Putting a fan on top of air intake?

[InFlames]

Test drove my friend's Getz the other day, he had a fan attached to the inside of his air filter forcing air into his engine, man does his car fly!! 1.6L 16V engine auto car that burns rubber when u step on the gas... anyone know if any such mods are available for bmws?

 

[Tanzy]

Re: Putting a fan on top of air intake?

Yes, we call it a supercharger or turbocharger.
No point playing with electric fan. Use the real thing

 

[rex7_vtec]

Re: Putting a fan on top of air intake?

Oei Tanzy!! Wah seh... Your reply sibeh cocky leh!!! Hahahaha

Anyway I think this fan is called Cyclone or something like that...

 

[jaskin]

Re: Putting a fan on top of air intake?

I can't picture a fan on top of the intake. Any pics of the actual unit?

 

[Tanzy]

Re: Putting a fan on top of air intake?

wrx7 with vtec,

Better than asking him to use aeroplane turbines! I think he's not referring to cyclone or those surbos. He's talking about electric bilge fans usually found in leaf blowers. They give about 0.5-2 psi of boost. Can be installed at ADM in Bukit Batok. About $800 or so. Small gains are observed. Becareful of a model out there that's really big and can boost to 2 psi but draws more power than the alternator can supply. Flatten the battery in less than a day!

 

[rex7_vtec]

Re: Putting a fan on top of air intake?

wrx7 with vtec,

Better than asking him to use aeroplane turbines! I think he's not referring to cyclone or those surbos. He's talking about electric bilge fans usually found in leaf blowers. They give about 0.5-2 psi of boost. Can be installed at ADM in Bukit Batok. About $800 or so. Small gains are observed. Becareful of a model out there that's really big and can boost to 2 psi but draws more power than the alternator can supply. Flatten the battery in less than a day!

Is there a product like dat???

 

[Tanzy]

Re: Putting a fan on top of air intake?

Is there a product like dat???

Ya. Check out magazines like Hot Stuff. A few in the market. ADM is the pioneer with this device. It comes with a MAF cheat box to prevent engine from running lean. Ultimately, these things produce extremely low boost so expectation shouldn't be too high. If the engine displacement is large or revs hard, this blower thing might even become a extra resistance to air flow. If one is lucky, the difference will be something like driving in colder weather.

 

[rex7_vtec]

Re: Putting a fan on top of air intake?

Ya. Check out magazines like Hot Stuff. A few in the market. ADM is the pioneer with this device. It comes with a MAF cheat box to prevent engine from running lean. Ultimately, these things produce extremely low boost so expectation shouldn't be too high. If the engine displacement is large or revs hard, this blower thing might even become a extra resistance to air flow. If one is lucky, the difference will be something like driving in colder weather.

Very interesting item....

 

[Wayansurfer]

Re: Putting a fan on top of air intake?

YEah its the ADM supercharger..its a small unit that has a small turbine( a small fan to me ) that forces more air into the combustion chamber. IT can be retrofitted into any car. Some fitted 2 units of those..it will be fitted after the air filter....estimated cost $500-$600.

 

[Wayansurfer]

Re: Putting a fan on top of air intake?

Here it is.......small unit tho

 

[piggyboyz]

Re: Putting a fan on top of air intake?

I think what he mentioned is putting a small fan inside the Airbox to provide cool and ready air when the car is stationary...

It's a pretty simple DIY mod. Just go to Sim Lim square and get a computer fan and connect up the power and volia, u got a fan running liao...

Last time there is a 320i Green colour one got it liao, apparently the result is quite good, can keep up with a silver 2.2L 320i haha !!! i cannot say the name, else he will scold me for sabo again hahaha !!!!

But seriously, the effect is quite good especially for the weather lately. The fan will get rid of the heat soak in the airbox during the start stop traffic and provide the initial air required when moving off... But what u need to have another source of intake and then pass thru this fan to provide the "cyclone" effect to make the fan more effective....



Have fun....

 

[Whisky_Tango]

Re: Putting a fan on top of air intake?

Hahaha... Bro.... No worries lah...

This cheapo(S$25) fan thing is ONLY good for low end because of the limited air flowrate. So the gist of it, is to pump air into an enclosed air box or DIY heatshield. Pressurised the air around the filter.
Logically, high pressure side will find its way to low pressure side, thus the suction thru the filter is easier.

It would be better if you can control the fan speed according to the engine load or rpm. Lower rpm slow fan speed and higher rpm max fan speed.

The ADM has a module that has the controls and if you ask me this ADM fan is powerful, like some industrial ventilation fan with those flexible ducting into tunnel. It might be sufficient for high end IMO. There is a demo kit at Jeep Chee, duno if its still around.

Cheers!

Oh BTW... the S$25 fan has been given to someone here. Think lying somewhere in his storeroom.

 

[Shaun]

Re: Putting a fan on top of air intake?

Computer fans are very different from bilge blowers. The latter is violent by comparison.

 

[Whisky_Tango]

Re: Putting a fan on top of air intake?

Computer fans are very different from bilge blowers. The latter is violent by comparison.

Bro, fyi the 25bucks fan is not a computer fan. Its a mini blower and has a snail shape design. hehehehe

 

[Tanzy]

Re: Putting a fan on top of air intake?

But the engine is constantly sucking in air whilst it is running even when stationary. Outside air is entering the box, how will heat soak affect it if it is drawing air from the stock box or proper heat shield?

 

[piggyboyz]

Re: Putting a fan on top of air intake?

But the engine is constantly sucking in air whilst it is running even when stationary. Outside air is entering the box, how will heat soak affect it if it is drawing air from the stock box or proper heat shield?

Well the only difference is that at stationary, there is no ram air.

The static car can run at 70 degree for the charge air temperature measured from MAF using scantool on standstill, and as low as 40 degree when the vehicle is cruising.

The heat from the engine, radiator can soak up the engine compartment very rapidly. Unless u have a damn solid heatshield, it will be impossible not to have heat soak.

 

[Shaun]

Re: Putting a fan on top of air intake?

Bro, fyi the 25bucks fan is not a computer fan. Its a mini blower and has a snail shape design. hehehehe

Have any numbers? Bilge blower specs are freely available and show adequate volumetric flow at pressures around 1-2 psi. Instead of wading around in subjective descriptions, we need a CFM @ X pressure differential rating for the computer fans, snail shapes, and other types of blowers.

 

[Shaun]

Re: Putting a fan on top of air intake?

But the engine is constantly sucking in air whilst it is running even when stationary. Outside air is entering the box, how will heat soak affect it if it is drawing air from the stock box or proper heat shield?

Stationary vehicle or low engine load - Airflow in the engine bay is non-existent or low, heat builds and saturates engine bay (including intake tract). Inside the intake tract, low air speeds give enough time for the transfer of heat from the intake walls to the air mass passing through it.

High vehicle speed and/or high engine load - Airflow in the engine bay is substantial, carries heat away, and prevents heat from saturating the tracts to begin with. The average aluminium or steel hood is a big heat sink, exterior being an extremely well cooled surface. Inside the intake tract, high air speeds do not give enough time for transfer of heat from intake walls to the air mass passing through it.

 

[Whisky_Tango]

Re: Putting a fan on top of air intake?

Have any numbers? Bilge blower specs are freely available and show adequate volumetric flow at pressures around 1-2 psi. Instead of wading around in subjective descriptions, we need a CFM @ X pressure differential rating for the computer fans, snail shapes, and other types of blowers.

Sorry bro... no numbers.

Maybe you misunderstood, the cheapo fan is only good for pressurising the small airbox volume for initial low end requirement, idle to 2K rpm thereabout. Thereafter this fan is incapable.

Cheers!

 

[Shaun]

Re: Putting a fan on top of air intake?

Oh I was confused by Alan's post about the great performing green 320 I thought it was implied that it was due to the fan.

Now just to be clear on my part, I do think bilge blowers do something alot more than other little fans, but overall still very little. True manifold pressure might only be in the region of 0.X psi with one of those things. Absolutely miniscule gains compared to proper modes of FI - SC, TC.