its impossible to get 5-10psi from an electric supercharger for more than 30 seconds at a time on an automobile. we are talking about hundreds of amps here, dedicated banks of batteries in the trunk, and huge thick copper wiring. the reason its impossible is because you dont have enough space in the car for all the batterys needed. not to mention the heavy 100lb motor needed to drive a supercharger like that.
i have seen the kit which does this, and its goot for 10 seconds of electric boost. real legit electric kits. they have a baknn of golf cart batterys in the trunk, some kind of large a/c motor in the trunk as well, and ducting going to the front of the car to provide a path of air flow from the supercharger in the trunk to the intake under the hood.
all those ebay kits are is just ventilation fans from the bilges of power boats, some are just computer fans in a plastic duct. those things cause more of a restriction than anything. they actually rob you of power.
its very easy to make boost with a small blower. its also very easy to make cfm with a small blower. the problem, and this is where most prople fail, is making high boost and high airflow together. think about this. a 12v cigarette lighter compressor can put out 160lbs of boost, but unless youre engine has air airflow requirements of a weed wacker, that thing is useless.
a gas powered lawn blower can make lost of cfm, hundreds of it actually. but gas powered leaf blowers dont even make 1 psi of boost. actually, all of the ones i have tested make less than 1/2 psi of boost.
so the problem, is getting boost pressure AND high airflow. you cant even get 1/10th of a psi of boost out of those ebay electric motor fans.
an easier way to think about it is to look at the power requirements of electric motors. a conventional belt driven supercharger can take anywhere from 25,000 watts to 300,000 watts to drive them. a turbo is more efficent but still relies on power from the exhaust gas to drive, say anywhere from 15,000 watts to 250,000 watts to drive, (this is all depending on the application and stupid details which dont actually matter in the aspect of this discussion.
look at the alternator of a vw, lets say you upgrade to one of those 90 amp jetta units. at full power the 90 amp jetta alternator puts out 1296 watts of power. yup, thats less than most toaster ovens, or electric hair dryers.
so we have 1300 watts to play with. now take away some power for the injection pump solenoid, some relays, maybe a headlight or 2
and perhaps a cabin fan. say we have 1000 watts left. thats roughly 1 horsepower wirth of power you have to play with. you think a electric supercharger can be driven off 1000 watts? thats not even enough to turn the starter on a car, much less the powerfull motor it would require for a real electric supercharger to actually do anything.
this post isnt ment to offend anyone here and i apologise if i have. i understand the novel idea of an electric supercharger. it seems like a good idea untill you actually gety into the mechanics of it. i looked into it myself. it just isnt practical from any stand point.
Topic: easy breathing intake for 1.6 NA (Read 12409 times)
