So many 66 cooling options..what should I do? - Vintage Mustang Forums
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post #1 of 18 (permalink) Old 08-05-2019, 03:53 PM Thread Starter
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So many 66 cooling options..what should I do?

The car is a 66 C code auto with factory AC

Currently it has an old (Ford stamped tanks) 3 core copper rad and a 17" flex fan. No shroud. It runs hot in traffic and the AC isn't even operational now.

I plan to fix the AC so need proper cooling. I've read every cooling thread and I'm still not sure where to go. The car is quite original but not concours. I like originality but not if it doesn't work so open to all options.

Option 1
Recore the current rad, add a shroud and get a proper clutch fan. Maybe add an electric pusher fan if the AC needs it.

Option 2
New 3 core copper, add a shroud, keep flex fan.

Option 3
Go two core aluminum, add a shroud and keep the flex fan.

Option 4
?

What say you VMF?
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post #2 of 18 (permalink) Old 08-05-2019, 05:30 PM
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I say new aluminum 2 row radiator, new six blade fan with thermal clutch and a shroud. At least that's the route I took on the 66.
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post #3 of 18 (permalink) Old 08-05-2019, 05:40 PM
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Ive got an original 2 core radiator, shroud, 6 blade fan on a 289 with AC in my 65. Hasnt overheated on 100 degree days.
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post #4 of 18 (permalink) Old 08-05-2019, 07:50 PM
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You wanna never worry about overheating? With AC in an early mustang?

2 core Alum rad (ACP makes one that looks stock) with a shroud and 6 blade fan.. OR add a SPAL 16in electric fan off a thermostatic switch.

The shroud helps immensely at idle, as does a fan that can actually move some air.

I've got a 331 stroker in my '65. Factory AC. Power Steering and a couple other things that just add heat. I've only had it out in 90 degree temps a couple of times.

My setup? ACP 2 core. Fab'd shroud with a SPAL 16in fan, driven off the holley sniper EFI (comes on at 190 and off at 180), aluminum GMP water pump and 180 T-stat (drilled). Temp gauge never goes past the middle mark, even idling forever with the AC on. (195)
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post #5 of 18 (permalink) Old 08-05-2019, 10:18 PM
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I have 2 66s with the original "C6OE - G" 7-blade fan and thermostatic clutch, shroud, and brass / copper radiators. One is 3 row replacement HD cooling and the other is 2 row for Dealer-installed air and the only heat problem I've had on HOT days has been when I unknowingly let one get low on coolant on a long highway trip. Had a surprise leak and apparently one of the people waving at me wasn't because they liked the car - - it was because they could smell the coolant when they were behind me.
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Younger son's 1st car...
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•289 / 2100 •C4 Auto
•Factory A/C •Console
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post #6 of 18 (permalink) Old 08-05-2019, 10:33 PM
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You and I are alike: 66 C-code, auto, A/C. I went with your option 3, pulling the original brass and going with 2-core aluminum plus factory shroud and clutch fan. My car is VERY original looking, but that does me no good if I can't drive it.

I also did a couple of flushes with evaporust and added an inline coolant filter to protect the new radiator from rust flakes that the evaporust might have missed.

A consolation to going with option 3 over the pure stock solution is that it is completely reversible. It's only nuts and bolts.
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Color: Y
Trim: 22
Axle: 6
Trans: 6
Build Date: July 18, 1966


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post #7 of 18 (permalink) Old 08-05-2019, 10:41 PM
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In '66 with a 289 and air conditioning you got the following:

a. A 3-core radiator with 11 fins per inch spacing.
b. A THERMAL fan clutch and 6-blade fan.
c. A radiator shroud.
d. A carburetor Hot Idle Compensator.

Back in "the day", these cars didn't overheat. They shouldn't, today, if all your pieces and parts are up to the OEM standard AND your state of tune takes into account any modifications you've made AND the fuel you are using.

Bart

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post #8 of 18 (permalink) Old 08-06-2019, 01:05 AM
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ACP MAX-CORE Two Row Aluminum Radiator (From Virginia Classic Mustang (VCM or NPD) and 2 cans of Eastwoods Radiator Black.....Six Blade Fan (clutch optional)..... All day long.....

If your radiator is original (Has Original FORD STAMPINGS)....Re-core it and keep it or sell it to someone who needs it.... Do not throw away..

)

Tony K.
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post #9 of 18 (permalink) Old 09-17-2019, 03:34 PM
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Quote:
Originally Posted by Rowdy View Post
You wanna never worry about overheating? With AC in an early mustang?

2 core Alum rad (ACP makes one that looks stock) with a shroud and 6 blade fan.. OR add a SPAL 16in electric fan off a thermostatic switch.

The shroud helps immensely at idle, as does a fan that can actually move some air.

I've got a 331 stroker in my '65. Factory AC. Power Steering and a couple other things that just add heat. I've only had it out in 90 degree temps a couple of times.

My setup? ACP 2 core. Fab'd shroud with a SPAL 16in fan, driven off the holley sniper EFI (comes on at 190 and off at 180), aluminum GMP water pump and 180 T-stat (drilled). Temp gauge never goes past the middle mark, even idling forever with the AC on. (195)

I like this setup - just wanted to know the fabing of the shroud over the Spal 16in fan. I have the Sniper EFI AC PS AT - trying to keep my car cooler down here in Texas.... Thought I'd go with the 3 core Aluminum ACP - Thoughts

Warm Regards
Todd



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post #10 of 18 (permalink) Old 09-17-2019, 06:25 PM
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18" GM fan and 75 Chevy thermostatic fan clutch and 2 row aluminum radiator. While it really should have a shroud, it cools fine even idling

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post #11 of 18 (permalink) Old 09-17-2019, 08:48 PM
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Quote:
Originally Posted by Woodchuck View Post
In '66 with a 289 and air conditioning you got the following:

a. A 3-core radiator with 11 fins per inch spacing.
b. A THERMAL fan clutch and 6-blade fan.
c. A radiator shroud.
da. A carburetor Hot Idle Compensator.

Back in "the day", these cars didn't overheat. They shouldn't, today, if all your pieces and parts are up to the OEM standard AND your state of tune takes into account any modifications you've made AND the fuel you are using.
I’m curious what you mean when you talk about tuning for the fuel you’re using. Thanks.
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post #12 of 18 (permalink) Old 09-17-2019, 08:58 PM
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Quote:
Originally Posted by Quicksilver66 View Post
I’m curious what you mean when you talk about tuning for the fuel you’re using. Thanks.
Today's gasoline isn't formulated the same as it was back "in the day". Fuels containing ethanol as an oxygenator don't burn at the same rate as "pure" gasoline so it's necessary to experiment with carburetor jetting and ignition timing in order to find the settings that work best for any particular build.
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- Alfred E. Neuman

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post #13 of 18 (permalink) Old 09-17-2019, 11:53 PM
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I have some old aftermarket (stock replacement) radiator, a 302, flex fan, and no shroud. My car never overheats. I'm thinking about adding a shroud just for safety, I'm a scatter-brained idiot and sooner or later I'll lose a hand to that thing.
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post #14 of 18 (permalink) Old 09-18-2019, 12:07 AM
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Quote:
Originally Posted by Feethurt View Post
I have some old aftermarket (stock replacement) radiator, a 302, flex fan, and no shroud. My car never overheats. I'm thinking about adding a shroud just for safety, I'm a scatter-brained idiot and sooner or later I'll lose a hand to that thing.
Then you better add something besides the stock shroud or put a guard over it, because the stock one is not very wide and the fan only sits half inside it.
I can relate to being scatterbrained.

My 1st car...
'66 Tahoe Turquoise/ Aqua coupe
•289 / 4100 •C4 Auto •Disc Brakes
•Dual Exhaust •Quick Manual Steering
•Rally Pac •Console •Deluxe Belts
•LOTS of Rotunda accessories

Older son's 1st car...
'66 Emberglo / Parchment deluxe coupe
•289 / 2100 •C4 Auto
•Dealer A/C • Console
•Dual Exhaust • Power Steering

Younger son's 1st car...
'66 Nightmist / Blue & white deluxe coupe
•289 / 2100 •C4 Auto
•Factory A/C •Console
WAITING FOR RESTORATION

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post #15 of 18 (permalink) Old 09-18-2019, 12:13 AM
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Originally Posted by tmadden View Post
I like this setup - just wanted to know the fabing of the shroud over the Spal 16in fan. I have the Sniper EFI AC PS AT - trying to keep my car cooler down here in Texas.... Thought I'd go with the 3 core Aluminum ACP - Thoughts
I had a local tin shop just bend up a small shroud that the SPAL fan now mounts to and it mounts to the rad mounts. Pretty simple.

Either the two or three core ACP rads work.

If I was in a hotter climate, I'd probably consider doing the swap to the bigger +67 rad..
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