  We present a systematic study of the diversity of three-dimensional
deflagration simulations of Type Ia supernova explosions arising from
variations of the initial parameters. By altering the carbon mass fraction, the
central density, and the metallicity of the progenitor white dwarf star, we set
up a grid of numerical explosion models. While changing the central density has
the largest impact on the explosion energy, the largest variation in the 56Ni
production is found by changing the metallicity of the models. Varying the
carbon mass fraction hardly affects the 56Ni synthesized although it alters the
energetics of the explosion. Possible consequences for the shape of light
curves of Type Ia supernovae are discussed.
