By definition, the compression ratio (CR) ... First, bring the piston to TDC, then zero the dial indicator on the deck surface of the cylinder block.

This is a low cranking compression, especially when you compare it to engines like the ZZ4 350ci/345hp crate engine that makes around 190 psi or the current HT 383 with 9.1:1 compression and a big ...

In simple terms the high-compression cylinder, when the exhaust valve opens at BDC, ... For instance, a mildly modified 9:1 350 small-block Chevy would make about 380 lb-ft of torque.

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 ...

Fixed-compression-ratio 2.0-liter turbocharged four-cylinder engines, which have become the go-to powerplants across wide swaths of today’s automotive landscape, generally have a compression ...

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