Electric Supercharger Options

[Drew-887]

I want everyones honest opinion on this. What do you all think about an Electric supercharger on a celica?


here is an example: http://cgi.ebay.com/ebaymotors/ws/eBayISAP...bayphotohosting

[boosted_K2]

okay... so this centrifugal electric blower flows 1200 CFM of air (which is pretty damn impressive i might add)

on a 3sgte motor say you want to run a standard 13 PSI, you would need to be running 431 CFM with a 1.88 pressure ratio at 7200 RPMs... this means you need to be running 431 CFM @ 1.88X the atmospheric pressure. at 26 PSI you are still only at 634 CFM with a 2.77 Pressure ratio.

so whats it all ammount to, well you really have no clue what this electrical unit is capable of. obviously its max 1200CFM is BEYOND overkill for any application we would be using it for, so when a fan wants to push more air and isnt allowed to, it has alot of restriction on it, which causes alot of current draw from your battery, and causes the fan to heat up and possably burn up. i can also almost guarantee you will feel alot of power surging because it's fan speed will be limited by nothing other than the resistance put on it by the air since there is no VFD controller on it (just an on/off toggle switch as described in the ebay posting), so it really depends what kind of static pressure the unit is capable of holding, alot of this "they dont do anything, they are just a fan" is true because they are not capable of holding that pressurized air like a turbo or true centerfugal supercharger is designed for, these electric units usually are not intended for use in high static pressure applications, usually they are just use for circulation where there is little restriction, not an application where when the throttlebody closes, the entire system is 100% blocked. id be interested to see what kind of pressure drop they are able to hold across the fan, but i still think for the other reasons mentioned they aren't quite capable of being used for this type of application yet.