There's a fair bit of science behind how engine turbochargers do what they do (air pressure, compression, fuel burn efficiency ... port (somewhere in the dashboard), then use it to check your air/fuel ...

Mazda‘s upcoming SkyActiv-G engines will get a 14:1 compression ratio, the highest in the world for a gasoline engine, according to a report in Autoweek. Most cars run compression ratios of 8.5 ...

Compression test kits do just what they say: measure the ability of each cylinder of your engine to combust the fuel/air ...