Hi, working on a project and I need some assistance due to my lack of education in mechanical engineering. With that said I will be as specific as possible. I need to figure out how much PSI is exerted on a piston during the power stroke in an external combustion emgine. I'm not sure how to calculate that figure. The information I do know is my theoretical 6 cylinder engine has a cylinder diameter of 135 mm and a stroke of 150mm and produces 1200 ftlbs of torque. I would imagine that with this information I should be able to calculate the amount of force produced by each cylinder, and that number would be my PSI exerted to the piston during the power stroke, correct? A little humiliated by my lack of knowledge for I never studied mechanical engineering so I apologize for my incompetence. But any help with this matter would help exponentially and if I need to give anymore information please tell me specifically what you need. Thank you!