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Similarly, do oversize pistons give more power?
There are two primary reasons for boring the cylinders oversize: Enlarging the cylinder bore size makes the engine displacement larger, which means the engine has the capacity to “breathe” more air on every intake stroke, thus making it possible to burn more fuel and produce more torque on every power stroke.
People also ask, how do I know my engine bore size?
Here's how to use a dial bore gauge:
- Zero the gauge. This is accomplished by measuring across the gauge with an outside micrometer set to the precise bore size.
- Insert the gauge into the bore to the depth you need. Rock it back and forth until it's properly inserted in the pipe.
- Look at the reading.
If there's too much clearance, the piston could rock back and forth inside the cylinder and damage the rings, cylinder walls, or skirts. If the clearance is too tight, then the piston can seize in the cylinder as it expands due to combustion heat.