The inclusion of C5 and C7 for the modeling of thermo-chemical ablation of carbon-carbon graphite materials will be discussed. Results from a coupled CFD solution will be compared to experimental data from the PANT program. The results are shown to not match well at high stagnation pressures even with the addition of C5 and C7 subliming from the surface. A micromechanical ablation model as proposed by McVey and Ziering was incorporated into the CFD solver. Results are then compared to the available PANT data and future work in modernizing the micromechanical model is discussed.