Explain Quench to me.....GO!

Some other food for thought...

Quench along with smaller combustion chambers not only makes for a leaner A/F ratio for max power but also allows you to run a much leaner ratio at part-throttle (in the 16:1+ range) and not have the engine "surge" from variations in cylinder-to-cylinder combustion. A bonus for the select few of us who cruise long distances in our built Mopars; if you know your engine has good quench you can experiment leaning the cruise A/F mixture and see how far it goes. An O2 sensor and readout are great for that.

Also like the article "kinda" touched on quench doesn't add much measurable performance by itself but allows you to run a higher compression ratio on less total ignition advance; this combined with a bigger cam to match would give a lot more power overall than an open-chamber engine built to run on the same level octane gas.