Electirc Fan / Push or Pull
Thread Starter
Pro
Joined: Sep 2002
Posts: 546
Likes: 0
From: Pinellas Park FL
Electirc Fan / Push or Pull
For those of you who have installed an electric fan setup, what is the preferred method? A push type or a pull type. For a big block with A/C, a duel or a single ?
Thanks in advance.
Ron
Thanks in advance.
Ron
Burning Brakes
Joined: Aug 2005
Posts: 1,164
Likes: 1
From: Europe, France
Pull type is always more efficient.
You can find good electric large single fans like Ford Taurus one, or mark VIII. These are enough for big blocks, they move a LOT of air !
Make a search on the forum with these names.
Remember that a stock alternator is not sufficient for such fans. They draw a lot of current
See CS130 or CS144 alternators too.
If you want to see my fans, click on "My corvette photos" on the left.
They are dual SPALS and they work great. I made the fan shroud myself.
More pictures here :
http://forums.corvetteforum.com/c3-t...-pictures.html
and here :
http://forums.corvetteforum.com/c3-t...l-chapter.html
You can find good electric large single fans like Ford Taurus one, or mark VIII. These are enough for big blocks, they move a LOT of air !
Make a search on the forum with these names.
Remember that a stock alternator is not sufficient for such fans. They draw a lot of current
See CS130 or CS144 alternators too.
If you want to see my fans, click on "My corvette photos" on the left.
They are dual SPALS and they work great. I made the fan shroud myself.
More pictures here :
http://forums.corvetteforum.com/c3-t...-pictures.html
and here :
http://forums.corvetteforum.com/c3-t...l-chapter.html
Last edited by 73StreetRace; May 14, 2009 at 02:20 PM.
Le Mans Master
Joined: Apr 2001
Posts: 5,000
Likes: 1
From: Minneapolis, Mn USA
I did Lincoln Mark VIII with CS144 to drive it.
Set-up costs approx:
CS144 (140Amp) from Napa: $130
CS144 harness + extra wiring + fusible link: $40
Lincoln Mark VIII fan: $80
Proliance 4 core Big Block rad(medium quality at best): $255
Fan Switch(200on 185off): $50
180 thermostat (Napa premium unit) ($30)
Tyco (Bosch equiv)75A relay $50
Wiring and resetable circut breakers misc: $50
Misc metal brackets: $40
Rad fluid 3 gallons(Prestone Extended Life green:$30
$755 total ballpark-not too bad!!
Set-up costs approx:
CS144 (140Amp) from Napa: $130
CS144 harness + extra wiring + fusible link: $40
Lincoln Mark VIII fan: $80
Proliance 4 core Big Block rad(medium quality at best): $255
Fan Switch(200on 185off): $50
180 thermostat (Napa premium unit) ($30)
Tyco (Bosch equiv)75A relay $50
Wiring and resetable circut breakers misc: $50
Misc metal brackets: $40
Rad fluid 3 gallons(Prestone Extended Life green:$30
$755 total ballpark-not too bad!!
Last edited by MN-Brent; May 14, 2009 at 10:18 PM.
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Instructor
Joined: Jan 2005
Posts: 152
Likes: 0
From: Denver Colorado
Dual SPAL pullers on my car!! but just as important is a good thermostatic controller (sending unit and relay kit) however the Dual SPAL pullers taxed my charging system I had to upgrade there also.
Racer
Joined: Feb 2009
Posts: 273
Likes: 11
From: Algona, WA
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
I'm still trying to figure out why anyone would spend that much money on a new radiator and electric fan set-up, only to have air sucked through just the diameter of the fan. Doesn't anyone buy/fabricate a shroud to draw air through the whole radiator? A simple shroud would probably increase cooling efficiency of the system by 40-50%! {Oh, pulling is more efficient than pushing, as the fan [itself] is not blocking/disturbing the inlet airflow.}
Racer
Joined: Feb 2009
Posts: 273
Likes: 11
From: Algona, WA
I don't know about anyone else but, I run a BBC all aluminum motor including
oil pan. It gives me the versatility to adjust for street use, drag strip use, with or without nitrous. I also run preheaters for both water and oil.
Too much heat loss can become a reality when between rounds at the strip. Consistency can be very important.
To spend a grand on cooling, to protect a very expensive motor, is cheap.
Now on the other hand, a 462" iron block BBC that I run in my 67 442 loves the twin pullers and fully shrouded aluminum radiator. But a much better heat sink. Works very well. Totally agree, that is the way to go.
IMHO
oil pan. It gives me the versatility to adjust for street use, drag strip use, with or without nitrous. I also run preheaters for both water and oil.
Too much heat loss can become a reality when between rounds at the strip. Consistency can be very important.
To spend a grand on cooling, to protect a very expensive motor, is cheap.
Now on the other hand, a 462" iron block BBC that I run in my 67 442 loves the twin pullers and fully shrouded aluminum radiator. But a much better heat sink. Works very well. Totally agree, that is the way to go.
IMHO
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
I'm still trying to figure out why anyone would spend that much money on a new radiator and electric fan set-up, only to have air sucked through just the diameter of the fan. Doesn't anyone buy/fabricate a shroud to draw air through the whole radiator? A simple shroud would probably increase cooling efficiency of the system by 40-50%! {Oh, pulling is more efficient than pushing, as the fan [itself] is not blocking/disturbing the inlet airflow.}
Yup... you correct, Here is a thread I just compleated, I run 2 Spal fans, a PWM, Full aluminun shroud and more... check it out, it may give you your answer... if not take a look at the pictures for the fan shroud.. p
http://forums.corvetteforum.com/c3-t...-shroud-4.html
Burning Brakes
Joined: Aug 2005
Posts: 1,164
Likes: 1
From: Europe, France
I'm still trying to figure out why anyone would spend that much money on a new radiator and electric fan set-up, only to have air sucked through just the diameter of the fan. Doesn't anyone buy/fabricate a shroud to draw air through the whole radiator? A simple shroud would probably increase cooling efficiency of the system by 40-50%! {Oh, pulling is more efficient than pushing, as the fan [itself] is not blocking/disturbing the inlet airflow.}
Drifting
Joined: Apr 2006
Posts: 1,911
Likes: 2
From: gold coast queensland
I'm still trying to figure out why anyone would spend that much money on a new radiator and electric fan set-up, only to have air sucked through just the diameter of the fan. Doesn't anyone buy/fabricate a shroud to draw air through the whole radiator? A simple shroud would probably increase cooling efficiency of the system by 40-50%! {Oh, pulling is more efficient than pushing, as the fan [itself] is not blocking/disturbing the inlet airflow.}barracading the back of a radiator with a shroud will certainly help your fans pull air over a broader area but also restrict airflow when cruising.
if your fan and radiator or sufficient enough to not need a shroud then why have one?
Last edited by gingerbreadman1977; May 17, 2009 at 04:42 AM.
Burning Brakes
Joined: Aug 2005
Posts: 1,164
Likes: 1
From: Europe, France
But as you say, if your fan and radiator are sufficient, you don't need anything else.
However, some people may need something more efficient, like a shroud, especially with the high temperatures in Summer, a Big Block and/or some serious power
