Talked to death about it.

[Ku-sama]

Newegg.com - 1ST PC CORP. PFB1212UHE-F00 120mm Case Fan - Case Fans

something like this hooked into a controller and run on the TB of the 5S.


252CFM, any HP gain? even 1 measly HP or FT/LB?

[traintech86]

i at 1 point was insanely considering puting that in a pc case. as for putting it on your car, i am not to sure it will be able to put up with the elements. GL!

[MR JAS]

oh my god please tell me your not stupid enough to think you can get free horse power from a fan

ok quick lesson
electric fans are good for volume not pressure
if you want an electric supercharger setup you need a positive displacement pump
lets look at an engine as if it was an air pump when you add a supercharger that robs 50kw of energy it would be adding around 30kw of air energy to the engine at best (i.e. makes engine run better as its forcing air through) now as you can imagine this would be loosing power as its using 50kw to gain 30kw
however when you factor in fuel ratios the 50kw of energy used by the supercharger its putting 30kw of air back into the engine but also allowing an extra 100kw of fuel to be utilized hence it gains hence giving a net gain of 80kw

while not being as specific as normal energy gain needs (such as needing a specific amount of energy to lift 1kg by 1m) due to varying adiabatic conditions compressing a certain volume of air to a specific pressure always requires a relatively similar amount of energy depending on the efficiency of the system

what that basically means is if a normal supercharger requires 50 kw of energy to run you would need relatively close to the same energy input into your fan to get the same gains so a 10 watt i.e. 0.01 kw fan would have little effect

to prove this put a vacuum cleaner which is normally around 1.5kw onto blow mode and put your hand over the pipe and you will be able to stop air coming out now try the same with a turbo or supercharger and there is no way of doing it this proves the positive displacement pump concept (electric fans cant build pressure)

in theory you can run a supercharger electrically and by having ideal speeds it would run much more efficiently but a 50kw electric motor weighs as much as a mk1

as far as putting this in your intake i would fairly say you would lose power due to intake restriction and turbulence caused by fan spinning at a constant speed in an inconstant air stream also with vibration etc i would suspect it would quickly lose blades which would have buttsecks with your valves

holy crap that was a long rant i better have passed my thermofluids paper just for remembering a word like adiabatic

[baktasht]

you're joking right? it's a dam PC fan.

[Sh0ty]

Go ahead, just try it.

[GINA2MR2]

dude its your car screw the haters try it.
i work at a yard and VW use a air pump in the bottom of their intake boxes, try one of those. i'll sell you one for basically shipping cost.

[como]

Try it if you want, but read post 2.... computer fans don't generate pressure, just lots of flow. The moment you put backpressure on them they lose huge amounts of their flow.

What you need to look into is centrifugal blowers

[MR JAS]

Originally Posted by GINA2MR2

dude its your car screw the haters try it.
i work at a yard and VW use a air pump in the bottom of their intake boxes, try one of those. i'll sell you one for basically shipping cost.

haters and realists are different things entirely

[Oteck]

Originally Posted by baktasht

you're joking right? it's a dam PC fan.

It's a sign that some ppl shouldn't be working on cars

[como]

Somebody told me I shouldn't be working on a car because I dont like glossy paint jobs.

I started dousing them in kerosene, then they left me alone.

Don't hate.

[MR JAS]

Originally Posted by como

Somebody told me I shouldn't be working on a car because I dont like glossy paint jobs.

I started dousing them in kerosene, then they left me alone.

Don't hate.

what is wrong with you people

PROVING WITH PHYSICS THAT HIS IDEA WONT WORK ISNT HATING
IF HE WENT AHEAD AND DID IT (im sure you wont)AND I CALLED HIM A MORON ITS NOT HATING EITHER ITS CALLING A MORON A MORON

[como]

MR Jas: You had the best put together, well thought out answer anyone of reason could hope to see as a reply to his original post.

[328FTW]

This is retarded......


use this instead


Huge hp gains honest

[scottohno]

^^ uh whered the pic go?

[scottohno]

my best friends brother had a 03 focus with everything done to it but Stupid Juice and forced induction. he put a fan for a bilge blower on a boat in his intake, dynoed it, took it off, did another pull, NO DIFFERENCE. at all. even he knew MR JAS was right, but he did it to disprove the theory. this thread reminds me of riced out hondas and their 5hp gains from every sticker they can get on the damn thing.

[traintech86]

well i could see it possibly putting more air through the rad but really you'll only get as much heat out as the rad would allow right?