This what I found in Ebay, What are you think?

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1875259572

 

The idea of an electric turbo in itself is not a bad idea. However, this particular product is bogus.

That amperage draw of an electric turbo that could actually provide benefit is HUGE compared to what your cars alternator can provide.

This product is basically a cooling fan for a mainframe/server computer hidden in a fancy looking intake adapter.

Even if you stuck a giant alternator on your car, it wouldn't be nearly efficient as your standard mechanical turbo.

Where you could take advantage of electricity would be as a "booster" for a mechanical turbo. You could charge up some capacitors to achieve the desired voltage and then use that power to "spool up" the mechanical turbos with an attached motor before the exhaust pressure could actually get them spinning very fast. With proper design, the capacitors will run out of juice about the time that exhaust pressure takes over (the electric motor de-clutches). Capacitors then recharge waiting for the next low-boost situation. The new GT-R is rumored to use this technology.


Heh, heh. How about an engine powered turbo? Just add a motorcycle engine that spins the turbine for the car engine intake. Then of course you will probably want to turbo the motorcycle engine too...

--
Jeff

 

No, no, you need to supercharge the motorcycle engine to avoid turbo lag but you need to put Nitrous on both for even more power!!!

Of course if you had a honda i4 on a trailer hooked to a generator, you could generate enough juice to run some pretty outragous electric turbos...

Did Rube Goldberg ever design a car?

 

Technically it can not be an "Electric Turbo" it would be an "Electric Supercharger."

A Turbocharger uses exhaust gas to drive a mechanism to compress air. 99% on cars are centrifugal compressors, some are comprex or axial compressors.

A Supercharger uses some other form of "drive" to power the mechanism that compresses air.

 

The only one really works is eRAM.
I have been following electic supercharger for more than two years now. I personal feel eRAM price is high, but there is no other product come close to eRAM.

How much added pressure can be decided in two factors in these kind of products. The first one is air speed it puts out in open air. 70mph get you 0.5psi, 150mph get you 1psi. Now that's the case when your engine is not drawing any air at all.
If the charger also put out 450cfm as it claims at still air, you get maximum pressure when your engine at idle, and you get 0 pressure if your engine also draw 450cfm. From these two point you can draw a line and it will be close to the real case how it will work on your engine. (Z35 engine draw roughly 300cfm at full power)

For this ebay item, Since it didn't tell me air speed, I can't tell how much pressure it may put out. If it's outlet is 3" and flows 450cfm, I will say it's at 70mph. Quite impressive for a plastice fan, isn't it?

 

Another thing to consider, is that a turbo and a supercharger is basically a pump, while this device seems to be a fan. A pump is used to raise the pressure of a fluid, while a fan is good primarily for raising the flow rate. The efficiency of fans goes to crap as soon a little pressure is introduced, and their flow rate will therefore drop significantly.

Remember that the boost is measured in PSI, not in CFM. Of course you will need a turbo that can maintain enough flow to your engine, but just cuz you throw in a fan that has a high flow rate with no backpressure doesn't meet that it will do anything as soon as pressure is introduced.

To really find out if this will do anything, you would need to find a graph of the flow rate vs pressure differential. For instance, I am looking at the flow characteristic of an 80 x 80 computer fan that can put out 42.5 CFM @ 0 in-H20 pressure. At 0.23 in-H20, the flow has dropped to zero. There are 407 in-H20 in 1 atm (about 14.7 psi) so you can see that this particular computer fan would be worthless for trying to generate boost. Even if you were to take a huge fan with a really high flow rate, it would not be able to generate much pressure.

-D'oh!

 

For this kind of fan charger, pressure is decided by air speed hitting......on a still object. But air drawing engine hardly consider as still object.
Assume this 450cfm fan put out 0.5psi with no air flow, the pressure will drop to 0 when air flow become 450cfm. It will probably be at 0.17psi at 300cfm. Again, that's assume its max pressure is 0.5psi.

 

Thats what I think......BS!!!

 

Hey Tim I actually got to try out the Eram. It was fan put into a 3in diameter tube, about 6 inches long. The fan was put in with some kind of JB Weld material. the fan was very strong almost took off out of my hands. The electric supercharge is instructed to be used at only WOP (wide open throttle). Of course your going to fill some kind of pull with your foot to the floor. Maybe it does work for some people, but I didn't feel any kind of difference. I've felt a bigger difference with just putting in new spark plugs.

 

I saw a "eTurbo" a couple years ago at the Frankfurt Auto Show in Germany. It was new at the time, and made by Garrett (they actually called it "eTurbo"). I have not heard much about it since, but the idea was to spool it up initially with electricity, and then let the exhaust take over. Pretty cool idea, I am not sure what ever came of it though....

 

E-Ram 1 to 1.7 psi Electric Super Charger:
http://www.electricsupercharger.com/

 

Intrepid, Ya that's the thing. What I was sent didn't look like that nice one in the picture though. It was a little orange fan and the endges of the tube weren't so clean.

 

The new eRAM is unitbody structure now(one single picec no glue). I sent mine back for replacing the new structure and they charge me $50 for that.

Unlike 350, space is really a problem on my 300zx, But I hid the entire eRAM inside a Big K&N filter with 4" opening. That thing really makes some sensible power.

 

As was mentioned in an earlier post up above, DO YOU HAVE ANY IDEA HOW MUCH CURRENT DRAW WOULD BE REQUIRED TO PROVIDE POSITIVE BOOST WHEN UNDER FULL THROTTLE?! It's HUGE (thousands of amps)! MUCH MUCH MUCH more than a wimpy little 12V battery could provide.

And any ways, why would you want to convert mechanical energy to electric energy (via alternator) and then back to mechanical energy (air compression). You just went through two extra steps wasting energy into heat.

Dan

 

100 amps as mentioned on the website for 750cfm, why is this so hard for people to understand? Obviously people just don't want to believe it, probably the same people that had a hard time understanding why anyone would want to use a flat piece of plastic to hold music instead of a cassette.

 

Cool tim! glad to hear you enjoyed the eram. I'm just going to stay away from things like that. I'm just going to look into the biturbo setup . I'll be happy with those kind of gains.