Lifting a Vehicle over a Pit

[tigerstyle]

problem is water is most dense at 4degrees.,  so you would need to fill the water in at 4degrees to get maximum capacity.. even then it wont expand a Huge amount,

even then you are only looking at about an 8-9% increase in volume given the amount..  that's not much

I know this is only shitposting so it doesn't matter, but the above makes no sense. 

It doesn't matter what temperature  water you fill the pit with (assuming it is >4°C) as the freezing elements will bring it from whatever temperature down past 4°C to freezing. You can't decide what temperature water you want to freeze? It freezes as zero. As long as you fill the pit then it is  full. 

You only need to fill at 4°C to get maximum density not capacity, a 1000 litre pit is always a 1000 litres. And once frozen is irrelevant to the strength, as you can't control the density of the ice.