Anybody knows how much stock type 1 fan blows?

[jeff01]

They should be  different in 1300 and 1600 (maybe more)
But blowing flow can be measured somehow and maybe somebody knows some numbers  
I´m planning to install 2 electric fans  on my type4   I thaught that  something like this:
http://cgi.ebay.com/ebaymotors/2X-9-UNIVERSAL-12VOLT-1550-CFM-REVERSIBLE-RADIATOR-FAN-/110749083674?pt=Motors_Car_Truck_Parts_Accessories&fits=Year:2010&hash=item19c928e81a
They are 1500cfm each   is it enough or not?  I would like to use it on street on summer when temp is +15 to +25c

[Udo]

An electric fan can never make enough air for street use .
Those are for water coolers and would blow a low wind to the engine
Udo

[nicolas]

and with those temps, why waste money on something else if the stock setup will work fine?

[jeff01]

Eny numbers? anybody?

With electric fan:
 It would be easier to install to Type 4 than stock type 1 cooler.
 It could be easily switched off for little extra power.
 It would let me to install torbo where I want.

[deano]

Seems to me that the late Dog House fan spits about 300 cfm at speed, while a 911 deal is closer to 1000cfm. Sound about right? I believe Jake Raby did some serious testing on fans a few years back, as well as Gene Berg years ago (but not the 911 fan conversion)...

[didi]

jeff
fan power isn't defined only by flow. you have to compare the fan characteristic (flow vs pressure). i suppose your 1500cfm is a free flow value at zero back pressure.
yes, flow characteristics from dog house vw and 911 fans would be very interessting!

i think your plan for an electric cooling solution is a big challenge, but not impossible.

have a look at
http://www.rbernauer.de/php/content.php?action=content&id=101

didi

[Andy Sykes]

heres mine untested yet



cheers andy

[Type1/DVK]

found something: http://www.offroadvw.net/tech/wes/fan.html

[TexasTom]

Excellent information! Saves a lot of time and tedious calculations ... plus this is 'real' data.
So now you know! WE know.

Personally, I think the advantage of the stock system may lie in the directional capabilities of the airflow; so much over the head(s) & so much over the cylinders (and that varies over its length).
From that perspective & with the electric fans, you may have too much over the bottom of the cylinder and too little over the head (practically none at the center section of the fan as the motor is there). Basically uneven flow as necessitated by the design of the engine itself.
The electric, radial fans may certainly work, but it seems the 'squirrel-cage' design fans are more reminiscent of the flow & directional characteristics of the original system.

TxT

[jeff01]

thanks for all replays......now I´ve reading materials for many hours