T 2 T 1 {\displaystyle {\frac {T_{2}}{T_{1}}}} = {\displaystyle =\,\!} ( p 2 p 1 ) γ − 1 γ {\displaystyle \left({\frac {p_{2}}{p_{1}}}\right)^{\frac {\gamma -1}{\gamma }}} Where: T 1 {\displaystyle T_{1}\,\!} = ambient air temperature T 2 {\displaystyle T_{2}\,\!} = temperature after the compressor p 1 {\displaystyle p_{1}\,\!} = ambient atmospheric pressure (absolute) p 2 {\displaystyle p_{2}\,\!} = pressure after the compressor (absolute) γ {\displaystyle \gamma \,\!} = Ratio of specific heat capacities = C p / C v {\displaystyle C_{p}/C_{v}\,\!} = 1.4 for air C p {\displaystyle C_{p}\,\!} = Specific heat at constant pressure C v {\displaystyle C_{v}\,\!} = Specific heat at constant volume