The quench combustion chamber is still a poly-angle chamber, just like the open combustion chamber. It has a bit of "squish" on either side of the valves, but not much. Just enough to boost low rpm torque and reduce the chamber volume. It is not a wedge chamber. Both combustion chambers achieve their detonation resistance the same way, via the shallow depth of the chamber and the poly-angle surfaces. The smallish "squish" surfaces present in the quench style chamber does not make it more detonation resistant than the open style chamber.
Ignition timing is about the same for both quench and open versions.
-G
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If you use a 351C 4V powered vehicle for a grocery getter ... the eggs aren't going to make it home!
