Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2010.107.115.Semin IsmailA.R. NugrohoT.F. 22010102This study has been investigated the effect of diesel engine convert to sequential port injection dedicated CNG engine on the engine cylinder pressure performance. This research has using GT-Power computational engine model for steady-state and transient simulation and experimental investigation. The investigation and simulation of the engine cylinder pressure performance characteristic profile based on variation engine speed. The engine computational model and experimental has developed based from the diesel engine converted to port injection dedicated Compressed Natural Gas (CNG) engine spark ignition. The simulation and experimental results of cylinder pressure characteristics are shown the cylinder pressure profile and maximum cylinder pressure characteristics. The results shown that the conversion development has decreasing the engine cylinder pressure.]]>Christopher, M.A., J.T. Gregory, L.T. Michael and N.C. Nigel,1999108813836Blair, G.P.,1999pp: 1-840pp: 1-840Catania, A.E., D. Misul, E. Spessa and A. Vassallo,2004113682703Challen, B. and R. Baranescu,20032nd Edn.,Eriksson, L. and I. Andersson,20022002Heywood, J.B.,19982nd Edn.,Hollnagel, C., L.H. Borges and W. Muraro,19991999Klein, M. and E.L. Eriksson,20022002Kowalewicz, A.,1984pp: 365pp: 365Piedrahita, C., A.R. Riaza and F.Q. Héctro,20032003Sanders, S.T., T. Kim and J.B. Ghandhi,20032003Abu Bakar, S.R.,2007211651169Semin, A. Idris, R.A. Bakar and A.R. Ismail,200926443452Semin, A., R. Ismail and R.A. Bakar,200822361372Richard, S.,19972nd Edn.,pp: 102-305pp: 102-305