[W126 Coupe] tornado air twister

[RONNY GEENEN]

J.Chip wrote:


Uh...a few basics. For combustion engines to produce optimum, clean power 
from an air/fuel mixture, that mixture must be at or close to an ideal 
ratio. Forcing more air into the combustion chamber (i.e., turbo or 
supercharging) than is normally drawn in by the volumetric displacement of 
the piston moving in the cylinder (normal aspiration) will only produce 
more power if the engine management system can measure the increase in air 
and provide additional fuel to maintain the proper air/fuel ratio. That 
said, for any given correct F/A ratio, a gain in the efficiency and speed 
of the burn can be made by designs that atomize the mixture better. Some 
combustion chambers are designed to "swirl" the mixture for presumably 
better atomization. Even the physical placement of the spark plug has a 
measurable effect on the efficiency of the burn. Once the burn or 
combustion explosion takes place the force pushes the piston down against 
the resistance of the mechanical inertia it is trying to overcome. Part of 
that resistance is the backpressure of exhaust gases that must be pumped 
through the exhaust manifold, and exhaust system. Properly designed headers 
and free flowing exhausts reduce the back pressure and the amount of energy 
wasted on pumping exhaust gases. This leaves more energy to do the work of 
"moving the mechanicals".


To create more power in the cylinder you add more intake air by turbo 
charging. That is correct. But you do not have to provide additional fuel, 
because not all of the fuel in a normal combustion engine will burn. The 
efficiency of a combustion engine as you also know is not very high.
At least that is the situation with 4 and 2 stroke engines on ships. I have 
been a ships engineer for more than 10 years on Dutch oil tankers.

Ronny