The compression ratio isn’t just a number: it’s one of the greatest determining factors in engine building. Compression ratio determines the type of fuel, how much boost, and has a significant ...

This engine has an 8.84:1 compression ratio. When using this formula, make sure to express domed piston cc's as a negative number.

When overboring an engine, the percentage of gain in compression ratio decreases as you add clearance volume and increases as you remove clearance volume, as we'll describe next.

The MCE-5 engine from MCE-5 Development in Lyon, France varies its compression ratio and uses a combined gear and rod-crank mechanism.

Increasing an engine’s compression ratio is a proven way of unlocking extra horsepower, but there’s a point of diminishing returns. The team at Garage 54, the Russian mechanics who built a V16 ...

Variable Compression Ratio Engines have been some sort of a Holy Grail, and now Porsche proposes a viable solution for this ...

That's because Infiniti is planning to roll out the variable compression ratio engine for its next generation of cars.

Why variable compression ratio matters Today's gasoline-engine cars compress the outside air to about a tenth its original volume, a 10:1 ratio, inside each cylinder.

In principal, the engine changes compression ratio simply by altering where the cylinder's top dead center is.

Infiniti will showcase its new variable compression ratio engines – the world’s first in series production, it claims – at the 2016 Paris motor show. Badged VC-T (Variable Compression ...

How to Calculate Compression Ratio from Scratch As an example, let's calculate the CR for a popular big-block Chevy application.