has anyone measured the speed of the air entering the inlet of a car at full throat?
Speed is an relevant factor, but mass is more important.. More mass means you can make more power. Speed is simply related the area of the intake pipework, although you do get intake pulse shockwaves which are again related but not the same thing.
let me tell you of an easy way of testing this fan..
you know the sound you get from your air filter when you floor it? thats air rushing through the filter..........now disconnect your filter and place the fan on the back of it..... run the fan........try and hear the same sound.
No comparisons could be drawn from that!
you wont, and its simple why........ vacum created by the inlet on a petrol car is huge....
Not really. You cannot have less than no pressure, infact there is no such thing as a negative pressure! So technically speaking we are all under about 1 bar pressure by the atmosphere above us. The 'vacuum' in an inlet manifold is only a vacuum relative to atmospheric pressure, but under all conditions does have a pressure of its own, just less than atmospheric.
enough to help the brakes work better
Only by means of a servo...
.....to overcome this vacum and create possotive pressure manufacturers utilise thousands of KJoules of energy turning a turbine at 150,000rpm
Many turbos wont spin this fast, and would in most cases be way beyond that of the of the usable service range. In fact a T25 is most efficent between 90-130 thousand RPM.
(usualy one thats twice the size of the throttle body inlet) even at full throttle it takes a good 3-4 seconds for a turbo to spool to full pressure......then you will have arround 3-9 psi on most applications.
Turbos are sized by the flow requirements not throttle body size.
do you realy think that a small fan inside the air inlet pipe will exert the same ammount of energy as a turbocharger?? or even come close?
This is very true.
all this will do is ruin your battery,
30watt load - not likely
cost you money and slow the incoming air down in the inlet system..
Correct!
Come on guys, these have neither been proved nor disproved that they work.
Here we have someone just selling items, and doing so at a reduced rate, and all you lot can do is take the ####.
Sort it out fellas, this isn't the MSC way!!!
Its also not the MSC way to try and endorse or have stuff sold that is in effect nonsense. (I will happily stick one of these on a car and measure intake manifold pressures to show as such) Infact I DID try about 5 years ago some powerfull 40amp fans that made absoutely no noticable difference at all...