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Actually, some of the first ones on the scene used bilge pump motors out of boats.

The latest ones use modified brushless DC motors from radio-controlled aircraft. Some of these babies spin some rediculos RPM...

If you set them up so one blows through the other, you will get 4.2 psi. Or if you have a death wish use three and get 8.4 psi

i'll sell you two PC fans - and install them - for $550 if you like.

then you can have 2.1psi WITH THE ENGINE OFF and get a reliable product that doesn't void any manufacturer's warranties (except the PC fans of course!)

no guarantees when you turn the engine ON though...

Ive heard they max out at 2.1 psi and are good for towing not a real racey thing ....yeah they are some sort of electric fan but whos to say with a bit of developement it could take off ....
hows this for techo ive water cooled my computer and have a 120y heatercore with
twinn 120mm thermos hmmm.....um....i was bored OK ..........

Which is the one that is basically just a computer fan that you put into your intake?
Matty

i could be refering to the turbo zeet electronic turbo charger it was a while ago i read the artical

They must of done something wrong then

i read on another forum that some one tested this item and the test car actualy lost fower dew to air flow restrictions

From memory one of the members of this site bought one and found absolutely no gain at all. His car may have been slightly quicker due to his wallet being lighter giving the car a marginal improvement in it's power to weight ratio but I could be wrong.
Matty