When the compression is 11 or more with older chamber designs the quench is usually not quite as important as 10 and below. Quench will force the air and fuel mixture toward the spark plug, and makes the mixture burn more homogenous. Raising the compression tends to do some similar things. Most engine builders have a good grasp on a tight quench allowing the engine to want less timing for max power, but it seems like it still get overlooked often on builds. Quench brings all good things no matter what the compression.
We prefer to set the timing up so it comes in fairly late with higher compression, the timing curve’s are set up pretty much like factory curves on high output engines. Nothing really special. This engine has a modest .054” quench, it has some quench with the piston domes also.
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