So, grab your calculator and let’s crunch some numbers. Compression Ratio is the total volume of the engine divided by the clearance volume of the engine. What does that mean?

Engine Compression Calculation - Compression Connection Understanding The Ratio Steve DulcichWriterMar 01, 2004 See All 9 Photos ...

This engine has a compression ratio of 10:1. That's it! That's compression ratio.

For instance, a 5cc dome on the top of a piston willincrease compression ratio versus a flat-top piston. Likewise, largevalve pockets will decrease compression. We'll get into the calculationslater.

All this originated with our first Agent 87 engine when we combined an 8.75:1 static compression ratio with a Comp Cams Xtreme Energy camshaft. This combination looked good on the dyno and made ...

The “VC” stands for variable compression, and that means the VC-Turbo can change its compression ratio on a continuum from a pretty low 8:1 to a pretty high 14:1. Here’s why it matters so ...

Doubling a Gas Engine’s Compression Ratio Has Chaotic Results The crafty mechanics managed to get the engine to start and idle—but the party didn't last long. Ronan Glon Mar 26, 2025 10:05 AM EDT ...

The 2.0-litre VC-Turbo (short for variable compression-turbocharged), four-cylinder gas engine isn’t like a conventional combustion engine because the compression ratio can change on the fly.

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

Nissan's innovative variable-compression-ratio engine makes its debut in the Infiniti QX50. Read more about how it works and get our behind-the-wheel impressions.

Infiniti's newest engine is an engineering marvel. The VC-T engine (for "variable compression, turbocharged") can adjust its compression ratio between 8:1 and 14:1 on the fly, offering high ...