Compressor Map Spreadsheet_Public
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ABCDEFG
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AssumptionsUse these to plot points on compressor maps
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Intake Manifold Temperature (*F)300Pressure Ratio*Required Airflow (lb/min)Required Airflow (CFM)
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Displacement (Cubic In.)1221.6812.00173.66
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Volumetric Efficiency† (%)85%
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Desired Horsepower300Other useful numbers
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RPM @ Desired HP5500MAP Required (absolute psi)Boost Required (psi)
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A/F Ratio @ Desired HP1320.545.84
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*Pressure Ratio Assumes a 2.5 psi loss of pressure between turbo and manifold and 1 psi pressure depression in the intake manifold
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†Generally, peak volumetric efficiency occurs at peak TORQUE, not peak horsepower. This may not be true for engines with variable valve timing timing; some motors with this technology have exhibited peak VE of over 100% occuring at peak horsepower RPM, not peak torque. For these engines, the estimates given above may prove to be more accurate.
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16.387064CC/CI
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1991Displacement CC's
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121.50Displacement CI
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