Yes, good design but it's a little weak, only 800Nm (but i'm not sure).
If you want to make a strong engine, look at the vaidas369 tutorials, there are 3 scenes which show how to make a great engine. I did a V6 who has 8000 Nm at 60 rad/s => 760 HP !
Moreover, are you sure the configuration of the rods are the best ? I think opposite rods in the same circle is the best (180°), like in the real engine. Here you place rod only 90° from each other, so there are some times piston doesn't ignite so it can't produce throttle.
My biggest proplem ist not the engine ... theyre al littlebit weak but powerful for my standarts . my problem is the Gearbox . i cant script so this is the biggest problem
I have a life too don't worry (Gf, friends, good study, familly, etc.). I learned how to script at a very low rhythm looking at the other scenes and trying to understand how they work. There are some tutorials on internet too.
All the "scriptman" are not nerds or nolife you know, it could be insulting for us !!
Take a little time to learn thyme scripting and you will be able to make scenes much more interesting!