i mentioned it a while back, back when i still had my TMIC i made a plate with sheet metal and zip ties that fit under the intercooler over the Y pipe and ducted air coming down from the intercooler out towards the back of the engine bay it fed back and attached via zip ties to the trans mount. it did a pretty good job of keeping hot air from coming up out of the scoop when stopped and keeping cool air moving across the intercooler

sadly i didn't not take measurements or any empirical data to support my claim that things ran better and the intercooler was colder, before i could melt snow around the hood scoop idleing the car, afterwards snow wouldn't melt at all (yes i scraped it out of the way before leaving). you could also feel the difference with your hand after running the car a bit and parking it

just an idea...