The non conventional d-wave superconductivity in Heavy Fermion compounds seems to be triggered by spin fluctuations, which is in strong contrast to conventional superconductivity where smallest amounts of magnetism destroy the superconducting state. Especially in the CeMIn5 (M= Co, Ir, and Rh) series the importance of spin fluctuations due 4f conduction electron hybridization as a trigger for the d-wave superconductivity has been intensively discussed. Here we want to systematically study the interplay of superconducting transition temperature Tc and the energy scale kBT of these spin fluctuations. The superconducting transition temperature can be easily varied by substituting Rh with Ir in CeRh1-xIrxIn5 (see phase diagram below) and the energy scale kBT of the spin fluctuations can be determined via the quasielastic line width in an inelastic neutron scattering experiment.