| Lll_J |
The electrical draw for something like that would be huge for it to make any boost. Ive talked about these on other forums, turns out most people think it is a scam as well.
A quote from a guy who did a little research on a similar product.
quote:
What they are trying to sell as "Electric Turbochargers" on Ebay are actually Bilge vents for boats. Bathroom fans. They look cool and high tech but they only flow about 45 CFM and CANNOT create "Boost".They sell at boating supply stores for 15 to 20 dollars.
There is one legitimate "Electric Supercharger" out there though. Their unit sells for around 300 dollars and can actually make a few PSI of boost. Do not be sucked in by the "free horsepower" crap because that's all it is... Crap...
Jordan |
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| 4G63PWR |
| Well these guys are selling this for about $2000USD, and say it can create 20psi of boost. They have dyno graphs their as well. |
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| SplineZ |
The one on the site looks to be quite a bit higher quality than those stupid fans they sell on ebay.. Those things do not create the pressure needed.
But there are problems with this too... Max useage is 15sec.. and the current draw/recharge would be insane
quote from another site:
quote:
I'm a bit dubious about their numbers. The CFM at pressure is good for boost, but the electrical requirements are quite high. 1,250 amps is the draw at boost. This would result in very high temperatures. I'd also worry about the life of such a battery. Also, the recharge rates are very optimistic. According to the Odyssey website (the battery recommended) it takes 3 times the battery's output amperage to get it 100% charged in 30 minutes. Given that you'd need at least 4 650 amp batteries to fire this system, you are talking VERY long charge times from a 200 amp alternator.
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quote:
The concept of this supercharger certainly seems sound, but I doubt the claim that the batteries can be recharged in such a short period of time.
Lets say the motors draw 1250 amperes (at 24 volts) for 15 seconds. The energy delivered to the motors is 450,000 watt-seconds. An 85-ampere alternator could supply about 1020 watts (at 12 volts). It would take 441 seconds (about 7 1/2 minutes) for the the alternator to resupply the 450,000 wat-sec of energy to the batteries (without exceeding the current rating of the alternator). If you had a 200 ampere alternator that could supply about 2400 watts, the recharge time drops to 187 sec (about 3 minutes).
The problems I see are:
1) With such a simple charging circuit, you cannot assume the alternator will be supplying its RATED output power continuously to the discharged batteries. More than likely, the charging current into the batteries will drop off substantially as they recharge thus extending the charging time. This might be overcome by using a constant-current charging scheme, but this opens up another can of worms (i.e., the alternator output voltage could be controlled to maintain a specific charging current, but this would probably require a dedicated alternator since its output voltage would likely not be suitable for the rest of the car).
2) The battery website makes no claim that the batteries can be recharged at such a high current. The Odyssey webside specifies the battery cycle life as "400 at 100% DOD and 14.7V charge for 16 to 24 hours". I wonder how many cycles the batteries can survive when you charge them in only 3 minutes!
Thread: http://www.fiero.nl/forum/Forum2/HTML/045035.html
I wouldnt even considder it.. I'd rather get Nitrous or a turbo :)
James Z |
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| ChromeDragon |
The TKT electric supercharger is legit, although you will need a higher output alternator(or another one) to sufficiently power it. The great thing about the electric unit from TKT is that you can mount it pretty much anywhere. It can be mounted down low in the front end right beside a intercooler so that it also recieves a supply of air to help cool it.
Chromey |
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| MightyMidget |
I think it is BS too!!!!!
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| VerbotenZ34 |
I've seen that before. I think it wouldn't be as efficient or useful as a traditional FI setup, but it has its appealing features (remote mounting, no parasitic loss, etc).
I've always had the crazy idea to try another setup though: If you need on-demand boost, why not rig a compressed air cylinder to your engine, to provide the higher pressure air charge? It'd be the same effect as traditional FI, but on demand and with similar advantages to the electric FI.
.......................Or am I just talking out of my ass? :p
Verboten |
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| fiero_TyPe_s |
| Why would'nt you just buy a normal supercharger?It's probally lighter than one with all those electrical motors,plus they give you boost all the time not just when you push a button.If you wanted instant power for a short period of time by nitro(its way way cheaper)and i can't see it being much worst than a 20 psi in a Non-Built Engine.There Are even chargers like My Bros that have clutches to Disengage them so they have to be on all the time.Plus the Thing Costs a Mint.IMO |
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| 4G63PWR |
quote:
Originally posted by SplineZ
But there are problems with this too... Max useage is 15sec
Wow, would that ever mess with the ECU. |
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