We're sorry it broke your configs, we forgot to include it in the change log, but Pessima did get some improvements to the pessima 2-liter engine. I've tried now and with some extra tweaking you can get the engine to survive 700 ish hp, thing is you have to keep the torque below 845NM (max torque rating that engine with ultra heavy duty engine block). To do that you can raise the rpm at which nitrous engages. If you really want to increase the engine performance and don't mind using mods to do that, you can very easily just raise the highlighted value to whatever you like. (highlighted variable is max torque for base engine, ultra heavy duty one multiplies it by 2.45) Location of the file by default Steam/steamapps/common/BeamNG.drive/content/vehicles/pessima.zip//vehicles/pessima/pessima_engine.jbeam for just quick local changes I'd suggest copying the whole file into appdata/local/BeamNG.drive/0.25/vehicles/pessima, since that way you're not changing any core game files. After you've done that, open the file with text editor of your choice, navigate to part called: "pessima_engine_dohc" and then locate line 344 "max TorqueRating" and just bump it up a bit.