Compression ratio and compression test readings.

[A70Duster at aol.com]

Plus the ideal gas law equation does not work for air with a lot of volume change.

The reduced equation

P1V1/T1=P2V2/T2


is P1 * V1^Γ / T1 = P2 * V2^Γ / T2

where Γ = 1.35 for ambient air.

Γ for an ideal gas (helium, argon, etc.) is = 1.
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