Slot Car Racer and Builder
I would imagine that would hardly be any magnetic affect at all?? We don't regularly measure cars but at a recent race we ran some Scalextric BTCC cars - it seemed a stock car out of the case had around 150g downforce and some of the guys with tuned cars had well over 200g - we had a bit of a chat about where we would go with that given the huge difference.150g of magnetic downforce is HUGE!!!
...we have a 25g limit