The great Warren Johnson said at one time: "If the results do not fit the theory, create a new theory".
While there is a lot of theory being discussed here, the best decision making tool is the end result after a mod is done. Many of the top engine builders have discoverd that big intakes and big exhaust tubes have their own specific use and apllication. The are engine application that like big plenums, others don't. The same goes with exhaust systems; with advent of step headers and Tri-Y headers, the philosophy of running big headers has gone away. When physically possible, the trend is to run smaller tube headers with longer primaries, or if physically you need a shorter header because exhaust constraints, run stepped headers or Tri-Y'*. With intakes, the volumes has been reduced in the plenum to increase velocity, and this also includes the cross-section of the runner. That is why the new generation of flow benches that can measure the energy and pulse are so useful to making power. The flow bench I use in addition to being able to record the pulse vie the pitot tube, I also use food coloring to see the path along the port wall.
If you want to gain the most form your engine, use an efficient cold air intake system and a good flowing exhaust. The effect of the screen is negligible comapred to other items. I consider the screen a safety item for both the engine and SC. There is probably more to be gained by taking the TB off and giving it a good cleaning. I have removed many TB'* and the accumulation of soot will reduce its performance when compared to the screen. Also, always remove the TB for cleaning; spraying cleaner through the TB will create havoc on the SC and also on palstic intakes. Also, I suspect that cleaners could also be the cause to failed intake gasket and leaks. With time, due to thermal cycling, the gaskets will harden. The applications of spray solvent will deteriorate the gasket more and many of these gaskets have a silicone bead that may be harmed. In addition, the intake threads on many cars, have sealant from the factory. The solvent will also dilute the sealer and the bolts will eventually get loose. Just a thougth and consideration.