HP vs Torque

The guy in the video seems like a kid fresh out of mechanical engineering school regurgitating his book learning. :) Kinda like I would have been at that age. He actually has a decent video on why engines don't need exhaust back pressure.

wilber1 wrote:
Overhead cams go back before WW1. A 1912 Peugeot race car which won the French Grand Prix was the first DOHC engine. Several WW1 aircraft engines used overhead cams.

I believe it was actually Fiat that developed the first DOHC engine in 1912 followed by Peugot in 1913 and Alfa in 1914. I think it was Fiat that was also the first or one of the first to use belt driven overhead cams.