I would need to see some unbiased performance data.

Intake or cylinder head “improvements” are typically developed on a flow bench, which reproduces the flow under vacuum conditions that occur in an engine. A flow bench can accurately reproduce and quantify the slightest increase in flow. These are the devices used to develop the concept of canting the intake valves slightly (literally a couple of degrees off axis) on race engines to improve cylinder filling and flow. Flow benches can be used to detect the changes brought on by just altering the finish on and an intake’s interior; they are that sensitive.



Once optimized on a flow bench, the plenum should be subjected to extensive dyno pulls. Anyone that has been seriously involved in the development of racing components will tell you that improving flow does not always translate into more usable power; in fact, sometimes really high flowing intakes do not make more power, or at least not in a usable RPM range. And sometimes what seemed like a good idea actually makes things worse……….

Once the developer has “paid their dues” and come up with a proven concept, the next step would be to get some units into the hands of what marketer’s call “early adopters”, those that are willing to take a chance on a new technology, but are independent of the product’s developer(s) and have some level of credibility in the community. These early adopters then beat the Hell out of the component to either prove or disprove its relative merit.

So far, all I have seen for this component are shaky and undocumented tests done by anonymous individuals of unknown relationship to the developer posted on the net. That really does not “cut the mustard” on proving the component does anything positive………………..

[Johnny Danger]

This was a plenum that was manufactured in Spain. It was called the "Techno Toro". Unfortunately, early dyno testing proved it to be very restrictive.

[Boxtaboy]

Originally Posted by Johnny Danger

This was a plenum that was manufactured in Spain. It was called the "Techno Toro". Unfortunately, early dyno testing proved it to be very restrictive.

Is the horn being pushed or sucked thru for maximum airflow?

[kias@tampabay.rr.com]

It is made in the USA (California) and has a patent pending on it with stamp "Made in USA" on the die cast. The diameter of this plenum is 0.5" larger than stock plenum on each side. Go to utube and there are several dynos on the Porsches with this pelnum. You can even see how big this plenum is compare to stock. Pedro's Torque2 has identical design inside except with plastic glued to the stock pelnum. There is even patent pending on the design submitted by the IPD which is U.S. company.

[blinkwatt]

I thought Pedro's was glued and screwed?

Wouldn't it only make sense to increase the diameter of the plenum if the intakes,throttle body and air filter system were increased as well?

[gschotland]

Originally Posted by kias@tampabay.rr.com

Pedro's Torque2 has identical design inside except with plastic glued to the stock pelnum.

For 4x the bucks does the IPD deliver 4x the performance of Pedro's?

On this test of a Cayman S published in European Car, they measured:

Baseline
Peak wheel-horsepower: 260 @ 6200 rpm
Peak wheel torque: 223 lb-ft @ 4400 rpm

Maximum power gain: 13 whp @ 5900 rpm
Maximum torque gain: 13 lb-ft @ 5900 rpm

http://www.europeancarweb.com/features/epcp_0808_porsche_cayman_s_proven_power_adders/index.html

Can one feel this ~5% peak gain "seat of the pants"? Very likely. Is this going to produce dramatic real world performance improvements for a street car to justify the cost? Doubtful, but let's see some objective tests.

[blinkwatt]

Originally Posted by gschotland

On this test of a Cayman S published in European Car, they measured:

Baseline
Peak wheel-horsepower: 260 @ 6200 rpm
Peak wheel torque: 223 lb-ft @ 4400 rpm

Maximum power gain: 13 whp @ 5900 rpm
Maximum torque gain: 13 lb-ft @ 5900 rpm

http://www.europeancarweb.com/features/epcp_0808_porsche_cayman_s_proven_power_adders/index.html

Those graphs look like they were made in Excel,not on a Dynojet or Mustang dyno.

Why does it vary so much from what they claim?!
http://www.6speedonline.com/forums/boxster-cayman/83635-new-ipd-cayman-s-plenum-rss.html

They also don't list the variables;gas,,if the car's ECU was reset,other mods and such.(on the 6speedonline)

[Johnny Danger]

Originally Posted by Boxtaboy

Is the horn being pushed or sucked thru for maximum airflow?

I believe the term "ram induction" was used.

[sd_boxster]

Close. This is actually an example of AA - "abnormal aspiration"

Originally Posted by Johnny Danger

I believe the term "ram induction" was used.