Electric Supercharger

[dwarfy.mafia]

http://cgi.ebay.com/ebaymotors/ELECT...QQcmdZViewItem



These things acually work??
Im guessing no, but you never know
What are your guys thoughts

[mcqueary]

To me, the fact that the seller hides his feedback comments and has lots of negative feedback says it all. What doesn't he want us to see? I wouldn't buy anything from this seller.

[Whoaru99]

Eh. Think I'd pass...

I seriously doubt that thing can make 2-3 PSI boost pressure at WOT.

Just for shits and grins, ask 'em for a couple of dyno run printouts and see what you get - if you get any kind or response at all. Also, ask for the static pressure vs. CFM flow curve of the blower and see what you get.

[BADBOY#1]

Ive seen them work. quiet impresive. a tiburon that counldnt spin passed first gear could spin right into third gear. seen one installed on a cavalier was also impressed. but of coarse as mentioned earlier you do have to be careful with who you deal on ebay and the way you do it.

[Whoaru99]

Well, I can't say for sure since I've never personally tried one. But, I find it hard to imagine a device that made such a big improvement would be sold for only $80 - on E-Bay none the less.

[Alibi]

I did a little looking around on the internet and found that this object falls under the same category as turbonators and pills--trashy gimmick. A mechanical turbine is powered by either exhuast (turbo) or is belt-driven (superharger) and therefore can spin very fast--fast enough to create enough PSI to make a difference. However, a turbine powered by a 12v car battery just doesn't have the power to spin a turbine fast enough to create high enough PSI. However, a higher-voltage system, say 30 volts, *might* be worth a shot if you can figure out how to generate the power.

This is from several other forums...I kinda wish I had kept the links but if you want more just google "electric turbo really work" and see what it kicks up.

I'd say the [fake] K&N filter hid the fact that the electric turbine is just a gimmick...

[BADBOY#1]

Well thats the way she goes. some things go buy opinion and some dont. maybe they only work good on honda civics or stuff like that since they dont have more power than a sewing machine

[HotZ28]

JUST DOING SOME THINKING HERE

Well, it looks like another “miracle” is on the market in the form of an “Electric Supercharger”! I wonder if this gadget would work in conjunction with the "Turbonator". If so, I could add both of these to my intake, prior to the Eaton M62 Supercharger and get 20 lbs of boost! Of course if I did that, I would need the “gas line magnet” and “pills” to put in the gas tank to generate enough octane to keep the knock retard from kicking in.
This could really get interesting!

GONE TO DO SOME MORE THINKING!

[ChevyWonTon]

Originally Posted by Whoaru99

Also, ask for the static pressure vs. CFM flow curve of the blower and see what you get.

Any idea what this flow curve looks like for a "normal" Turbocharger/supercharger? I've never messed around with either of these, so I don't know much about the "numbers" involved. But, a flow curve should allow calculation of the input power requirements, either in the form of exhaust drag from a Turbo or belt load from a Supercharger.

I'd be interested myself in the typical load (in HP?) of a Supercharger at peak output. For instance, a 5 HP load would require an electric motor of almost 4 KW, which would draw ~30 Amps at 12.6 V.

So, how close is 5 HP to the actual load? Anyone have some load numbers for a Turbocharger or Supercharger they can pull off the top of their head?

Or, are you gonna make me go and get out the calculator?

[Whoaru99]

Originally Posted by ChevyWonTon

Any idea what this flow curve looks like for a "normal" Turbocharger/supercharger? I've never messed around with either of these, so I don't know much about the "numbers" involved. But, a flow curve should allow calculation of the input power requirements, either in the form of exhaust drag from a Turbo or belt load from a Supercharger.

I'd be interested myself in the typical load (in HP?) of a Supercharger at peak output. For instance, a 5 HP load would require an electric motor of almost 4 KW, which would draw ~30 Amps at 12.6 V.

So, how close is 5 HP to the actual load? Anyone have some load numbers for a Turbocharger or Supercharger they can pull off the top of their head?

Or, are you gonna make me go and get out the calculator?

Afraid you're going to have to get out the calculator and do some searching.

Thought I read somewhere that the supercharger on a Top Fuel dragster takes several HUNDRED horsepower to drive it - but that's a pretty extreme example.

[ChevyWonTon]

Originally Posted by ChevyWonTon

For instance, a 5 HP load would require an electric motor of almost 4 KW, which would draw ~30 Amps at 12.6 V.

Well, I should have gotten my calculator out BEFORE my last post! I just realized that this would be more like ~300 Amps! I don't think that's going to happen.

Also, I searched the web and found an article on HotRod that estimated a typical Supercharger loss of 70 HP. (See http://www.hotrod.com/techarticles/t...er_comparison/)
and that just makes the electric motor requirements a lot worse.

My Conclusion: You can't drive a Turbocharger or Supercharger on electric power unless you have a really long extension cord hooked to AC Power driving a really big motor! Better just use a regular ole' Turbocharger/Supercharger.

[BADBOY#1]

Originally Posted by ChevyWonTon

Well, I should have gotten my calculator out BEFORE my last post! I just realized that this would be more like ~300 Amps! I don't think that's going to happen.

Also, I searched the web and found an article on HotRod that estimated a typical Supercharger loss of 70 HP. (See http://www.hotrod.com/techarticles/t...er_comparison/)
and that just makes the electric motor requirements a lot worse.

My Conclusion: You can't drive a Turbocharger or Supercharger on electric power unless you have a really long extension cord hooked to AC Power driving a really big motor! Better just use a regular ole' Turbocharger/Supercharger.

Were not talking about a 10 h.p. electric motor that you would have to run 2 altnators to keep the battery charged, and that pushes 15psi of boost here. were talking about a electric motor thats about the size of a fist with a turbine pushing a very max of 3psi. there is also no power loss because its not belt driven off the crank. these kits also come with a chip and a air filter.this makes for cheap power and helps the gas milage

P.S whats up with this power cord and AC power thing. were not trying to knock off 3 seconds off or 1/4mile time here.and whats up with the 5hp load at 4kw that equals out to 300amps. plus you cant compare something that runs off the crank "which yes you do lose a bit of power"(like a regular supercharge) to something that gets no power what so ever off the crank??

[ChevyWonTon]

I know perfectly well what we're talking about - I'll explain myself in more detail...

I'm quite familiar with the laws of power conservation, and you must supply a certain amount of power to create a certain amount of pressure boost at a certain flow rate. Please note: you don't get power for free, so you WILL have power loss from somewhere! I was estimating the type of electric motor that would be needed to get moderate boost. To create any boost, an electric motor is going to output some amount of mechanical power by drawing slightly more electric power which the alternator will have to supply, and that IS running off the crank.

Since this little electric motor sounds like ~1/10 HP, comparing it to a typical supercharger with 70 HP of input at the drive belt leads me to believe that this little gem must really crank out the boost! Let's estimate the power gain at ~2 HP just to be extra generous - point is, I don't think anyone's going to notice it. It's certainly not going to spin the tires into 3rd gear without some other help. You'd get just as much extra horsepower whenever a High-Pressure weather front moves into the area (Organic Supercharger?).

Additionally, I can't imagine why anyone would think a little BOOST is going to HELP gas mileage at all. If it did, all cars would have one of these under the hood because OEM car companies like GM pay Federal penalties for lower vehicle fuel mileage.

I'd install the new chip and air filter and leave the rest of the parts off the car. As another post already pointed out, these gadgets are honestly gimmicks. I only wanted to apply basic engineering knowledge to justify that rating. I hope we've demonstrated mathematically that this device is not really practical.

(By the way, two alternators would not be enough to run a 10 HP electric motor. I already did the math for a 5 HP motor, and you're gonna need 6 good alternators (~100 Amps each) for that 10 HP (7500W) electric motor! And that's not even close to the supercharger mentioned in the article I referenced.)

[Whoaru99]

A few relatively simple calculations...

I've assumed a 2.0L engine at 7000 RPM.

This gulps about 222 CFM, to make 2.5 PSI boost you need to stuff about 260 CFM into the engine.

To make 260 CFM at 2.5 PSI requires about 4.3HP. I don't believe you are going to get 4.3HP from a motor the size of your fist that is driving the blower fan.

4.3HP = 3.2kW = ~225A at 14.4V

[BADBOY#1]

You all have very good arguements that make sense.....but have you ever seen one work...or tried one yourselfs?? Thought id ask the question