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Unread 03-22-2011   #1 (permalink)
Pig Muffin is offline GT Member

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Default Electric Fan - 306cid - Pusher or Puller? What CFM is needed?

Ok so pusher or puller? Is there a benefit to either one over the other? Also, what CFM would be adequate for a 350hp motor?

I am going to be running the kind of open grille gt350 look and think it would look cool to see the fan through the grille like Lizer’s car, oops I meant Nick Jonas, from the Jona’s brothers car pictured below. It is actually one of the Jonas brothers cars. HAHAHAHA.
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Electric Fan - 306cid - Pusher or Puller?  What CFM is needed?-nick-jonas.jpg  
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Unread 03-22-2011   #2 (permalink)
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2300cfm or above. A lot of the ones sold are are only half that. The Ford Taurus fan rates at 4000cfm if that tells you anything. It is a popular upgrade in the Bronco crowd I run with, but I have no experience adapting one to a Mustang. Keep in mind how much juice electric fans pull and plan accordingly. As far as push or pull, mounting and clearance usually determines that for you.
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Unread 03-22-2011   #3 (permalink)
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Quote:
Originally Posted by Explorer View Post
2300cfm or above. A lot of the ones sold are are only half that. The Ford Taurus fan rates at 4000cfm if that tells you anything. It is a popular upgrade in the Bronco crowd I run with, but I have no experience adapting one to a Mustang. Keep in mind how much juice electric fans pull and plan accordingly. As far as push or pull, mounting and clearance usually determines that for you.
I have a 100amp alternator, 40 more than stock so I should be ok with the juice.

What do you think about through mounting (through the radiator) as oppposed to other methods? I have a brand new 300 dollar aluminum radiator I dont want to stab but if thats the way to go that to hell with it.
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1968, 302 .030 / Comp Cams Magnum 270h #31-414-3 501 lift @ .050 dur 224/224
Comp Cams Magnum Lifters and Pushrods Comp Cams 1.6 Full Roller Rockers
Edelbrock RPM heads (2.02 / 1.60) / RPM Air Gap
Holley Street Avenger 670 carb
Edelbrock 110gph Fuel Pump
Cloyes Street True Roller Timing Chain / Professional Products Harmonic Balancer
MSD Pro billet Dizzy, 6AL Box, Blaster 2 Coil
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Unread 03-22-2011   #4 (permalink)
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I would go behind the radiator if you have the room for it. I may be wrong but puller fans in shrouds cool far far better than a pusher will, because of the shroud. above 25 mph the fan is not even needed but you want to utilize the full cooling capacity of your new aluminum radiator where its really needed - in slow traffic. The 100 amp alt. is a great upgrades but also think about a soft start relay like the ones flexalite sells, they are 90-100 bucks but worth every cent. It will bring the fan up slowly so your alt will live a long time, 50 amp draw spikes will kill it sooner than later. The Taurus, lincoln Mark 8, Crown Vic Police Package fans all move massive air to more than handle your 306. I have a police package fan on my 351C (+.030, roller cam, roller rockers, Fuel injected, ac, ps, 4 wheel disc.....) and it keeps it cool in 100* heat with the ac on in traffic.
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Unread 03-22-2011   #5 (permalink)
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silver...flexalite is exactly what I will be getting with the full wiring including that relay. perfect.
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1968, 302 .030 / Comp Cams Magnum 270h #31-414-3 501 lift @ .050 dur 224/224
Comp Cams Magnum Lifters and Pushrods Comp Cams 1.6 Full Roller Rockers
Edelbrock RPM heads (2.02 / 1.60) / RPM Air Gap
Holley Street Avenger 670 carb
Edelbrock 110gph Fuel Pump
Cloyes Street True Roller Timing Chain / Professional Products Harmonic Balancer
MSD Pro billet Dizzy, 6AL Box, Blaster 2 Coil
Flowtech Long Tube Headers
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Unread 03-22-2011   #6 (permalink)
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I hated evenputting my power steering cooler attached thru the radiator. Here is a link to a relay kit with manual over ride: FC-3: Fan Relay with Sender
Seems like it would be really handy in traffic. We use them a lot on trail rigs where speeds are slow and temps high.
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Unread 03-22-2011   #7 (permalink)
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I agree with the 4000 CFM comment. I have an all aluminum radiator in my '51 chevy with a fairly built 350. Heavy truck with a hot motor. Doesnt matter if im in stop and go, Denver traffic on a 90 degree day or running interstate for 500 miles at a time, it never gets above 185-190. Mine is radiator mounted through the fins, and it works great, but I will build metal mounts. Just the idea of plasic holding my fan on, bugs me.
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Unread 03-22-2011   #8 (permalink)
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I second that 67moneypit, I put mine inside the oem fanshorud. Its ducted really well and I did not have to get too creative to mount on to the radiator. If I did not tell you or it did not come on you would not know I was electric fan equipped.
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Unread 03-22-2011   #9 (permalink)
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Pig - very smart choice on that relay, you will be amazed of how seamlessly it functions. Check this out, if its running and you shut the motor off and then go to restart it really soon, like a30-60 seconds later, the controller cuts the fan off so your starter gets all the amperage it needs and 10 seconds after you release the ignition key the cooling fan comes back into action. I just think that is cool as heck. It also has an ac curcit to come on with the comporessor.
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