Curious if anyone has thought of this, and tried it.. Heat goes up. Pushing heat down makes everything work harder. Why not let the heat do it's thing? reverse the flow and run the exhaust up. Where ? Not sure yet, but I might look into building some headers, pipes and safe routing. Thoughts if any ?
Heat radiates; heated air rises, known as convection. When radiant heat encounters an object its absorbed and then conducts, unless the object is transparent, in which case the radiant heat is transmitted.
Lateformula is right, a properly designed exhaust scavenges......
Heat radiates; heated air rises, known as convection. When radiant heat encounters an object its absorbed and then conducts, unless the object is transparent, in which case the radiant heat is transmitted.
Lateformula is right, a properly designed exhaust scavenges......
Heat is just energy. It doesn't really do much of anything by itself. Molecules transfer the heat energy, whether they be air molecules, or the molecules that make up whatever metal is used for the various parts of your engine and exhaust.
As air molecules heat up, they push away from each other. Since the air molecules are pushing apart, cooler air moves in to fill the gaps. In an open environment, such as outside, or in a room in your house, there is enough air volume that this results in the warm air going up, and the cold air going down.
In a more closed system, with lower air volume, it's not simply air that is being expelled through the exhaust. It's also being pushed out through the exhaust valve. A vacuum pump operates a little differently than pure convection. Air and fuel are sucked into the engine, then they are compressed and burned, and then the mass of burned (and some unburned) fuel and air are pushed out through the exhaust valve. The design of the exhaust system, and the timing of the camshaft also affect the exhaust gas being expelled. Then in the catalytic converter, unburned fuel is pushed through a catalyst and burned up as well. There can also be water vapor that forms in the exhaust, as hydrogen and oxygen are part of the exhaust gases. The heat though, is just there. And as the molecules in the exhaust gas push away from each other, they don't have much of anywhere to go, which causes pressure to build in the exhaust. As the pressure builds, and is constantly being added to by the pressure of exhaust gas coming out of the engine, it quickly overcomes the pressure of the ambient air, and flows down the pipe, pushing the ambient air back out along with the exhaust gas. Once it exits, then the convection happens where colder, more dense air, fills the voids as the molecules in the exhaust can push away from each other, and the heated air is pushed upward as the colder air falls down, along with the denser parts of the exhaust, such as the drops of water that will form as the vapor condenses when exiting the exhaust.
Well, for 2 reasons at first.. less heat in the engine and trunk compartment, and I have always heard that a cooler engine will get better mileage. Now after seeing what pictured, I want it more.. and not the stacks out the hood of that truck/car/thing..
