I hate to start sounding like the “Old Soldier” but… 50 years ago I read a feature that fascinated me at the time. It was all about intake trumpets and how the overall intake length altered the power output of the engine. Try as I might I could not get my 15 year old head around how it worked. Now I am not suggesting that I have been pondering that feature for the last 50 years, (it hasn’t kept me awake at nights), but I can still remember how the text explained that a parallel intake trumpet worked better than a tapered one. Theory today suggests that this might actually be the case...
