Final answer:
To calculate the estimate air-delivery ratio using a compressor efficiency of 0.65, detailed information on the pressure ratio (boost) and other thermodynamic properties is required, applying formulas that account for the efficiency to determine the compressor's performance.
Step-by-step explanation:
To calculate the estimate air-delivery ratio using the measured boost and assuming a compressor efficiency of 0.65, you would need to apply thermodynamic principles based on the characteristics of the compressor and the properties of the air. These would involve calculations using specific ratios, temperatures, pressures, and the efficiency value given. In this situation, the efficiency of 0.65 or 65% would be used to estimate the actual performance compared to the ideal performance of the compressor.
For an accurate calculation, additional information such as the pressure ratio (boost) is required. Since this value is not provided, a specific answer cannot be computed. However, assuming the known value of air density at sea level is 1.25 kg/m³, one would typically proceed by applying relevant formulas from fluid dynamics or thermodynamics, involving parameters such as inlet and outlet temperatures, pressures, and the specific heats of air, to find the air-delivery ratio considering the mentioned efficiency.