Dual Spals vrs. Mark VIII = the maddess must stop
#21
Former Vendor
Originally Posted by PhotoVette1
You outta try one--I tried your radiator...
What is the h x w measurements?
What's the cost at a Ford dealer?
#22
Former Vendor
Originally Posted by sharkman76
Check out these Spals they are larger and more agressive than what I see here and other places. The cfm ratings look good too. Hight is the only concern but at less than 3/8th diff a little foam will fit the bill!!!!
http://cgi.ebay.com/ebaymotors/DUAL-...4309QQtcZphoto
http://cgi.ebay.com/ebaymotors/DUAL-...4309QQtcZphoto
#23
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Originally Posted by Tom DeWitt
I'm checking these out but we have had problems finding the exact center mounting position with the dual 11" on C3 cars and that package is 23.5 wide. It seems if we move this fan 1/4" left or right someone complains about the A-arms. This new one is 2" wider!
#24
Melting Slicks
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Last spring I installed 2 12 inch fans directly to my rad and positioned them so that they could be used in conjunction with my stock shroud and fan. I had to cut a small notch out of the shroud next to the left a-arm but it did fit. Sad thing is that only one fan is working; the other has a short in the wiring going into the fan. The good news is the car runs cool anyway with just one electric fan and the stock one. Twelve inch fans do work but I don't know if they would with a shroud attached. It would definately be close!
Bernie
Bernie
#25
Daul Spals!
I installed a Dewits alum. radiator with the daul spals I did get a 20* drop in temp from 220* now down to 200* / 180* depends on the day? I know I can get these temps lower as I dont have the raidator seals installed [cant seem to find any quality seals, for another post]. I also originally used the the PWM, then I thougt I was smarter than others [ha ha] and wired them through a coolant temp switch on @ 180* off 200*[or so] now that I have read all these treads, I have a better understanding of workings of the fan, I now realize that my fans dont shut off ever. So my winter project is to intsall good radiator seals and 2 PWM controllers[probably not needed] and I am confident my temps will be a consistent 180* or lower !!! Hey Tom any opinoin on using 2 controllers?
#26
Safety Car
Originally Posted by Tom DeWitt
Does anyone have a photo with it laying on the core face?
What is the h x w measurements?
What's the cost at a Ford dealer?
What is the h x w measurements?
What's the cost at a Ford dealer?
Height: RF64 = 18.500" SPAL = 16.250"
Width: RF64 = 22.000" SPAL = 23.500"
Total Coverage: RF64 = 407 in/sq SPAL = 381 in/sq
which is about the same given the slight overlap on top and bottom. You will note that the fan housing never comes in contact with the fins as it is pressed against the upper and lower supports on the radiator.
This is shown on a radiator from 1976 Vette (which was in my '77 Vette.)
I like the way the DC Controls contoller is designed to fit in the shroud:
You can even add a coolant overflow tank to make it a one piece intergal component--I'm not going that far.
Last edited by PhotoVette1; 09-18-2006 at 07:55 PM.
#27
Melting Slicks
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CI 5 & 8 Veteran
Originally Posted by breathial
I have two 12-inch "Permacool" fans on a recored BB rad. The name brand should be "Perma-SUCK," they don't work worth a darn.
Honestly, I don't care if I have to pony up for a 140-amp alternator, better than popping a head gasket...
I've learned the hard way- go with the biggest honkin' fan you can get... If it lowers the temp TOO much, that's what the thermostat is for...
Honestly, I don't care if I have to pony up for a 140-amp alternator, better than popping a head gasket...
I've learned the hard way- go with the biggest honkin' fan you can get... If it lowers the temp TOO much, that's what the thermostat is for...
Bullshark
#28
Former Vendor
Originally Posted by Bullshark
"big honkin radiator
Bullshark
Bullshark
"Don't you make anything bigger"? I hear it all the time....
I think we've established that C3 C/B radiators were pretty good....
then, an aluminum radiator is a major upgrade....
Dual fans is another upgrade...but still don't you have something bigger?
If we made the another super mega max big honkin unit, guess what?
Don't you have something bigger?
#30
Safety Car
Originally Posted by Tom DeWitt
When it comes to radiators, fans, or water pumps it seems that bigger is better. At least that's what I hear when people call in.
"Don't you make anything bigger"? I hear it all the time....
I think we've established that C3 C/B radiators were pretty good....
then, an aluminum radiator is a major upgrade....
Dual fans is another upgrade...but still don't you have something bigger?
If we made the another super mega max big honkin unit, guess what?
Don't you have something bigger?
"Don't you make anything bigger"? I hear it all the time....
I think we've established that C3 C/B radiators were pretty good....
then, an aluminum radiator is a major upgrade....
Dual fans is another upgrade...but still don't you have something bigger?
If we made the another super mega max big honkin unit, guess what?
Don't you have something bigger?
#31
Melting Slicks
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CI 5 & 8 Veteran
Originally Posted by Tom DeWitt
When it comes to radiators, fans, or water pumps it seems that bigger is better. At least that's what I hear when people call in.
"Don't you make anything bigger"? I hear it all the time....
I think we've established that C3 C/B radiators were pretty good....
then, an aluminum radiator is a major upgrade....
Dual fans is another upgrade...but still don't you have something bigger?
If we made the another super mega max big honkin unit, guess what?
Don't you have something bigger?
"Don't you make anything bigger"? I hear it all the time....
I think we've established that C3 C/B radiators were pretty good....
then, an aluminum radiator is a major upgrade....
Dual fans is another upgrade...but still don't you have something bigger?
If we made the another super mega max big honkin unit, guess what?
Don't you have something bigger?
Bullshark
Last edited by Bullshark; 09-18-2006 at 11:02 PM.
#32
Originally Posted by Bullshark
The best possible setup will only use the thermostat to quickly get up to operating temp and to regulate in those extreme cold temp evironments. You should want the ambient air flow resulting from car speed to regulate the water temp when in motion. Fans should come in to play when stopped or after heavy load operation. I know that may sound hard to achieve but it really isn't.
There are quite a few options, each with their respective advantages and disadvantages. For my money, I decided that having a 2-speed fan with independant temp. switches for each one, would be the best option. Yeah, I'd be maxxing out the alternator at idle- in fast speed- but I doubt this would be the normal situation...
As one of the other guys (also a nuclear engineer in a former life) has stated, thermal transfer efficiency is dependant on the following formula:
Q=UA(Th-Tc). U= overall heat transfer efficiency (where the DeWitts rad comes into play), A= area of the heat transfer medium, and the Temperature difference between the inlet and outlet temps of the heat exchanger. This covers the efficiency of the cooling system...
Actual rate of heat exchange of that system, is defined by Q=Mc(Th-Tc). Th, Tc are the same, m= mass flow rate of the coolant in the system, and c is a constant (the heat rate of water, or in this case, anti-freeze and water solution). This formula works for both the radiator-air heat, and also for the engine block-engine coolant exchanges.
So, for a given system- either your water pump or the fan- increasing the flow rate of the cooling medium will result in a higher rate of heat transfer, all else being equal. The limitations of the water pump, are due to cavitation, more than anything else. The limits of the radiator are due to the fan, and whatever ambient temperature is...
So it becomes a matter of choice- aluminum radiator and all the "sexy" stuff that goes along with that, or simply get the biggest fan you can get your grubbies on, and run with that. I chose the latter, you chose the former... To each their own, I guess.
And honestly, it was a simple choice for me: my wife, being an accountant, is keeping me very honest on how I spend money, and while she encourages my working on my toy, she demands that I get the absolutely best bang for every ducat spent... Which, honestly, I think is pretty cool...
I can easily explain why I'm spending $100 for a fan... But $1000 for a new aluminum radiator and dual fans...? No... I'll pass on that battle...
Be well.
#33
Melting Slicks
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CI 5 & 8 Veteran
Originally Posted by breathial
I can easily explain why I'm spending $100 for a fan... But $1000 for a new aluminum radiator and dual fans...? No... I'll pass on that battle...
Be well.
Be well.
Ok, Everyone has their $$ priorities. I won't tell her about the $100+ alternator if you don't
My wife still thinks that RamJet 502 cost $3K
Bullshark
Last edited by Bullshark; 09-18-2006 at 11:40 PM.
#34
Originally Posted by Bullshark
Ok, Everyone has their $$ priorities. I won't tell her about the $100+ alternator if you don't
My wife still thinks that RamJet 502 cost $3K
Bullshark
My wife still thinks that RamJet 502 cost $3K
Bullshark
I showed my wife what you said.... She says, if I tried something like this, it would be IMPOSSIBLE to hide...
And she's right...
#35
Drifting
Photovette and Bernie
How do you guys have your fan set up to run? 1 speed only (high)? 2 speeds? Variable? Whats temps does low come on, what temps for hi?
ESU
ESU
#36
Team Owner
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Location: Columbia Missouri
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Originally Posted by ESU
How do you guys have your fan set up to run? 1 speed only (high)? 2 speeds? Variable? Whats temps does low come on, what temps for hi?
ESU
ESU
I'm interested in this too...
#38
Drifting
Originally Posted by chevymans 77
I am using a Spal PWM low is set at 160 and high is set at 190. It’s a variable speed contoler.
ESU
#39
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Originally Posted by chevymans 77
I am using a Spal PWM low is set at 160 and high is set at 190. It’s a variable speed contoler.
Where did you get it, and how many amps does it handle?
#40
Melting Slicks
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St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19
Originally Posted by Durango_boy
Where did you get it, and how many amps does it handle?