On the Lancia 205 t16 when you change the rear bumper to the street one the PI number can jump by as much as 11 points depending on the other upgrades, does this bumper actually effect handling and speed or does the PI number jump up for literally no reason? My thought was that maybe it acts as a diffuser and helps downforce but I’m really not sure how to test this or if it’s true. Does anyone know?
Weight gain/loss, downforce difference, it can affect every aspect of the cars physics.
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