Cooling the air intake on a V8

The idea of lagging the exhaust to keep the gas temperature up is laughable.

Check out BOYLES Law and CHARLES's Law which set out the relationships between PRESSURE, and VOLUME and TEMPERATURE of gases. These are iniversal laws of physics.

I won't try to explain it BUT, believe me when I say that the COLDER you can get the gases to become the less VOLUME AND PRESSURE there will be - in other words LESS exhaust to get rid of.

There is considerable nonsense up above here, and some factual errors of science.

CharlesY

CharlesY said:

Check out BOYLES Law and CHARLES's Law which set out the relationships between PRESSURE, and VOLUME and TEMPERATURE of gases. These are iniversal laws of physics.

Click to expand...

I knew I should have paid attention at school. :doh:
The only law I remember is Murphy's law "Anything that can go wrong will go wrong" especially as I own a Land Rover.

Shifty1962 said:

I knew I should have paid attention at school. :doh:
The only law I remember is Murphy's law "Anything that can go wrong will go wrong" especially as I own a Land Rover.

Click to expand...

Basically what happens is this ....

The gases in the cylinder are VERY hot, and at VERY high Pressure all in a very small VOLUME.

Then the exhaust valve opens - the gases rush out more or less into an empty space called the exhaust manifold and pipe.

THE PRESSURE AND TEMPERATURE drops dramatically but the VOLUME of the now cooler gas has increased - it expanded. The lower the pressure goes (i.e. free-flow exhaust) the COLDER the gases will be and even though the gases have expanded the fact is the COOLER the gas is the less volume of it there is too. The gas picks up VELOCITY too, and creating that form of energy also helps to reduce pressure and temperature.

Moral .... get the exhaust out as freely as possible without being noisy about it.

CharlesY