This paper evaluates the lag time in a turbo charged single cylinder engine. The goal of this research is to increase the power output, reduce the fuel economy, and improve emissions through turbocharging. Due to the timing mismatch between the exhaust stroke, when the turbocharger is powered, and the intake stroke, when the engine intakes air, turbocharging is not used in commercial single cylinder engines. Previous work has shown that it is possible to turbocharge a four stroke, single cylinder, internal combustion engine using an air capacitor. An air capacitor is a large volume intake manifold, in between the turbocharger compressor and the engine intake to smooth out the flow. This work builds on previous theoretical and experimental work that shows that a turbocharger could be fitted to a single cylinder engine using an air capacitor to increase intake air density by forty three percent and peak power output by twenty nine percent. The capacitor system has been shown to work in steady state applications where lag time does not matter. However, the capacitor will increase the already significant turbocharger lag time. The goal of this work is to show a clear correlation between capacitor sizes and lag time. With this correlation it will be possible to size an air capacitor for transient applications. An experimental setup was constructed to evaluate the time it takes to respond to an increased load on the engine at a constant speed, and the time it takes to increase engine speed at a constant load.