To calculate the peak gas forces

[mac088]

Hello, guys

I am fresh, I have a problem about my calculate. I know Peak gas force=pressure*Bore Area

however how to calculate pressure. I knew diesel car max cylinder pressure is 180 Bar, but I do not gasoline car max cylinder pressure.

Could you help me solve this problem?

 

[Kozy]

Far too general a question. There is so many variables to consider. How do you 'know' that diesel max cylinder pressure is 180bar?