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The open source Field Operation and Manipulation (OpenFOAM) software was used to investigate the performance of a fully premixed, modern high-performance 4-valve, iso-octane, dual overhead cam (DOHC) engine with quasi-symmetric pent roof combustion chamber running at 1500 revolutions per minute. The peak pressure occurred at the TDC and had a value of about 30 bar. The results from this study show that the maximum combustion temperature occurred at approximately 95 degrees crank angle ATDC and has a volume averaged value of about 2700° K, whereas the actual computed peak temperature was found to be about 3000° K and it occurred at grid point 12630. The other temperatures which were found to be higher than the volume averaged temperature were found to be in the range 2968.81° K to 2974.01° K and correspond to grid point positions 12630 to 12633. The flame-wrinkling factor, Ξ = St / Su was found to be in the range 1.0 ≤ Ξ ≤ 3.8. The dynamics of the regress variable b was accurately predicted.