Time evolution (in units of t_turn) of vorticity and magnetic energy of runs with the shearing profile and different R (see Table A.3). If we use the shearing timescales, the magnetic instability is between 70 and 200 t_shear with more similar growth rates (see Fig. 5). In both cases, R = 1.00 and R = 1.50 take the least amount of time to reach the instability. Dashed lines represent the exponential fits for E_mag during dynamo growth (top panel), ω_rms during vorticity growth, and ω_rms during dynamo growth (bottom panel).