![The squash or squish band is the clearance between the head and the top of the piston. First you need to know the different types of combustion chambers to understand this. The squash or squish band is the clearance between the head and the top of the piston. First you need to know the different types of combustion chambers to understand this.](http://www.mecoa.com/faq/squish/dwg.jpg)
The squash or squish band is the clearance between the head and the top of the piston. First you need to know the different types of combustion chambers to understand this.
![Effect of combustion chamber shape on tumble flow, squish-generated flow and burn rate - ScienceDirect Effect of combustion chamber shape on tumble flow, squish-generated flow and burn rate - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0389430402002011-gr6.jpg)
Effect of combustion chamber shape on tumble flow, squish-generated flow and burn rate - ScienceDirect
![Effect of combustion chamber shape on tumble flow, squish-generated flow and burn rate - ScienceDirect Effect of combustion chamber shape on tumble flow, squish-generated flow and burn rate - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0389430402002011-gr1.jpg)