Set MaxOverTorqueDamage and MaxTorqueRating to 0 in the engine jbeam. --- Post updated --- Notepad++ https://notepad-plus-plus.org/downloads/ if you dont have it installed. It will be needed for opening the engine jbeam. Then you drag the engine jbeam to desktop right mouse click and open with Notepad++ and after replacing the 2 lines save and put the engine jbeam back in the folder of your mod.
Then maybe raising the physical engine RPM limit? It all depends on what kind of damage you are getting