986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

MNBoxster · 01-07-2007, 08:15 PM

Hi,

djomlas, your reasoning isn't backed up by anything except supposition. There is no known benefit to removing this piece, not even an improvement in sound, in fact, I suspect the opposite will be true.

Thermodynamics/aerodynamics is pretty complex science. I'm sure a lot of thought went into maximizing the airflow, with this piece attached, into the Throttle Body by the Porsche engineers.

And if heat management is your thing, the thermodynamic and insulating qualities of the ABS used in the Silencer is much better than placing a raw aluminum tube in the engine bay, you'll pick up maybe 10 times more heat doing that. And, realize that the air doen't so much flow through this piece as much as it flows past it, so it's not contributing significantly to any charge heat anyway, if at all.

Swapping this part, or removing that one, is sort of willy-nilly engineering at best. But, it's your car and so if you want to, go ahead, it's not irreversible. Just be sure you cap it off air tight, because it's post MAF sensor and you'll get bad AF/Timing Maps if you don't, possibly even some codes. Maybe not immediately, but possibly in time if a leak develops.

Also realize, when doing these sort of mods, you complicate the diagnostics tremendously if something ever does go wrong, because the standard tests/diagnostics will not fully apply anymore.

Just don't count on seeing any real, measurable, vs Placebic, benefit. In any event, it certainly won't amount to much, not like the 2nd Coming of the 4-stroke engine or anything, probably not worth the effort in the end...

Happy Motoring!... Jim'99

01-07-2007, 08:15 PM	#10
MNBoxster Registered User Join Date: Sep 2005 Location: Minneapolis/St. Paul, Minnesota, USA Posts: 3,308	Hi, djomlas, your reasoning isn't backed up by anything except supposition. There is no known benefit to removing this piece, not even an improvement in sound, in fact, I suspect the opposite will be true. Thermodynamics/aerodynamics is pretty complex science. I'm sure a lot of thought went into maximizing the airflow, with this piece attached, into the Throttle Body by the Porsche engineers. And if heat management is your thing, the thermodynamic and insulating qualities of the ABS used in the Silencer is much better than placing a raw aluminum tube in the engine bay, you'll pick up maybe 10 times more heat doing that. And, realize that the air doen't so much flow through this piece as much as it flows past it, so it's not contributing significantly to any charge heat anyway, if at all. Swapping this part, or removing that one, is sort of willy-nilly engineering at best. But, it's your car and so if you want to, go ahead, it's not irreversible. Just be sure you cap it off air tight, because it's post MAF sensor and you'll get bad AF/Timing Maps if you don't, possibly even some codes. Maybe not immediately, but possibly in time if a leak develops. Also realize, when doing these sort of mods, you complicate the diagnostics tremendously if something ever does go wrong, because the standard tests/diagnostics will not fully apply anymore. Just don't count on seeing any real, measurable, vs Placebic, benefit. In any event, it certainly won't amount to much, not like the 2nd Coming of the 4-stroke engine or anything, probably not worth the effort in the end... Happy Motoring!... Jim'99 Last edited by MNBoxster; 01-07-2007 at 08:26 PM.