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Measuring the volume of the cylinder head combustion chamber<br />
TIP<br />
To obtain the highest performance for race use, the four cylinders should be uniform. If<br />
you modify the head cylinder, always measure the combustion chamber volume and do<br />
the work based on the measured value.<br />
Measure the volume of the combustion chamber of the cylinder head (commonly called the<br />
dome volume) as follows.<br />
Measuring equipment<br />
1. Burette<br />
2. Glass plate<br />
3. Oil (3:1 mixture of torque converter oil and white gasoline)<br />
4. Vaseline (to seal the valve and glass plate)<br />
Measurement method<br />
1. Tighten a regulation spark plug to the regulation torque in the cylinder head to be<br />
measured.<br />
2. Set so that the alignment surface of the combustion chamber is level.<br />
3. Apply a thin coat of Vaseline to the valve face and set the IN and EX valves.<br />
4. Apply a thin coat of Vaseline to the combustion chamber alignment surface and set the<br />
glass plate.<br />
5. Add drops of oil from the burette. The total added amount is the volume of the cylinder head<br />
combustion chamber.<br />
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