Engine CompressionAtmospheric pressure at sea level is approximately 14.7 psi.A 9:1 compression ratio cylinder is compressing the air and fuel mixture to about 132 psi at sea level (9x14.7=132.3 ...

This is known as homogeneous charge compression ignition, or HCCI, an idea that Kyle Niemeyer covered in depth for us back in 2012. HCCI has some other advantages, too. On top of burning cooler ...

Back To Basics: Compression And Cylinder Leakage Test. Originally published in the May 1980 issue of Hot Rod magazine. HOT ROD Staff Writer Jan 01, 2023. See All 3 Photos. By C.J. Baker.

There are a couple of ways to look at just why octane matters to you. For those of you lucky enough to have an old muscle car from the 60s and 70s, who have a built-up, higher compression motor ...

Healthy engines should have compression over 100 psi per cylinder, with no more than 10 percent variation between the highest and lowest readings. With a compression tester, a few hand tools, and ...

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 ...

Forget variable length intakes and variable valve timing, Infiniti is going all the way and introducing variable cylinder compression ratios. The new VC-T turbo engine automatically adjusts ...

2022 Nissan Rogue Gets Three-Cylinder, Variable-Compression Turbo Engine. It promises to deliver 201 horsepower and 33 mpg combined. By Peter Holderith. Published Nov 17, 2021 10:18 AM EST.