Re: Electric Supercharger?
Here are some facts I have been working on.
For arguements sake you have a 2 litre engine (it makes calculations easier).
On every revolution it sucks in 1 litre of air. (Its a 4 stroke so sucks in every other revolution)
That means if it idles at 800rpm it is sucking in 400 litres of air just at tickover.
At 6000 rpm the engine needs 3000 litres of air a minute or 50 litres per second.
If the fan is supplying any less it becomes a restriction, and none of these fans are even capable of supplying a 2 litre engine with enough air even at tickover.
If you are to get an meaningfull positive "boost" then you need the fan to supply more air than the engine is capable of sucking on its own, so that the air is forced into the cylinders instead of being drawn in by the vacuum created as the pistons drop.
This is why Turbo Chargers operate at speeds over 100,000 rpm and sometimes up to 250,000rpm they need to just to shift enough air.
You simply cannot buy electric motors that are capable of such speeds. At least not for "Affordable" amounts.
Giulietta 2.0JTDm (170), BMW 335i Cabrio