How can 12v push hundreds of amps, let's say 500amps at 0.024 ohms? clearly the starter motor can't have that little of resistance to turn the engine rapidly. Is there a some sort of boost converter included?
clearly the starter motor can't have that little of resistance to turn the engine rapidly
The starter motor does have a low enough resistance to draw the current it needs to turn the engine straight from the 12v battery. And it doesn't need to turn the engine 'rapidly', just fast enough.
Some vehicles will draw 1000A and more - the large HGV's (Heavy Goods Vehicle or also known as TIR - Trans International Routiers) for example, so cars in the range of 2 to 3 litres are usually around 400 to 600 Amps - just look at the thickness of the cables linking battery to starter...
However, newer starters have better technology and the current is coming down, but, if you think of the power needed to get an engine turning sufficiently fast to start then the current draw is significant.
If you take a starter motor apart - most of its weight is due to the amount of copper used in its construction.
And, a battery terminal can disappear in a puff of smoke if it is left loose and someone tries to start a 6 litre inline diesel .... I had to get the terminal on the battery replaced... Oh and it was not me - I was helping a mate out - replace terminal or new battery...