My next project is to duct cool area around the bevel box as mine only makes a noise after sustained load such as motorway or repeated acceleration.
I had the same idea and fitted this NACA Duct into the floor panel to duct some air around the bevel gearbox. I didn't want to ruin the ground effect aerodynamics of the M3W by fitting a scoop..... and I had some time to waste. I have tried the non scientific check with a infrared thermometer after runs down the road with the duct open and blocked off. It maybe made a little difference but only about 5c, every little helps though. Possibly the removal of the centre panel, as newer cars have I think, would be better and easier? I cannot think it is a stressed panel, such as Lotus use on the Elise.
