ECU: (Does affect PP)
There are two ways to reduce the power of your car you comply with either a Maximum BHP restriction or to reduce the PP to be under a required limit.
The Full Control Computer is available from the Tuning Shop and allows you to restrict the power of your car, useful for getting your car under a PP limit. ECU Output adjustment is an electronic restriction that reduces power across the full rev range of your engine. You can also gain a bit of fuel efficiency when restricting power this way.
Power Restrictor is available from the Tuning Shop and allows you to reduce the power and therefore reduce Performance Points. Power Restrictor reduces airflow and usually means that it more effects top end horsepower, but lower end torque remains less affected.
Ballast: (Does affect PP)
Ballast is available from the Tuning Shop which allows you to add up to 200kg of additional weight to your car to reduce your Performance Points to allow your car to pass a minimum weight limit or to fall under a certain PP limit.
The interesting thing about Ballast is that you can also change the positioning of where in the car the ballast is placed. From -50 (forwards) all the way to 50 (rearwards)
This adjusts the static weight distribution of the car.
A car that has more rearward weight bias will have more rear grip on-power but can suffer with over-rotation off throttle and on corner entry. Many of the Mid-Engine or Rear-Engine cars can suffer with this.
Moving the Ballast forwards in the car can greatly help with this. It s a surprisingly effective tuning aid, but only if you require ballast to be added to get under a PP limit.
Furthermore, the PP calculations seem to be glitched in such that the PP numbers can reduce greatly by simply moving the Ballast positioning forwards by a few points.
If you are tuning to get below a PP limit then I would highly recommend using some Ballast and have it positioned Mostly forwards, play with the exist position and keep rechecking the PP until you get it as low as possible and then you can add performance back into the car by either adding more power or adding more front downforce.
