A "quench" engine creates combustion chamber turbulence at TDC which makes more power.
Mr. Mad says you won't find it in 99.9% of engines produced, it's just too hard for OEM to mass produce with that close of tolerances.
That's why performance minded people have been spending the time and money to blueprint their engines to get that gain in power.
My answer to the original poster is YES it would make more power.
