I'd like to tweak engine of Cadillac CTS-V. I want to downsize power and torque, also change gears. It should be used as a training tool for my mother. Last time she drove a car maybe 20 years ago. I know, it's a bit funny, but at least she won't wreck real car and we also have manual gearbox. It would be good to use even 5th gear for 100kph. I looked into .eng file but there are weird power/torque values practicaly for every car. What do they mean? Thanks for some advice.