Ghetto "Supercharger" idea...

[HarriBanjo]

Right, this is probably stupid but I'm going to ask the question anyway...

I've always been a bit of a PC enthusiast, and because of this I once brought a very powerful 12V fan designed for servers (you can probably see where I'm going with this :rasp: )

If I were to somehow attach this to the front of my induction kit I reckon seeing as it pushes ~190cfm (cubic feet/minute) it'd increase the airflow, especially at lower speeds.
This would increase the volume of air going into the engine which is generally considered a good thing

I've also thought that there are loads of problems such as the engine running lean, keeping the fan from being damaged by the great British weather, etc.

My thoughts today, as I sit here with the fan on the desk infront of me, are:
"Well, if we assume the air going into the engine at >70mph is going bloody fast (faster than the air coming out of the fan on full whack) then the engine shouldn't run lean with the fan on at lower speeds because all the fan is doing is simulating the car moving at high speed, right?"

To put some numbers to my idea (all complete guesses btw, just to give some perspective to what I'm getting at :rasp: ):
Air coming into IK at 20mph (naturally aspirated): ~50cfm
Air coming into IK at 80mph (naturally aspirated): ~200cfm
Air coming into IK at 20mph (Ghetto fan): up to ~190cfm

So, before I'm shouted at for being such a chav - this is just an idea I had given the objects surrounding me at this moment.
Obviously if I had the money for a 172/182 + 'charger I would, but all I've got is my baby 1.2 8v and a big fan

 

[Nick_P]

Hang on.



eBay wot.

 

[Moz168]

Erm.


Just that.

 

[aucky]

+10BHP




....Lol :lolup:

 

[Ben.Block]

Give it a go, let us know how you get on.

 

[Chesh]

http://cgi.ebay.co.uk/New-Electric-...arts_Vehicles_CarParts_SM?hash=item23063f9dc2

Lol i cant believe this

 

[matt|H]

In before the lock

No harm in trying buy you'll be very disapointed lol.

 

[Sheilas’ Wheels]

Why not just bolt a hair dryer set on cold?

 

[.GAZ.]

Oh my.

Better just adding an old skool CS sticker for 10 bhp!

 

[Christopher]

 

[ditz]

to be fair this isn't your average ebay link and will this work thread... least there has been a little bit of thought gone in to it and some numbers etc

it wont work though.. turbos spin at 100's of rpm's for a reason.. you would never produce the pressure with an electric motor unless it was seriously geared which working on the"if it worked it would have been done by now" assumption its not going to work

 

[marinemackay2003]

''I've always been a bit of a PC enthusiast''

keep to what you know tbh

have a read up on ebay they are all over the place

 

[_WILL_]

How are people allowed to sell such s**t on ebay??

I can see where you are coming from, but it won't work, if anything sticking the fan in there is have the opposite effect by restricting air flow, at higher flow rates.

 

[Scrooge]

Oh dear. Why don't you feed a hosepipe from inside the car to the air filter then blow down it?

 

[HarriBanjo]

http://cgi.ebay.co.uk/New-Electric-...arts_Vehicles_CarParts_SM?hash=item23063f9dc2

Lol i cant believe this

^ Wow... just... wow! Who would actually buy something like that expecting it to work as advertised?!

No harm in trying buy you'll be very disapointed lol.

^ Lol, obviously I'm thinking "no harm in trying", but I'm really not expecting enough to be disappointed.

it wont work though.. turbos spin at 100's of rpm's for a reason.. you would never produce the pressure with an electric motor unless it was seriously geared which working on the"if it worked it would have been done by now" assumption its not going to work

^ Yeah, very fair points there. This is what I thought the general consensus would be. Just thought I'd pose the question as the fan sitting infront of me chucks out a fair amount of air, although obviously nowhere near as much as a turbo or charger would.

''I've always been a bit of a PC enthusiast''

keep to what you know tbh

^ Ouch! Someone's not getting any free tech support from me when your PC/TV/console breaks!!

I can see where you are coming from, but it won't work, if anything sticking the fan in there is have the opposite effect by restricting air flow, at higher flow rates.

^ That's something I'd wondered about too, not knowing the actual numbers and having to work completely on assumed values loses me credibility here as I've no idea at what speed it would stop helping and start hindering the air flow (assuming that it helps at all in the first place!)

Oh dear. Why don't you feed a hosepipe from inside the car to the air filter then blow down it?

^ If I could blow hard enough to give decent boost I'd give it a go just to see what happens :rasp:

Thanks for the fast replies everyone (even those that were slating my curiosity) I'm off for the night now.
I'm subscribed to the thread so if there are any more responses I'll probably be back on tomorrow.

 

[jamesp24]

Hahaha April fools very funny.............................Oh wait

 

[littleC18]

my mate has had lots of 2cv's and did this. basically the rad fan spins faster the faster the engine revs. so he somehow basically made a supercharge forcing air into the engine. he then drilled out the carb and put a straight through exhaust on it. considering they cam out the factory over 20 years ago with 30bhp he had it RR'd at 62. quite impressive if you ask me. its got theory behind but whether it'd work on a more modern car is a whole different question

 

[jamesp24]

Basically a 12v fan cant produce that sort of pressure so no it wont work.

 

[TimR26]

Add an ecotek valve and I reckon you could be onto something with this idea.

 

[Joeh]

the only question is, where will you fit youre intercooler?

 

[Reyes]

Epic thread.

 

[swordjo]

my mate has had lots of 2cv's and did this. basically the rad fan spins faster the faster the engine revs. so he somehow basically made a supercharge forcing air into the engine. he then drilled out the carb and put a straight through exhaust on it. considering they cam out the factory over 20 years ago with 30bhp he had it RR'd at 62. quite impressive if you ask me. its got theory behind but whether it'd work on a more modern car is a whole different question

What was his downhill 0-60 time?

 

[Russ_16v]

my mate has had lots of 2cv's and did this. basically the rad fan spins faster the faster the engine revs. so he somehow basically made a supercharge forcing air into the engine. he then drilled out the carb and put a straight through exhaust on it. considering they cam out the factory over 20 years ago with 30bhp he had it RR'd at 62. quite impressive if you ask me. its got theory behind but whether it'd work on a more modern car is a whole different question

So your saying he got a 100% power increase from a straight through exhaust, a drilled out carb, and a PC fan :S

Im in the wrong game

 

[Louism]

to be fair this isn't your average ebay link and will this work thread... least there has been a little bit of thought gone in to it and some numbers etc

it wont work though.. turbos spin at 100's of rpm's for a reason.. you would never produce the pressure with an electric motor unless it was seriously geared which working on the"if it worked it would have been done by now" assumption its not going to work

This, however they are developing totally electric turbos to stop any turbo lag.

Good on you son for thinking outside of the box, let us know how you get on.

 

[stan*]

@5000rpm your engine "takes" 210cfm, so its likely to cause more of a restriction.

 

[Ben_Stevo172]

rofl at this thread!

 

[D2501]

Lol - brilliant outside of the box thinking. I'm not technically minded so I have no idea if it will work, but it sounds unlikely.

Why stop there though? If you combine more of your computer with your car, you could end up with KIT

 

[Tom]

Do a search for ram air, it used to be the discussion to have on CS

 

[ClaneO]

wow......just......wow!

 

[ilovewilly]

A friend of mine did this to his nova in circa 2004 at a simular time when we made some wide arches from stips of fibreglass and made bad boy bonnets. It got left in that period.

Concidered airhorns?

 

[frediiii]

if you want to blow your car electricly, just spend 1700 usd on a TKT electric supercharger (utilizes a roots-compressor powered by 3 brushless RC motors who are capable of delivering a total of 8hp output, which is good for >40 psi.

downside: it's powered by seperate batteries. three clustered 12V batteries will last for <20 seconds on full boost. then they have to be recharged either over night with a tickle charger or with a 200+Amp alternator in-car in a couple of minutes

so it's proven to work. but you see you have to put some effort in, to make it work. so you can determine the success rate of "just flanging a axial PC fan to the intake" (which is of course capable of moving air. but not even slightly to build up pressure of any kind.)

http://www.turbomagazine.com/tech/0406tur_knight_turbo_electric_supercharger/index.html

 

[Gardus]

I remember some experiment on japan cars with an electric motor that helped the turbo to start spinning, something to reduce turbo lag and throttle response. I guess it wasn't worth it.

 

[swordjo]

Did ProDrive not make an great anti lag system which was never put into full production too?

 

[frediiii]

yeah with a bushless motor sitting between exhaust and compression side of the turbo. while turbo spinning at high revvs the motor charged a battery and in low revvs the motor accelerated the turbo for anti-lag and low-revv power. don't know if it ever went into production.

 

[Chesh]

if you want to blow your car electricly, just spend 1700 usd on a TKT electric supercharger (utilizes a roots-compressor powered by 3 brushless RC motors who are capable of delivering a total of 8hp output, which is good for >40 psi.

downside: it's powered by seperate batteries. three clustered 12V batteries will last for <20 seconds on full boost. then they have to be recharged either over night with a tickle charger or with a 200+Amp alternator in-car in a couple of minutes

so it's proven to work. but you see you have to put some effort in, to make it work. so you can determine the success rate of "just flanging a axial PC fan to the intake" (which is of course capable of moving air. but not even slightly to build up pressure of any kind.)

Lol tickle

 

[frediiii]

Lol tickle

:rasp: foreign language, mate... but you're right. it's a funny typo

 

[ben_r1]

There was an old skool citroen that had an electric supercharger, read it up in Redline mag a few months back, although as stated the idea never caught on due to excessive weight/battery issues.

 

[Chrisjk]

My younger brother did this on his moped a couple of years back, it worked for a bit but then his exhaust caught fire...