What is the squish of your cylinder and why is it important?
If you are tuning your scooter or motorcycle, you will inevitably arrive the term squish in return for. Squish is an essential concept when it comes to the performance of your motorcycle, especially with 2-stroke engines. But what exactly does "Squish" mean, and why is it so important for the performance of your motorcycle? In this blog post we will elaborate on what Squish is, how it influences your engine and why adjusting the squish of your cylinder can be an important step in optimizing your motorcycle performance.
What is Squish?
In simple terms squish The space between the top of the piston and the cylinder head of your engine when the piston is in the upper dead tip (TDC), so just before the combustion takes place. This "squish area" is the part where the air and the fuel mixture come together before it is inflamed by the inflammation. It plays a crucial role in the efficiency of combustion.
To express it in technical terms, Squish is the way in which the fuel-air mix in the combustion room area is compressed by the rapid movement of the piston. A good squish helps to create a turbulent air flow, which results in a more efficient and more powerful combustion.
How does Squish work?
The squish zone has a direct influence on the way in which the fuel-air mixture is burned in the combustion chamber. When the piston moves up to the upper dead tip, the space between the piston and the cylinder head becomes smaller and smaller. This ensures that the fuel-air mix is compressed in the Squish area.
A Well adjusted squish Ensures that the fuel-air mix is spread quickly and evenly through the cylinder, which results in more efficient combustion. It also helps to reduce the chance of so -called pingling (pre-inflammation) and ensures better cooling of the cylinder head.
The importance of Squish for Motor Performance
Squish is important for various reasons:
- Better combustion: A good squish ensures that the fuel-air mix is inflamed evenly and powerfully. This results in a faster and more efficient combustion, which means that your engine can generate more power.
- Improved performance: Due to the more efficient combustion, your engine can deliver more power. The squish helps to create turbulence in the combustion chamber, which ensures better mixing of the fuel and air, and therefore better performance at both low and high speeds.
- Cooling: The squish zone can also contribute to the cooling of the cylinder head. When the piston moves in the squish zone, the air in the room is accelerated, which helps improve the heat dissipation. This can reduce the chance of overheating, which is essential for the preservation of motor performance.
- Avoid pingling: A well -set Squish can help prevent pingling Or pre-inflammation, in which the fuel-air mix ignites early. This can be harmful to your motorcycle, but with the right squish the risk of this problem is reduced.
How do you measure and adjust the squish?
The squish is one of the few parameters that you can physically adjust when tuning your motorcycle. Measuring and adjusting the squish requires some precision and technical knowledge. Here are the steps you can follow to correctly set the squish of your cylinder:
- Measure the squish distance: The squish distance is the space between the top of the piston and the cylinder head when the piston is in TDC. This can be measured using a squish strip, a thin strip of material (usually made of aluminum or other soft metal) that is placed between the piston and cylinder head. When you rotate the engine, the squish strip distorts at the places where there is contact, which indicates the squish distance.
- Determine the ideal squish distance: The ideal squish distance is usually between the 0.6 mm and 1.2 mm, depending on your motor configuration and tuning goals. A smaller squish distance results in more turbulence and a faster combustion, but can also lead to overheating. A larger squish distance ensures less turbulence, but can make the engine less efficient.
- Adjust the squish: There are different ways to adjust the squish. You can adjust the height of the cylinder head by it flatten (for example by sharpening a piece of the head) or by a Other cylinder head To be used that already has an optimal squish distance. You can also piston height adjust by a thicker piston ring to use or edit the piston yourself.
- Test and refine: After you have adjusted the squish, it is important to test the engine and check the performance. It may be necessary to adjust the squish further to optimally match the engine to your driving needs.
What is the ideal squish for your motorcycle?
The ideal squish setting can vary depending on the type of motor and the purpose of the adjustment. In general, most tuners want a squish distance from approximately 0.8 mm to 1.0 mm for a balance between performance and reliability. Too small a squish can lead to overheating and possibly engine damage, while too large a squish does not fully utilize the performance.
Conclusion
The squish of your cylinder is a crucial aspect of your motorcycle performance. It affects the combustion, performance, cooling and the lifespan of your motorcycle. The proper adjustment of the squish can make your engine more efficient and more powerful, resulting in a better driving experience. Whether you are working on a simple adjustment or a complete performance tuning, don't forget to check and adjust the squish of your cylinder. A well -adjusted squish makes the difference between a good and a great engine!