Reply With QuoteI had a hiclone. Didn't know till I blew a head gasket and found pieces in the inlet.
Wizard
First, I hope the image has appeared, my first photoon the forum.
Okay, I got this crazy idea of adding a 12v computer fan in the airbox after the air filter. This was to mainly disprove Hiclones. From all that I understand about engines in the most simplest terms is more free flowing air in and more air exiting an engine should have some performance gain.
Also if this did not work ten it would then place a question mark over the effectiveness of "free flowing" air cleaners.
As mentioned on another thread I wired it up to a cigarette lighter plug, so I could have it on or off as I wished during my testing. This is vehicle is driven mainly by my wife, and she had no idea when thefan was turned on or off so driving influence was eliminated. The vehicle is used mostly for shorter runs of 30kms with a mix of highway and town driving. Once a week it would have a 2hr run on freeway to Melbourne with some city driving thrown in for good measure. The vehicle is a 2002 TD5 with a steel bullbar and winch and 245 75 16 tyres. It has done a total of 10,000kms with the fan on and 5000kms with the fan turned off.
After calculating out fuel economy I am consistently getting 1l/100km better fuel economy with the fan on than with it off.
I really can not seem to pick any noticeable performance gain but I do think I have less turbo lag with the fan on than when it is off.
I really did not expect to see / feel any changes but their has been a small fuel economy gain out of no expense except for a bit of wiring and a 12v plug.
If I can think of a way of sealing it up I am considering adding another 12v fan where the egr valve sits.
Last edited by p38arover; 25th October 2010 at 03:38 PM. Reason: Fix picture link
TopicToaster
I had a hiclone. Didn't know till I blew a head gasket and found pieces in the inlet.
Wizard
Could the reduced economy when the fan is off be due to the fan blocking the air flow?
How does having the fan on compare to not having the fan present at all?
Super Moderator
Wow a supercharger!
You won't find me on: faceplant; Scipe; Infragam; LumpedIn; ShapCnat or Twitting. I'm just not that interesting.
TopicToaster
Search ebay for elec supercharger or turbo charger. You get for your money a whipper snipper motor with a fan on it.
Master
Ah nope, not going to reply to this. Too scientific...
YarnMaster
Im going to make this simple to understand......
No reference to any specific engine but i will use the humble 350 Holley as an example.
The 350 means it can supply the engine with 350cu.ft of air per minute
A PC 12v fan, and being generous here, of 120mm diameter is lucky to pump out 0.5cu.ft per minute.....
It also sits in the path of the incoming air which now has a reduced amount of open space with which to flow....
You do the math people.....
FFS.....
i cant believe people contemplate this as a viable option......
Super Moderator
who was it who said "a fool and his money are easy parted"?Originally Posted by LOVEMYRANGIE
You won't find me on: faceplant; Scipe; Infragam; LumpedIn; ShapCnat or Twitting. I'm just not that interesting.
TopicToaster
another simple comparison
a turbo or supercharger will consume a couple of kilo Watts of power to pump air into an engine at a flow rate similar to as per above and develope 5-20 psi.
a computer fan would comsume a couple of Watts and be lucky to raise the air pressure by more than a 1 or 2 psi at zero cfm airflow.
As the man said you do the maths
Wizard
I will have to have a look at this.
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