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 1Likes
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1
Post By Carleton
03-16-2004, 04:33 PM
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Senior Club Cobra Member
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Join Date: Jan 2004
Location: St. Louis,
Mo.
Cobra Make, Engine: 427 S.O. Dual Quad / Cobra undecided
Posts: 1,380
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Not Ranked
pusher fan or pull fan, whats efficient?
I need some input on setting up a cooling system for a 351w stroked to 427.
What system do you guys utilize and why? I have understood that pushers are a good supplement to a pull type setup. Have also heard that pusher fans obstruct too much airflow. Have heard that used in unison they create an irregular and inefficient airflow. The set up I speak of uses a griffin radiator and a heavy duty pulley driven water pump. Expereince/opinions?
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03-16-2004, 04:39 PM
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CC Member
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Join Date: Jun 2003
Location: ALBUQUERQUE,
NM
Cobra Make, Engine: West Coast Cobra weber fuel injected 557 C.I.. 800H.P 760LBS. TQ. Magnum T56
Posts: 330
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Not Ranked
pushers
__________________
WHEN YOU HAVE MORE HORSEPOWER THAN YOU NEED ITS STILL NOT ENOUGH!!!!!!!
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03-17-2004, 10:04 AM
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Renegade Nuns on Wheels
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Join Date: Aug 2001
Location: columbus,
Oh
Cobra Make, Engine: Unique 427 roadster with 351C-4B
Posts: 5,129
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Not Ranked
A puller with a shroud is going to be most efficient. Pusher would be the last. Although, the pusher is more period correct.
Rick
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03-17-2004, 10:09 AM
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CC Member
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Join Date: May 2000
Location: Leicester,
UK
Cobra Make, Engine: Crendon, windsor 408 stroker, tremec. Also GSX008
Posts: 1,406
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Not Ranked
I use twin 12" pullers in individual shrouds on my car, never ever have a temperature problem (never ever see the kind of air temps some of you guys do of course, but we do get up to 90F occasionally, and it's still fine).
Radiator is also not as big as yours, nor is it ally, so I guess puller fans get the vote.
__________________
Wilf
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03-17-2004, 10:29 AM
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Renegade Nuns on Wheels
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Join Date: Aug 2001
Location: columbus,
Oh
Cobra Make, Engine: Unique 427 roadster with 351C-4B
Posts: 5,129
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Not Ranked
Quote:
Originally posted by wilf leek
nor is it ally
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'ally'......... 'alloy'  
Rick |
03-17-2004, 10:50 AM
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CC Member
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Join Date: Jul 2003
Location: Cleveland,
OH
Cobra Make, Engine: SPF1670 Stroked Little Windsor - Runs OK.
Posts: 1,244
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Not Ranked
Wasn't it Steppenwolf that said "G-- D--- the pusher man" ??
Well then there you have it, the puller fans are better, especially when enshrouded.
That was easy!
__________________
J.P.
Ohio Cobra Club
Token Gashole
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03-17-2004, 10:57 AM
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CC Member
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Join Date: Jul 2003
Location: Cleveland,
OH
Cobra Make, Engine: SPF1670 Stroked Little Windsor - Runs OK.
Posts: 1,244
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Not Ranked
Also, any avid readers out there, there's a wonderful explanation of the aluminum/aluminium thing in Bill Bryson's new book "A short history of nearly everything."
The short story is that the original word was alumium. But the American scientists thought aluminum was easier to say or something to that effect. So then the English scientists said that for consistency sake and ending element names in "ium" (rather than "num"), they would just add an i before the um.
I'm sure you all feely infinitely enlightened! I sure do...
__________________
J.P.
Ohio Cobra Club
Token Gashole
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03-18-2004, 04:54 AM
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CC Member
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Join Date: May 2000
Location: Leicester,
UK
Cobra Make, Engine: Crendon, windsor 408 stroker, tremec. Also GSX008
Posts: 1,406
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Not Ranked
Rick - "Ally" is acceptable shorthand for "Aluminium" here in the home of the Mother Tongue.
"Alloy" could mean anything - after all, brass is an alloy. 
You are going to have to try harder. 
__________________
Wilf
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03-18-2004, 05:22 AM
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CC Member
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Join Date: Mar 2004
Location: Plano,
TX
Cobra Make, Engine: None in real life (Kirkham slabside 289 in my dreams)
Posts: 87
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Not Ranked
Quote:
Originally posted by MidOHasp
Wasn't it Steppenwolf that said "G-- D--- the pusher man" ??
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The only version of that song I've ever heard is by country singer Hyot Axton.
__________________
Brian E Clough
"No user-servicable parts inside", I'll be the judge of that!
Scientific discovery doesn't sound like "Eureka!", it sounds more like "huh, that's funny...".
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03-18-2004, 06:48 AM
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Renegade Nuns on Wheels
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Join Date: Aug 2001
Location: columbus,
Oh
Cobra Make, Engine: Unique 427 roadster with 351C-4B
Posts: 5,129
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Not Ranked
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03-18-2004, 08:39 AM
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CC Member
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Join Date: Aug 2002
Location: Dacula, (Atlanta),
GA
Cobra Make, Engine: Unique 427 SC, Southern Automotive 427W Stroker
Posts: 1,649
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Not Ranked
I've got your engine set up and I'm running the twin 9" pushers (they were already installed and weren't sufficient alone). I added a 16" thin profile spal puller fan, put all three on a thermostat and haven't had a problem since.
__________________
After a good hard ride.....oil pressure is over 50, temp is below 190, she idles and no new dents. LIFE IS GOOD!
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03-18-2004, 12:13 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Bloomfield Hills, (Detroit area),
Mi
Cobra Make, Engine: Superformance 156, ex Paxton 351, now a 392 Ford Racing Stroker
Posts: 1,666
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Not Ranked
a puller ( twin smaller ones or one big one) is more efficient than pusher(s). a shroud helps even more and would be highly recommended. some pushers by themeselves are fine, depending on the efficiency of the radiator capacity. bill.
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03-18-2004, 12:20 PM
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Senior Club Cobra Member
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Join Date: Jan 2004
Location: St. Louis,
Mo.
Cobra Make, Engine: 427 S.O. Dual Quad / Cobra undecided
Posts: 1,380
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Not Ranked
Thanks much guys, keep the info coming. Every little bit makes a difference.
Mark
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03-18-2004, 01:44 PM
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CC Member
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Join Date: May 2000
Location: Leicester,
UK
Cobra Make, Engine: Crendon, windsor 408 stroker, tremec. Also GSX008
Posts: 1,406
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Not Ranked
Twin 12" pullers have approx 10% more area than one 16". Might make the difference for you, so long as you can fit 'em in.
__________________
Wilf
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03-18-2004, 04:36 PM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: ERA 427 SO
Posts: 1,126
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Not Ranked
Lineslinger, one small but very important detail that made the difference between a marginal and a good cooling fan setup was sealing the shroud to the radiator core. My previous Cobra was a little temperature "tempermental", until one day I pulled the twin pullers off and installed some split 3/8" rubber vacuum hose around the radiator side of the shroud to seal them. Apparently the fans had been sucking part of the total air flow from around the edges rather than through the radiator...after sealing them my cooling problems were over.
__________________
Ken
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03-18-2004, 06:06 PM
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Senior Club Cobra Member
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Join Date: Jan 2004
Location: St. Louis,
Mo.
Cobra Make, Engine: 427 S.O. Dual Quad / Cobra undecided
Posts: 1,380
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Not Ranked
wilf leek @ mr0077,
Thank you, it all adds up to doing it right the first time.
Mark
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03-22-2004, 04:16 AM
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CC Member
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Join Date: Jan 2003
Location: coast of maine,
me
Cobra Make, Engine: Antique & Collectible 351 windsor bored and stroked tko tremec
Posts: 209
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Not Ranked
Lineslinger i used a spal dual 11" puller fans on my car seems like the best way to go.
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03-22-2004, 09:04 PM
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CC Member
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Join Date: Aug 1999
Location: Palmdale,
Ca
Cobra Make, Engine: Commemorative Edition SRT Viper
Posts: 59
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Not Ranked
Pusher and puller fans have two different functions. If your having temperature problems driving on roads or highways, pusher fans will probably not do you any good. Concentrate what others have said, a good puller fan and shrould. However if your temperature gauge is creeping up at idle or in slow traffic, properly placed pusher fans might stop this. The puller fan is to draw the hot air out from the radiator while the pusher fans should draw and push cool air from the front in for cooling. The pushers are only needed at very slow speeds or at idling but will help if your having this problem.
Carleton
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