Roundabout

iTrader: (8)

I saw a product half way similar to this thing a while back, but this is totally new to me. Is this another toy??

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1847561309

Roundabout

iTrader: (8)

what good would something like this do when you have a mafs?

Piranha

Of course it doesn't work. How could something costing 5 bucks equal a system that can cost a couple thousand dollars?

HALO

yes. Notice he is talking cubic feet per minute instead of psi. I hope that not to many people bid on it.

I have always wanted to see someone buy one and do a test on them, ain't gonna be me. They say they do modify performance. positive and neggative. Most only work at Wide Open Throttle. Which may give you one psi but restrict the air flow below WOT.

And then you have to figure how long that electric engine is even gonna last.

Question to whom ever knows: Is this the same one you can get in the Marine/boat shops?

You know, I should buy one to put on my Z24. That way when it screws up the engine I won't care. And I could do a real test. A little dyno time to show this crap for what it is.

PJ RX-7

My guess would be yes. There is another thread titled electric supercharger, search for that and it should answer any questions you may have about this.

GLHS

These electric turbos, would work well connected to a cold air duct and pull air into a sealed air box around the filter? It would work well while waiting at a light.

Maybe have a second cold air duct without this turbo on it, incase it wouldn't supply the needed amount of air when traveling down the road at speeds.


what about using R/C car engines to spin the fans, don't they turn about 35,000 rpms and run on 12 volts?

emagdnim

Is it just me or is that housing plastic? Can we say MELT?

banzaitoyota

Memory fade: in the early 70's Capperall or shadow produced a can-am car that used 2 rotax snowmobile engines to drive 2 huge fans to suck air from under the car to improve downforce.

The above worked.


Bilge blowers, leaf blowers, hair dryers ,cooling fans, muffin fans, converted air pumps, hamsters on speed. DO nothing to improve performance except to make your car lighter by the money you took out of your wallet to pay for it.

We have had this discussion almost as much as "I'm going to make CF parts in my moonys garage" discussion.

turboren

You do realize that this is basically a squirrel cage from a heater unit, right? I thought about that once, but, in all seriousness, this is NOT a substitute for a turbocharger/supercharger. Otherwise, no one would "waste money" on a real kit. There is no way a heater fan is going to supply enough air to make any noticeable difference in power.

Another point to consider is that the "boost" would presumably be rpm-independent, much like a basic NOS system would work. In other words, on or off. So, the engine would get the same amount of air at low speed as it would at high speed (well, not really, as at higher rpm's, the "blower" would likely be more a restriction than a booster).

Bottom line, keep your wits about you when considering things like this. A fool and his/her money...

Ren

Rxmfn7

iTrader: (4)

Hmmm... I know that this thing is pure **** pretty much, just a waste of money. But..wouldnt it put just a *little* positve pressure into the intake, at least at lower rpm?? Enough so that the engine will already have airflow as soon as the butterflies open up, the slightly pressureized air will kind of force its way though. Maybe increasing low-rpm throttle response?? Maybe even a few ( < 5 probably) extra HP. This is all down low though, after even mid-range rpm this thing would just be a restriction in our already crappy intake, but do you think what I said would be true for at least low-rpms??

*I'm not saying that this product is good in any way, shape or form, no-one buy it*

Piranha

well, if you are trying to speed up at very low rpms, you might as well just downshift. It wouldn't help at anything other than WOT, if it could, because you have throttle plates blocking off the airflow.

Rxmfn7

iTrader: (4)

Ahh yes....wasnt thinking about the throttle plates. But lets say you floor it in 1st gear at like 1500rpm. In my N/A anyway, it barely moves until it hits around 3k rpm. Would this affect that situation at all?

gold87na

ha! i know someone who bought one of them.. hehehehe i installed it into his ugly old azz jetta. This one at least looks better then the one i installed which after looking inside i found 3 electric (pc powersupply style) 12v fans.. It did as much as putting old half-dead plugs and wires in.. I should make them things and sell them on e-slay..



I really think you would get more airflow from a 120v AC leaf blower running off a 12vdc - 120vac inverter..

I'm just throwing around a handfull of pennies though..

gold87na

1 other thing. I have forgotten the algorithm to figure out how meny cfm an engine moves.. i'm guessing a 13B at say 7000rpms can push at a min 1000cfm but please correct me..

Terrh

iTrader: (7)

wow 600CFM!!! holy **** thats alot of air.

until you consider that your engine pumps 1.3l of air per rev.

that means that at 600RPM that MIGHT just barely supply enough air for your engine to run.

and at 7000RPM it won't be anywhere near close. You'd need about 30 of these to see boost.

RIP OFF!

the algorithim is really simple.

displacementxrevs = airflow per minute@WOT

GLHS

displacement as in cc's or cubic inches or litres?

pip

Anyone looking to buy one of these might as well buy an inverter and stick a hair dryer in theri intake, as was said b4, A fool and his money...

gold87na

heres a really dumb question (just so i can complete this algorithm). How meny ci's is a 1.3L? i'v seen cc's but never ci's... so then CI x 7000rpms = CF/M right? because 1.3L x 7000rpms = 9100L/M that dont really help.. regardless this thing might work on a 100cc dirtbike

gold87na

13B= 80ci / 12inches = 6.67 Cubic Feet. Then 6.67cf * 7000rpms = 46690 CFM! Can this be right?

NZConvertible

No, completely wrong! There aren’t 12 inches in a cubic foot! There are 12³ = 1728ci.
A 13B with 100% volumetric efficiency (impossible) sweeps 79.8ci per revolution. At 7000rpm, that’s 79.8 x 7000 = 558,733ci per minute, or 323cfm. In reality it’d be lucky to get 280-290cfm.

Something that never gets mentioned in the ads for all these BS products is that it takes two numbers to describe the flow of a fan; a volume and the outlet pressure at that volume. That fan will blow 600cfm with nothing connected to it, but with the significant restriction of an engine in front of it, it would only be able to move a tiny fraction of that flow rate.

gold87na

thank you nzconvertible. i was really wanting to know the true cfm... i'm also brewing up a thought on a not so turbo turbo.. but my idea may very well work.. just figuring out how to connect it and keep it perfectly balanced. I know a turbo can spool up to 100k+ rpms. I also know it can create a good ammount of resistance spinning something that fast and gainning pressure.. my thought does include a electric motor, but not running on 12vdc. I would have to use a inverter/active regulator to make it work. My idea i will get to work even if i have to include a 486 in a storage bin to control it.. thats a baby considering what i'm building...

rx350

Why it wont work:

It seems you are talking about a basic fan type setup for a turbo charger....intresting....however...without an completley seperate and airtight chamber for both input air and output air, Id imagine the engines vacuum would do a marvelous job of sucking air right past the fan blades, and would act more as a restriction than an aid to airflow.

in short....its a hokey idea....whoever thought of it should be slapped....whoever buys one...should be slapped twice....

there are electric turbos....but dont expect to pay less than $1200.

12V motors wont do sh*t, even spinning at 35000 rpm...they just dont have the power (VxA) to back it up...simple math really...the amount of power that is required to pressurize the intake manifold would probably be in the neighborhood of 3-5hp

5hpx746= about 4000 watts.....
4000 watts at 12 v = 4000/12=333Amps.
....

show me an RC car motor that can run at 300 amps continuous..and Ill show u an electric turbocharger for 10 bucks

NZConvertible

Read this article, it explains why none of these things will ever work.

BTW, as rx350 hinted, electric turbos have been developed. They're basically a real centrifugal supercharger with an electric motor on the back. It requires a serious upgrade to the vehicles electrical system, but in the end they’re a waste of time because you’re driving the alternator of the crank, losing some energy via the inefficient alternator, then running the electric motor. Obviously there is much less loss simply running it off the crank!

gold87na

I'm talking about getting a real actual turbo and getting small powerful ac motor to spin it.. almost like a dremel tool motor but more powerful and a little faster.. Just a thought. I will turbo it either way, normal or electric. What company(s) makes that electric turbo?

gold87na

nzconvertable your artical explains "14,500 watts divided by 13.8 volts = 1050 amps" now try 14,500w / (2 x 120vac) = 60.42a . Now under normal driving your alternator will get warm because of the inverters, but using capacitors (like car audio) i could get that . I have 5 14Vdc 1 fared caps sitting on a bench. I also have 2 (yes 2) 10,000watt voltage inverters. am i getting closer?