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

We checked the cranking cylinder pressure on several modified small-blocks >> and discovered an interesting correlation between soggy low-speed performance and low-cranking cylinder pressure.

In simple terms the high-compression cylinder, when the exhaust valve opens at BDC, is only dumping 2.5 percent of its original pressure whereas the 2:1 cylinder is dumping 26 percent!

By the time you notice a severe engine block crack, it will usually require a full replacement. Here are the signs and ...

Some engines use a spark to ignite their fuel, and others rely on compression. What does all of that mean? And how do the two ...

Infiniti has unveiled a first-ever variable compression ratio, for a four-cylinder engine that will go into production for 2018.

Chevrolet's big block family of engines has some famous powerplants, but there's a lot of history to miss if you only pay attention to the 396 and 454.

This reduces compression in the cylinders and you don't get as big a bang for your buck, so your vehicle loses power. Piston rings can be replaced, but it's an expensive job.

The new Infiniti VC-Turbo engine (code-named KR20) is chock-full of interesting details that come with its variable-compression-ratio trick.

There are lots of options when it comes to Chevy small-block crate engines. Here are seven of the most powerful crate engines that you can buy.