996 intake systems,, worth it?
03-29-2010, 07:18 AM
#2
What would be worth it and more power would be individual intakes with secondary injectors. That would be a good start for approaching getting 180hp per liter. Some nice flatside carbs would really make the car rip up the road. Instant throttle kick in the tail.
03-29-2010, 07:55 AM
#3
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No real HP gains. If it was that easy and cheap, Porsche would have already done it. It just sounds louder so you ears tell your "butt dyno" that the car is faster! 
03-29-2010, 08:30 AM
#4
I recently installed the EVOMS intake and took measurements of airflow before and after the installation. Starting at 4k rpm you pick up about 5% airflow and move the volumetric efficiency of the engine from 90-95% to 95-100%. Assuming the ECU provides the fuel you should make more power.
03-29-2010, 09:32 AM
#6
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Sound can be a percieved improvement equating to a gain in HP, but many might question and significant gains in power. However, it is a popular mod for many nonetheless.
03-29-2010, 11:12 AM
#7
No car manufacturer designs an engine with a single minded focus on power. There is always a list of engineering criteria, and often they conflict with one another. In the case of cold air induction, Porsche is bound by German noise laws, which are strict (these same rules also apply to exhausts, which is why the PSE was born). Companies like EVOMS don't have to comply with those regulations. It's therefore impossible to say with certainty that an aftermarket CAI is no better than the OE version, unless you have data... because we don't know what a CAI would look like if Porsche designed it for power alone.
Also, a CAIs are about more than volume of air. A CAI has to manage volume, temperature, turbulence and the pressure of the charge (relative to manifold pressure or something like that...). People grossly oversimplify these things. I'm not saying aftermarket pieces are better or worse or that one is better than another; I'm just saying that "nice noise but no power" as a generalization is misinformation.
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03-29-2010, 11:59 AM
#15