Best electric fan setup for Dewitt's radiator
#1
Best electric fan setup for Dewitt's radiator
I'm getting ready to get a Dewitts HP radiator for my 69 and wanted to know if there is a better (and possibly cheaper) dual electric fan assembly for it. The one that Dewitts offers with it costs around 450 bucks which seems a bit steep. I can't use an engine driven fan because I'm going to put a Weiand 8-71 blower on it when I do the radiator swap. If anybody knows if there is a better (and hopefully cheaper) dual electric fan assembly for it please post the info. Any help is appreciated.
#2
Team Owner
Member Since: Oct 2004
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St. Jude Donor '05
OEM fan off a truck or? Seen some post they use C5 fans.
Whats the measurement of surface area on the C3 radiator?
450 seems like a lot but those are really really good at cooling...had them on a ZR1 that would heat soak big time..flawless.SUmmer wiht AC on beating on it never once did the temp rise, they are worth it.
Dont go the ebay route...
Whats the measurement of surface area on the C3 radiator?
450 seems like a lot but those are really really good at cooling...had them on a ZR1 that would heat soak big time..flawless.SUmmer wiht AC on beating on it never once did the temp rise, they are worth it.
Dont go the ebay route...
#3
Burning Brakes
OEM fan off a truck or? Seen some post they use C5 fans.
Whats the measurement of surface area on the C3 radiator?
450 seems like a lot but those are really really good at cooling...had them on a ZR1 that would heat soak big time..flawless.SUmmer wiht AC on beating on it never once did the temp rise, they are worth it.
Dont go the ebay route...
Whats the measurement of surface area on the C3 radiator?
450 seems like a lot but those are really really good at cooling...had them on a ZR1 that would heat soak big time..flawless.SUmmer wiht AC on beating on it never once did the temp rise, they are worth it.
Dont go the ebay route...
I went with this and it is awesome. My 496 can idle all day in the heat with no issues. https://www.summitracing.com/parts/d...m/applications
No they are not cheap but they work really really well.
#4
Drifting
I'm getting ready to get a Dewitts HP radiator for my 69 and wanted to know if there is a better (and possibly cheaper) dual electric fan assembly for it. The one that Dewitts offers with it costs around 450 bucks which seems a bit steep. I can't use an engine driven fan because I'm going to put a Weiand 8-71 blower on it when I do the radiator swap. If anybody knows if there is a better (and hopefully cheaper) dual electric fan assembly for it please post the info. Any help is appreciated.
Some of the best dual fan setups for our cars are
93-02 Fbody
c5+
SPAL
focus fans
Single fans
Lincoln Mark VIII, possible alternatives Tbird/Mustang/Crown Vic
Taurus
Volvo
Black Magic
But you need to be aware you may need to upgrade your alternator for most of these.
Last edited by Kacyc3; 04-22-2019 at 12:59 PM.
#5
Melting Slicks
#6
Race Director
I've had the SPAL duals on my 71 BBC for 20 years and they have never given me any trouble. Keeps the 454 cool in TX heat, can't ask for more. I have mine setup to run at half speed whenever ignition is on, and go to full speed at 200F. They rarely go full speed.
#7
Team Owner
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St. Jude Donor '05
WHat controllers are you guys using? Have a simple fan switch in the intake, dont care for it. WIll it work with thier 16 inch single (tolerating different speeds?)
What wiring upgrades need to be done other than the lead coming off the alt?
What wiring upgrades need to be done other than the lead coming off the alt?
#8
Drifting
Depending which fan you choose possibly the alternator itself, some of the fans I listed drawl serious amps at startup. Another theory is you shouldnt pull directly from the alt lug as it could cause issues, which means either a new cable ran to battery or a distribution block added under hood. I personally dont care for the temp probes you you put in the radiator fins or hoses for the temp, You could wire in a manual switch that grounds the relay for the fan to turn it on if you are worried about a thermo switch, my EFI controls the fan.
#9
Race Director
'Better' and 'Best' are relative terms.
Dewitt's fan setup will be mostly plug n play. Anything else and you'll have to figure out mounting of the fans/shrouds and wiring.
Dewitt's fan setup will be mostly plug n play. Anything else and you'll have to figure out mounting of the fans/shrouds and wiring.
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george2066 (04-24-2019)
#10
Race Director
BMW 2 temp switch, Volvo relays, Focus fans. It's a common setup.
#11
Race Director
I have a fusible link at the alt stud, then goes to a small fuse box mounted next to the brake booster. Next to that are the relays to control high/low speed. The speed switch is controlled by my EFI setup (it provides a ground when the engine hits 200F).
#12
Burning Brakes
#14
I went ahead and bought the radiator/dual electric fan combo from Dewitts yesterday. I wish the spal fan assembly was a bit cheaper but it is what it is I guess. You mentioned an alternator upgrade, what one would you recommend? What amp rating? The one in the car right now is a 63 amp unit with an internal regulator. The new alternator would need to be internally regulated and have the electrical plug "clocked" in the right position (by where the threaded adjustment bolt holes is).
Last edited by TheGreek!; 04-23-2019 at 09:30 AM.
#15
Burning Brakes
I went ahead and bought the radiator/dual electric fan combo from Dewitts yesterday. I wish the spal fan assembly was a bit cheaper but it is what it is I guess. You mentioned an alternator upgrade, what one would you recommend? What amp rating? The one in the car right now is a 63 amp unit with an internal regulator. The new alternator would need to be internally regulated and have the electrical plug "clocked" in the right position (by where the threaded adjustment bolt goes).
Last edited by PainfullySlow; 04-23-2019 at 09:21 AM.
#16
Drifting
You made the right choice. I put their rad and fan kit on several years ago with no issues. At the end of the day it's not worth messing with when the solution works.
#17
There are lots of threads about upgrading your alternator here. Most use a CS144 style specifically because the case is very close to what was originally in the car. If it is not clocked correctly you simply have to remove 3 bolts and clock it to where you want it. I personally went the route of a junkyard CS144 at 140 amps because I wanted to powdercoat and rebuild it myself. You can go this route and save some $ (I have about $80 into it) or there are plenty of places where you can buy them rebuilt/new. The only wiring that needs to be done is a single plug at the alternator itself so it is as close to plug and play as you will get. A search here will yield more info than you could possibly want =).
#18
Drifting
I went ahead and bought the radiator/dual electric fan combo from Dewitts yesterday. I wish the spal fan assembly was a bit cheaper but it is what it is I guess. You mentioned an alternator upgrade, what one would you recommend? What amp rating? The one in the car right now is a 63 amp unit with an internal regulator. The new alternator would need to be internally regulated and have the electrical plug "clocked" in the right position (by where the threaded adjustment bolt goes).
#20
Race Director
Brushed fans are like an 8-track player...
yea, sure it plays music... but compared to say... A CD... it's junk.
obsoleet
if you want a very nice fan, USA made... get a Delta PAG
less than 1/2 the current draw, less than 1/2 the weight, less then 1/2 the size of the motor. 10,000 times more reliable. computer controlled speed under any condition,
https://deltapag.com
I run a 650+HP 427 SBC that I road race... cools great.
yea, sure it plays music... but compared to say... A CD... it's junk.
obsoleet
if you want a very nice fan, USA made... get a Delta PAG
less than 1/2 the current draw, less than 1/2 the weight, less then 1/2 the size of the motor. 10,000 times more reliable. computer controlled speed under any condition,
https://deltapag.com
I run a 650+HP 427 SBC that I road race... cools great.