you mean something like this:

http://cgi.ebay.com/ebaymotors/ws/eB...&category=6770

Doesn't work. it's good in theory, but nobody has actually put the R&D into designing something that would actually work. I'm not expert, but it seems to me that the amount of power you'd need to supply worth while pressure would exceed that provided by your cars electrical system. I'd imagine you'd need a bigger alternator or a second one, which would draw away from engine power anyway, at which point you could have just gone with a supercharger. :dunno:

but hey, if you're smart enough to design something that actually works, go for it. good luck, and don't sell your failures on ebay.