Originally Posted by oldbogie
Inside a manifold there is a lot of mayhem and amazing amount for such a short distance but this is why port fuel injection is so superior in making power than a carb or TBI as this mayhem is eliminated. The finely vaporized fuel the carb or TBI puts into the airstream quickly comes out of suspension with the air and becomes streams of liquid running along the outside of every turn the mixture has to make. This stream if not remixed does not burn, it just gets pumped around the rings to enter the crankcase and gets tossed out the exhaust valve. That's lost power and lost money. The answer to this was to just richen the mixture till a good burnable mixture can be achieved to run on and just let the excess go as I describe.
Can't agree with this and neither CarCraft Magazine through their dyno testing.
Carbs continue to make more power than port injection. This is because the fuel is introduced further upstream. The fuel then pulls the heat out of the air as it vaporizes in the manifold and this results in a cooler, denser mixture and more power.