Compression Ratio Calculator
Result:
Your compression ratio will appear here.
Head Skimming Calculator
use this calculator to calculate how much to skim your head by to reach your desired compression ratio
Result:
The amount to skim the head will appear here.
Squish Band Percentage Calculator
A commonly used squish band percentage for 2-stroke engines typically falls between 40% to 60% of the bore diameter. This range provides a balance between optimal turbulence for good combustion and preventing detonation or engine knock.
40%: Provides more combustion chamber volume, which can help with smoother power delivery and slightly less aggressive combustion.
60%: Offers a more aggressive squish area, which increases turbulence and improves combustion efficiency, but it may also raise the risk of detonation if not tuned carefully.
For high-performance applications, such as racing, the squish band is often optimized closer to the 50% to 60% range, while for more general-purpose riding or off-road applications, it may be kept closer to 40% to 50% for greater reliability and smoother power delivery.
Results:
Current squish band percentage:
To achieve your desired squish band percentage, the squish band width should be:
2-Stroke Port Timing Calculator
Step 1: Calculate Port Timing
Port Timing Results
Enter the port opening and closing degrees to calculate the duration.
Step 2: Calculate Port Height Change
Port Height Change Results
Enter the current and desired port durations to calculate the required height change.
BTDC Distance Calculator
BTDC Results
Enter stroke length and timing degrees to calculate the distance.
Engine Displacement Calculator
Displacement Result
Enter bore and stroke to calculate the displacement.
Airbox Volume & Air Inlet Calculator
Results
Enter engine displacement and target RPM to calculate the recommended airbox volume and air inlet area.