Low- And High-Compression Fuel Economy Engines: The Techniques Are About The Same, But The Approach To Each Is Somewhat Different. A.Most stock cylinder heads have factory-cut undercuts of the type ...

You might have heard about high compression ratios, but what exactly are they, and what kind of effect do they have on an ...

A.Here you can see locations of sharp-edged material left from factory machining operations. Material removal should be kept to a minimum, since we are dealing with low engine rpm for which enlarged ...

Engine compression ratios have become a hot topic ...

Nissan brought the first, and only, variable-compression engine to market. But its future doesn't look bright. Complexity in cars is a funny thing. It’s tempting to say that it’s all bad, that more is ...

The FIA has updated the 2026 F1 engine rules, changing how compression ratios are measured to prevent loopholes.

http://topgear.com/content/news/stories/2122/<BR><BR>Apparently, it starts out with normal compression and spark plugs, once warmed up, this engine increases the ...