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Masani
04-26-2011, 03:36 AM
Sorry if this has already been addressed, but what are your thoughts on electric superchargers? They look like cheap little plastic things, yet they claim to provide 2-4 psi of boost. An amount that seems reasonable for my little 4afe. If no one has tried it I may do it and post my findings.http://exmotorz.com/electricsupercharger/turbo5.jpg

4thgenceli
04-26-2011, 03:56 AM
I have some waxing compound that will improve your areodynamics by 3% and help you put the power down to the ground if you're interested.




Or you can get a leaf blower and achieve the same effect (which is basically nil).

Masani
04-26-2011, 03:59 AM
Hmm, too bad.
Wouldn't that work, in theory, though? If the blower were strong enough?

grimmythereaper
04-26-2011, 04:00 AM
most ppl dot have faith in the 4afe so i would say not a lot is known about the "safe zone" for the internals but i have seen the size of the rods and they are very small, just keep that in mind b4 you boost the 4afe bc if ur not careful u may blow the engine all together . And please someone correct me if im wrong but isn't 1 psi extremely close to 10 hp?

CollapsedNut
04-26-2011, 04:04 AM
Ill elaborate for Timmy.

The problem with these things is, they are gimmicks.
They simply cannot force enough air running on 12v system at say....40amp.
You wont be able to produce any boost because the vaccume of your engine is 10x greater than amount of air the fan can move.
Now I dont doute that someday with technological upgrades we will be able to use an electric fan to provide boost, but not yet.

Also with any boost, you need fuel managment and upgrades. Then the price is comparable to doing a real turbo.

4thgenceli
04-26-2011, 04:08 AM
Yes, in theory it could.

But by the looks of that picture, the housing is plastic. Most likely the internals are plastic too. Have you seen the mythbusters episode where they are trying to find the ideal speed to grenade CD's? Here's the youtube clip of it (goto about 7 or 8 minutes in or watch the whole thing).

JOb6Z5Tja68

FYI< it's ~23k RPM before it goes BOOOM.

Anyway, back to your question. That's a CD. Now think about that (if it is) plastic turbine on the inside spinning at who knows how fast. What if it gooes boom? Lil' plastic shards in the engine no bueno my friend.

Anyway, worst case scenario :)

IMO, 'electric turbo/superchargers' are snake oil.

CollapsedNut
04-26-2011, 04:17 AM
So many vids on youtube of electric turbos and superchargers, yet no one ever has a boost gauge to show what its doing. Suspicious? I am.

grimmythereaper
04-26-2011, 04:22 AM
not to give anybody any ideas but this is the same concept

http://www.youtube.com/watch?v=5xE3m5PHCIE

Doowstados
04-26-2011, 04:39 AM
http://www.youtube.com/watch?v=ngRdKSh99YU&feature=related

Just sayin'

jaydog82
04-26-2011, 06:53 AM
all the ones you will find for sale are junk, i bought one some time ago just to see and a hair drier blows more air then the thing i bought. i also bought 2 boat bilge fans and ran them in line, the problem is that they can move air, but they will not produce any boost. spend your money on actual bolt ons and not on junk. the idea of an electric supercharger is sound if you can produce boost and the gains out way the parasitic loss in electricity.

Galcobar
04-26-2011, 09:24 AM
There's a significant difference in the ability to move large volumes of air, and the ability to create a pressure stream of air.

A palm frond can move a lot of air, but doesn't create much pressure.

CollapsedNut
04-26-2011, 02:34 PM
http://superpowercharger.com/

Also check out there youtube vids, this guy actually explaines whats needed and how to make it work properly. He also explains that there has been compaines in the past that made electric
superchargers that do work, however, the cost of producing these units was so high that they couldnt sell them.
These guys sell kits that do work and do make boost, but your looking at $4000 and then some.
Look at whats included in this kit and youll see why you cant just stick a fan in your intake.
http://superpowercharger.com/spc-50%20aircrusher-hv.htm

MrWOT
04-26-2011, 08:21 PM
Knight turbo made a real one a long while back. It's the same as a centrifugal supercharger, except you drive it with an electric motor. They are very expensive.

rizin
04-27-2011, 04:22 AM
Doing the math on that kit that CollapsedNut posted it uses 10514.368195 watts. That is 745.699872 watts times 14.1 hp. doing that at 42 volts you need 250.3421 amps. I don't have a wire chart I can look up but that wire from the wire to the power source would be large. Now if it is done with a 12v battery would take 876.19735 amps. Even a 14.4 volt system that would not drop with high draw would need 730.164458 amps. So this being said if you use a motor that is running at 20amps and 14.4 you will get 288 watts. That is 2.589236 hp. So if it takes 14.1 hp electric motor to make 6 lbs of boost on a well designed system and you put this motor on the super charger kit not counting in all the parasitic loss or other factors to make boost it would only make 1.101803 lbs of boost and this is comparing just the hp to boost levels. So if you say 1lb of boost equals 10 hp then this kit would not make crap for power compared to simple bolt on items.

Just my thought about this.

CollapsedNut
04-27-2011, 02:06 PM
Doing the math on that kit that CollapsedNut posted it uses 10514.368195 watts. That is 745.699872 watts times 14.1 hp. doing that at 42 volts you need 250.3421 amps. I don't have a wire chart I can look up but that wire from the wire to the power source would be large. Now if it is done with a 12v battery would take 876.19735 amps. Even a 14.4 volt system that would not drop with high draw would need 730.164458 amps. So this being said if you use a motor that is running at 20amps and 14.4 you will get 288 watts. That is 2.589236 hp. So if it takes 14.1 hp electric motor to make 6 lbs of boost on a well designed system and you put this motor on the super charger kit not counting in all the parasitic loss or other factors to make boost it would only make 1.101803 lbs of boost and this is comparing just the hp to boost levels. So if you say 1lb of boost equals 10 hp then this kit would not make crap for power compared to simple bolt on items.



Just my thought about this.

Did you account for the 1:2 gear increase? I did the math and got a differant answer than you. Ima check my work.
Also In the video he claims that the alt they supply makes 260+ amps, tho he doesnt say what rpm range.
Also thye say it uses 3 4.7hp motors, not just one 14.1hp. I donno if that makes a differance tho.
"it uses 10514.368195 watts. That is 745.699872 watts times 14.1 hp. doing that at 42 volts you need 250.3421 amps." Is that not within the systems capacity?
Just some food for thought here, not attacking you.

v8killer
04-29-2011, 06:04 PM
believe it or not the right one does indeed work. enough to be noticeable, havent tried on a car that matters like a celica but i did it to a honda and it worked pretty well for spending less than 100 bucks