Putting a fan on top of air intake?

[Shaun]

Re: Putting a fan on top of air intake?

Bilge blowers have been discussed once before on this site..

http://www.bmw-sg.com/forums/showthread.php?t=1724&highlight=Bilge

and before we moved here, once more on Delphi. But Delphi is long gone I believe.

 

[Whisky_Tango]

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.

What I think is that the pressurised airbox somehow gave the green 320 a kick start which I think its good enuf from a S$25 DIY.

Of course the ADM blower is much better which can provide maybe 300 to 500CFM and perhaps can sustain till 5K engine rev before it becomes a restriction.

Overall I find tat the bilge blower does improve performance for engines up to maybe 2.5L. This blower does improves drivability. Of course if one is all out for big power a SC or TC is the way to go.

 

[snowman]

Re: Putting a fan on top of air intake?

What I think is that the pressurised airbox somehow gave the green 320 a kick start which I think its good enuf from a S$25 DIY.

Of course the ADM blower is much better which can provide maybe 300 to 500CFM and perhaps can sustain till 5K engine rev before it becomes a restriction.

Overall I find tat the bilge blower does improve performance for engines up to maybe 2.5L. This blower does improves drivability. Of course if one is all out for big power a SC or TC is the way to go.

hi, can the ADM blower be install in the valvetronic? any mod needed cos there dont seems to have space for it

 

[Tanzy]

Re: Putting a fan on top of air intake?

Of course if one is all out for big power a SC or TC is the way to go.

Amen to that!

I've seen a 1.6L car with the ADM fan and MAF cheater. According to the owner, it's not that much faster compared to a same engine car with an open pod filter i.e. it's still not going to overtake it on the straights.

 

[Whisky_Tango]

Re: Putting a fan on top of air intake?

hi, can the ADM blower be install in the valvetronic? any mod needed cos there dont seems to have space for it

This ADM is installed along the air track after MAF. If the air track rubber hose has room for shortening sure can but its best to ask the ADM dealer.

BTW let us know the spec (CFM, Amps and the controls) of this ADM.

Cheers!

 

[Tanzy]

Re: Putting a fan on top of air intake?

From the looks of the BMW intake tract, I think the aircharger will fit nicely before the MAF then extending the open pod filter downwards to get cold air.

 

[Shaun]

Re: Putting a fan on top of air intake?

Of course the ADM blower is much better which can provide maybe 300 to 500CFM and perhaps can sustain till 5K engine rev before it becomes a restriction.

Continuing from numbers off the old thread, except assuming a more realistic but perhaps still somewhat optimistic VE of *80%, naturally aspirated..

A 2.2L @ 6500 RPM consumes 200 CFM
A 2.5L @ 6500 RPM consumes 227 CFM
A 2.8L @ 6500 RPM consumes 255 CFM
A 3.0L @ 6500 RPM consumes 274 CFM

So most stockish E46s short of the S54 engines with their 3245cc and 8000 RPM redlines, will not be choked off.

*Peak VE in stockish street cars will be at or right next to peak torque and is not more than 90%. VE roughly tracks the torque curve, which on 330 dynos has been shown to fall some 18% from peak, to 6500 redline. A conservative corresponding fall in VE, taking into rough account frictional losses at that RPM, is 10% - and so we arrive at 80% VE.

Also remember that bilge blowers are rated from 300-500 CFM. A 300 CFM unit which is among the lower spec-ed ones still will cover even a 3.0L engine to 6500 RPM. Even then, the rating is for a pressure differential. It does not fall abruptly off into negative at 300 CFM, but rather will begin failing to maintain the pressure differential. It will take a significantly larger demand for air from the engine before maintainable pressure differential reaches zero - no gain no loss 1:1 pressure ratio across the impeller. Then and only then, will you see a loss in WOT power over stock. Everything before that sees raised power.

While I hate to align with ricers, plus believe that the bilge blowers are a waste of money and time AND overpriced as marketed, they do not choke flow off till NA engines reach larger displacements and/or higher redlines. Proof/logical reason of/for the contrary have never been shown. I do not speak for any type of blower other than a 300-500 CFM @ 0.5-1.5 psi bilge blower. I could not care less for this product. I am only concerned with the logic.

Cheers bro

 

[Shaun]

Re: Putting a fan on top of air intake?

From the looks of the BMW intake tract, I think the aircharger will fit nicely before the MAF then extending the open pod filter downwards to get cold air.

Safer position is post-MAF. Downstream of impellers (pre-MAF) you usually get turbulence which affects MAF metering accuracy. Drawing is smoother than pushing except in the case of a pure or very nearly pure positive displacement pumps.

 

[snowman]

Re: Putting a fan on top of air intake?

This ADM is installed along the air track after MAF. If the air track rubber hose has room for shortening sure can but its best to ask the ADM dealer.

BTW let us know the spec (CFM, Amps and the controls) of this ADM.

Cheers!

alright, will give them a call to find out, cheers

 

[Whisky_Tango]

Re: Putting a fan on top of air intake?

Shaun,

Always knew you were good with the numbers. Cheers!

Yup, I too also agree with post MAF installation. MAF last longer....

Hi Snowman, thanx... appreciate it.

 

[snowman]

Re: Putting a fan on top of air intake?

Shaun,

Always knew you were good with the numbers. Cheers!

Yup, I too also agree with post MAF installation. MAF last longer....

Hi Snowman, thanx... appreciate it.

hi, i have called them up regarding the ADM air charger. the lady did some explaination and also advise me to visit their website www.autodesigns.com.sg/prod03.htm
the website provide theory on how it work and also dynoed chart as well
maybe u guys wanna check it out, seems interesting

 

[Wayansurfer]

Re: Putting a fan on top of air intake?

This ADM is installed along the air track after MAF. If the air track rubber hose has room for shortening sure can but its best to ask the ADM dealer.

BTW let us know the spec (CFM, Amps and the controls) of this ADM.

Cheers!

OT a bit..
Eric,

How was ur piping ?? Done??

 

[Whisky_Tango]

Re: Putting a fan on top of air intake?

Hi Snowman

Wah you very the efficient, so fast got info. 8amps is very little which is good but CFM is only 238! Still ok, since a 2.2L @ 6500 RPM consumes 223 CFM.
So at high end (5K to 7K rev) the power remains stock. Hope the low to mid is substantial.

Lets us know the result if you install.


Andy,
3" Ducting from the front bumper (below fog light) up to behind the headlight. Heatshield blocks heat from the engine and radiator side.

 

[snowman]

Re: Putting a fan on top of air intake?

Hi Snowman

Wah you very the efficient, so fast got info. 8amps is very little which is good but CFM is only 238! Still ok, since a 2.2L @ 6500 RPM consumes 223 CFM.
So at high end (5K to 7K rev) the power remains stock. Hope the low to mid is substantial.

Lets us know the result if you install.


Andy,
3" Ducting from the front bumper (below fog light) up to behind the headlight. Heatshield blocks heat from the engine and radiator side.

yup, guess its more suitable for lower cc car like mine(1796cc only). BTW for my cc, how much is the CFM ah?

 

[Shaun]

Re: Putting a fan on top of air intake?

So at high end (5K to 7K rev) the power remains stock.

No Eric, it will not remain stock.

 

[Whisky_Tango]

Re: Putting a fan on top of air intake?

yup, guess its more suitable for lower cc car like mine(1796cc only). BTW for my cc, how much is the CFM ah?

Think it will be 185CFM @ 6000 rev like tat.

 

[Wayansurfer]

Re: Putting a fan on top of air intake?

Hope ure happy now....khekehkhekhekheke

 

[Whisky_Tango]

Re: Putting a fan on top of air intake?

No Eric, it will not remain stock.

Im just sand bagging the results. As Im taking 2.2L with 223CFM @ 6K rev, so with 15CFM extra from ADM (238CFM) it might not be much. So Im considering that the ADM power curve will eventually meet the stock power curve at around 6K rev.

As for snowman's car, there's about 53CFM extra. Definately the power curves at 6k rev will not meet but the gains might be marginal as compared to lower revs.

Hope this clears up.

 

[jaskin]

Re: Putting a fan on top of air intake?

Was looking through the site. Previously a 318 did it. I wonder if he could give us a review.

 

[Wayansurfer]

Re: Putting a fan on top of air intake?

Was looking through the site. Previously a 318 did it. I wonder if he could give us a review.

sweeet...............