Supercharger/turbo(ebay)

Hi all ! been looking on ebay, and came across this,i know there was another similar crap gadget on there before, like for just £15.00 or something, but this seem's a bit steep in price of £135.00!! Does this item work on the same principal as that crappy one listed over amonth ago ! read the buyer's comment's and all are happy with product, but i suppose they would say that

wouldn't they !!

http://cgi.ebay.co.uk/Electric-supercharger-Turbo.TOYOTA-MR2-SUPRA_W0QQitemZ22016. :search:

Link's not working for me.

I cant see the link but I will still wager its a piece of cr*p

Yes mate, it is a piece of shite. Cant see the link but i know its one of them electric superchargers. All they are is an inductuction filter, with a 12v pc fan which you can blow harder than that can. Stay well clear, cheap tack that wont work.

And please tell me you weren't contemplating putting that on a supra????

Def not mate, just thought it was steep in price for that kind of crap !!, i'll try and sort link out cos it's not working for me now ! :blink:

25,000 RPM instantly!

:blink:Yea right...!

Cheer's mate , beat me to it !!

If you look at how much power it takes to drive a real supercharger, and convert it to electrical units, you'll find that the performance gains will be negated by the weight of the generator that will be needed

http://www.autospeed.com/cms/A_0237/article.html?popularArticle

So, how much power does it take to drive an efficient supercharger like a screw type? The most efficient type of supercharger, flowing 265 cfm and developing a boost of 11.5 psi, takes 14.5kW to drive it. Figures aren't readily available for centrifugal blowers, but they'd be of a similar magnitude. So the best blower design (the same type that's used on the Mazda 800) takes about 14,500 watts to drive it on a modest-sized engine. This power is derived from the engine via a belt connecting the blower to the engine's crankshaft.

But let's say that instead of using a belt-drive from the engine, we power the supercharger by using a 12 volt electric motor powered from the car battery. For an electric motor power of 14,500 watts, we'd need a current flow of about 1000 amps (14,500 watts divided by 13.8 volts = 1050 amps). So, to supply the current to drive an electric supercharger having the same airflow output as the most energy-efficient type currently available, it would take 1000 amps. To generate this much electrical power would require at least 8 heavy-duty alternators bolted to the engine. Furthermore, to handle this current, the wires connecting the battery to the supercharger would have to be enormously thick - perhaps brass or copper bars 10mm square would be needed.

There is a working electric supercharger, but it's a bit more complex than the ones on eBay, and it needs at least four extra batteries:

http://www.turbomagazine.com/tech/0406tur_knight_turbo_electric_supercharger/index.html

And ALOT of room in the engine bay aswell

It would probably make a nice generator if you wired it in reverse and let the engine suck the fan round

Stay well away from it.

It would probably make a nice generator if you wired it in reverse and let the engine suck the fan round

Clever

Stay well away from it.