  We present the calculation of heavy Wilson quark mass renormalization
constants from large beta Monte Carlo simulations. Simulations were performed
at various beta larger than 9, each on several spatial lattice sizes to allow
for an infinite volume extrapolation. We use twisted boundary conditions to
suppress tunneling and work in Coulomb gauge with appropriate adjustments for
the temporal links. The one-loop coefficient obtained from this method is in
agreement with the analytical result and a preliminary result for the second
order coefficient is reported.
