When I was a teenager in the norwegian coast I had a small speedboat with a 20 hp outboard. I remember I noticed that the boat was slightly faster in the cool evenings and nights, and even more so when I took the lid off the outboard while running. I had friends with similar boats, we were racing each other so it was easy to detect the increase in speed. So I do believe in delivering cold, dense air to the engine - and for reasons well explained here I do not have so much faith in the inverted louvre/trumpet system. I would like to try the "above the rad" approach, but the available space seems restricted. To those of you who has tried this, have you made some sort of scoop or have you just squeezed a tube in?
Robbie the Norseman 2004 V6 Roadster Sherwood green
