Uh. What do you think the intake impeller is on the compressor side? It's totally free flowing. There's no valve or anything to make it "sealed."

 

yeah, fans create a zone of high pressure on the exhaust side, weather its a turbo or the fan on your desk.

 

right, but it's moving with such force that air can actually be compressed because very little to none can "escape" elsewhere except in the direction the compressor is moving it. you guys are seriously missing the point.

if the system is not sealed at the point of being compressed, you will lose boost. the air has to be "enclosed" in order for it to be compressed. if you take a fan, and just crank it up even at extremely high rpms, but don't have it enclosed, all you're doing is blowing air around. you're not compressing anything.

Just like the air/fuel mix in our combustion chambers must be "enclosed" during the compression stroke, the same goes with air that is compressed from a turbo charger. this is basic physics, i can't even believe I'm having to explain this in this discussion...

and if you're still having a hard time understanding this concept, take a drill and drill a nice hole into your intake piping before it goes into the throttle body and intake manifold. see how much boost you lose then.

 

yeah, want to know how much "high pressure"? a fan small enough to fit into your intake can create a temporary .1 psi area of pressure on the exhaust side.

 

No. You are misunderstanding the English language.

The whole system is open. Not closed.

"enclosed" doesn't mean "close enough to be enclosed so you might as well use quotes to pretend it's close"

You think it's closed because air doesn't leak out backwards through the compressor inlet. That's a result of the higher pressure being caused from the compressor output. It's a hollow frickin tube. The only thing preventing boost loss is the fact the turbo is still running and continues to push more air.

If I take a fan and just crank it up? Hello? That's what the impeller IS on the compressor side. It sucks in air at a very high rate. You go from low velocity, low pressure air to high velocity, high pressure air.

It's not exactly basic physics, but it's basic fluid dynamics which you don't seem to have a grasp on.

 

electric motors will benefit cars' performance oneday,
(well, it already has...)
but not in a stupid, simple way like that.

 

I think what's happening here is a misunderstanding of what everyone is trying to say.

What I'm trying to say is that even if you take some fan, and fit it into your intake pipe, and get it to move even as much as 500cfm, it's not going to benefit much, nor create compressed air, or boost. You may create a negative side of air pressure enough to get air flowing more quickly, but you won't actually compress air, since the fan simply isn't powerful enough to do so.

I mean if you want to argue and call a turbo a big "fan" then so be it, but that's not what I'm referring to. I'm talking about some little electric fan you buy on ebay, or some leaf blower you strap to the inside of your car.

 

If you look at this particular ebay auction it's basically a turbocharger except that instead of a turbine that uses exhaust gas to spin the compressor fan it uses a DC motor. Will the alternator and/or battery supply enough current to spin the compressor at speeds needed? That remains to be seen.

 

1 liter = 0.0353 ft^3

So 2.0 liters = 0.0706 ft^3
and 2.2 liters = 0.0777 ft^3

Because the S has a 4-stroke engine, it is only sucking every other revolution.

Given the above we have a rough idea of air intake volumn:

Liter........ft^3.......CFM @ 5000 rpm........CFM @8000 rpm.......CFM @9000 rpm
2.0........0.0706............176.5.................................................. ...........317.7
2.2........0.0777............194.2...........................310.64


A 500 cfm leaf blower may give one hell of a boost.

 

sure... IF you can prevent the extra CFM being introduced from blowing anywhere other than into the intake manifold.

on top of that, that's assuming that it can maintain 500cfm at the ITB once there is resistance to that kind of air flow being introduced.



You know, we can go round and round with numbers and theories all day.

Bottom line is this:

A. if this actually worked, then there'd be a hell of a lot of people running around with this cheap easy to do mod.

B. if you're so certain that the theory is sound and you disagree with what i'm saying, then buy one of these ebay units, or turbonaters, etc, dyno before and after, and prove us all wrong.