Posted by sean on July 19, 2002 at 20:53:22:
In Reply to: Re: what is the difference between the turbo charger and kompressor posted by tony on July 23, 2001 at 03:46:39:
Eram is a joke to the e-supercharger industry.
axial flow doesn't create pressure it is designed to flow alot of air.
centrifugal design is more promising
it can create pressure on air flow but just not much air flow in low rpm.
efficiency of these things are just way too low that it requires about 80,000 rpm to create about 8 psi on 2000cc motor.
so far I found the brushless motor which can run upto 30,000 rpm in in 80percent duty cycle. but this is not enough pressure. It might create about 3psig but the centrifugal housing and impeller has to be damn near perfect design.
mixed airflow design is the future of the electric
supercharger
new blade design and housing design can create decent amount of pressure (about 3~5 psig) for very low cost.
that should give your car a good 20~30hp gain and won't compromise the fuel map on todays car (which means you won't change your fuel pump or change your chip)
the way I look at those ebay e-chargers, I think the maker just took the parts from the leaf blower and selling it. (don't waste your time on these things. it's loud and impractical)
just buy a leaf blower from walmart. I think it will perform just the same.
anyone who has interest in developing the mixed flow compressor design, feel free to email me.