One more cooling issue

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Your shroud is blocking off more of the radiator than it includes. You need a shroud that includes the full rectangle of the core. Also, if you have a pusher on the front, unless it is completely out of line with the inside fan, they are somewhat cancelling some of each other's air movement. 2950 is nowhere near the needed amount for a high performance engine. The absolute smallest I would use would be 3300 and I would rather have 4000 or higher. You get that core seeing more air flow and I just bet you fix your problem.
I also had doubts if it was enough fan thanks. If I end up replacing the radiator a new fan set up be included. I have very limited space though
 
That sure doesn't look like a lot of flow. Tough to tell from a still picture. I would agree about asking the pulley diameters on the crank and water pump. Maybe even get that radiator flowed to assure it's working properly. Between water and air flow, SOMETHING is wrong. I would work on a better shroud that included all of the core, more fan and increase the water flow "somehow". It looks like you have a few things fighting against you.
The main problem with the fan other than being too slow is the lack of room between the radiator and pulley. The fan motor is literally in between the water pump and power steering pulley
 
Your shroud is blocking off more of the radiator than it includes. You need a shroud that includes the full rectangle of the core. Also, if you have a pusher on the front, unless it is completely out of line with the inside fan, they are somewhat cancelling some of each other's air movement. 2950 is nowhere near the needed amount for a high performance engine. The absolute smallest I would use would be 3300 and I would rather have 4000 or higher. You get that core seeing more air flow and I just bet you fix your problem.
The only way to do that is to go with a pusher setup. Which I may have
To do
 
I believe you would have better luck with a different radiator. That sumbitch it takin up a lot of real estate with the core width. If I were you, I'd look at a Griffin 2 row. I think you're losing something somehow with that radiator. Big as that thing is, you should just about be able to throw the fans in the ditch and not overheat. That thing holds a LOT of coolant. It's inefficient somehow. Add that to your list, and it's easy to see how it's overheating. I think you could straighten out all the rest and it might stop it from overheating, but that radiator, IMO is the worst culprit. You are SLAP not getting your money's worth from it.
 
I believe you would have better luck with a different radiator. That sumbitch it takin up a lot of real estate with the core width. If I were you, I'd look at a Griffin 2 row. I think you're losing something somehow with that radiator. Big as that thing is, you should just about be able to throw the fans in the ditch and not overheat. That thing holds a LOT of coolant. It's inefficient somehow. Add that to your list, and it's easy to see how it's overheating. I think you could straighten out all the rest and it might stop it from overheating, but that radiator, IMO is the worst culprit. You are SLAP not getting your money's worth from it.

I just looked at ur pic, shroud and fan are worthless. The fan is sucking air from the sides of the shroud backwards from the engine compartment , fan don`t flow enough anyway !
I drove my 505" fastback a little yesterday , it got up to 208 in town , and cooled back off to 195 on the road , it was 96 in the shade and pretty humid .
How much room do u have between the pump and rad. ?
 
I just looked at ur pic, shroud and fan are worthless. The fan is sucking air from the sides of the shroud backwards from the engine compartment , fan don`t flow enough anyway !
I drove my 505" fastback a little yesterday , it got up to 208 in town , and cooled back off to 195 on the road , it was 96 in the shade and pretty humid .
How much room do u have between the pump and rad. ?
I literally have a couple of inches if that between the radiator and the water pump pulley. In fact the fan Hass to be offset some and it’s motor Ride directly between the water pump pulley and power steering pulley. Any radiator/fan upgrade that I’m going to do is likely going to have to be on a pusher system.
 
I just looked at ur pic, shroud and fan are worthless. The fan is sucking air from the sides of the shroud backwards from the engine compartment , fan don`t flow enough anyway !
I drove my 505" fastback a little yesterday , it got up to 208 in town , and cooled back off to 195 on the road , it was 96 in the shade and pretty humid .
How much room do u have between the pump and rad. ?
It’s definitely not doing it’s job. Going to follow see CCas’ advice this weekend if I have time and back-flush it just to see.
 
I just looked at ur pic, shroud and fan are worthless. The fan is sucking air from the sides of the shroud backwards from the engine compartment , fan don`t flow enough anyway !
I drove my 505" fastback a little yesterday , it got up to 208 in town , and cooled back off to 195 on the road , it was 96 in the shade and pretty humid .
How much room do u have between the pump and rad. ?

Yes, there's just so many things wrong, it's no wonder it's running hot. No offense meant to the OP. That's why he's here trying to get help.

MY plan of attack.....because I'm CHEAP would be to fix all the "other stuff" we talked about besides the radiator first. BUT in the end, I think that will be the best thing to replace. Even with mismatched pulleys, it should flow better than "THAT". Plus, it it was a GOOD heat transfer unit, it would be cooling, good flow or not, IMO because there's "so much" coolant there. I know......good radiators are expensive........it sucks. I bought a scratch and dent Champion for my Valiant for 80 bucks shipped. It had like one flue bent. BENT and that's all. I got lucky though. It cools good. That's the problem with the chinkesium influx........sometimes you get good......sometimes you don't. That's why I recommend Griffin. If you stay with their universal fit and can fab a little, those are less expensive, but still great quality.
 
Your shroud is blocking off more of the radiator than it includes.
Rusty... Isn't it a bit early???:poke: :lol:

I think you meant that the shroud is NOT covering the rad. (being one of the anti shroud faction, I like that the shroud as is, NOT blocking air flow) my thing is that shrouds block airflow if they are not designed correctly.


It won’t let me post the video because it says it’s too large but here is a picture of the coolant flow at 190°

I would think that he rad should have more fluid in it. I have never seen a cross flow that didn't have fluid up to the top of the rad cap.
 
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Rusty... Isn't it a bit early???:poke: :lol:

I think you meant that the shroud in NOT covering the rad. (being one of the anti shroud faction, I like that the shroud as is, NOT blocking air flow) my thing is that shrouds block airflow if they are not designed correctly.




I would think that he rad should have more fluid in it. I have never seen a cross flow that didn't have fluid up to the top of the rad cap.
I took several ounces out just to be able to show the flow through the tubes.
 
Another question... Do you have room to use a mechanical fan?
 
I don't think my question ever got answered about when it is running hot. If the car is running hot in traffic but fine on the highway, then the radiator might be fine if you had a full shroud that covered the entire core and 2 good 12" fans.

On the other hand, if the car runs hot on the highway, then the shroud fan combo doesn't even matter. At that point, you have another issue of which different remedies have been offered in this topic.
 
I don't think my question ever got answered about when it is running hot. If the car is running hot in traffic but fine on the highway, then the radiator might be fine if you had a full shroud that covered the entire core and 2 good 12" fans.

On the other hand, if the car runs hot on the highway, then the shroud fan combo doesn't even matter. At that point, you have another issue of which different remedies have been offered in this topic.
It runs hot idling and driving. If I’m going down hill it will cool down to about 200
 
It runs hot idling and driving. If I’m going down hill it will cool down to about 200
ok, so no matter what you do to the fan and shroud combo, no matter how good, the coolest you'll run on the highway will be 200 with all else being the same.

So you have to look at all the suggestions offered like timing, new motor break in, radiator, clogged block, lean/rich carb, water pump, rear gear ratio etc if you want your highway temps to get down under 200. bear in mind, you don't need to solve all of the above. In fact, you'll probably only have to solve one or two of the above to get under 200.
 
is the width of the core of the radiator the same as the width of the opening in the radiator support?
 
ok, so no matter what you do to the fan and shroud combo, no matter how good, the coolest you'll run on the highway will be 200 with all else being the same.

So you have to look at all the suggestions offered like timing, new motor break in, radiator, clogged block, lean/rich carb, water pump, rear gear ratio etc if you want your highway temps to get down under 200. bear in mind, you don't need to solve all of the above. In fact, you'll probably only have to solve one or two of the above to get under 200.
 
ok, so no matter what you do to the fan and shroud combo, no matter how good, the coolest you'll run on the highway will be 200 with all else being the same.

So you have to look at all the suggestions offered like timing, new motor break in, radiator, clogged block, lean/rich carb, water pump, rear gear ratio etc if you want your highway temps to get down under 200. bear in mind, you don't need to solve all of the above. In fact, you'll probably only have to solve one or two of the above to get under 200.
I’d be happy with that
 
No actually it’s a much older one. About 10 years but with very little miles

If u have to change radiators, I would recommend a GRIFFIN CROSSFLOW. I have a28x19 in my 68 fastback 440/505 , it has more room then u say u do in urs. If I had to do it over, I`d go one size wider , even to the point of notching the frame side flaps a little .
I didn`t even trim the cradle out to expose the tanks, the core is the same width as the stock form. S opening at 22" wide. Have often wondered wheather trimming the opening to expose the tanks would be beneficial and how much------
Make sure ur rad. is somewhat sealed to the cradle , so air wont go between them. I would be real surprised if u couldn`t find a mech fan that would fit !
 
If u have to change radiators, I would recommend a GRIFFIN CROSSFLOW. I have a28x19 in my 68 fastback 440/505 , it has more room then u say u do in urs. If I had to do it over, I`d go one size wider , even to the point of notching the frame side flaps a little .
I didn`t even trim the cradle out to expose the tanks, the core is the same width as the stock form. S opening at 22" wide. Have often wondered wheather trimming the opening to expose the tanks would be beneficial and how much------
Make sure ur rad. is somewhat sealed to the cradle , so air wont go between them. I would be real surprised if u couldn`t find a mech fan that would fit !
Thanks. I am looking at the griffin fans now. Going to measure my clearance today.
 
If u have to change radiators, I would recommend a GRIFFIN CROSSFLOW. I have a28x19 in my 68 fastback 440/505 , it has more room then u say u do in urs. If I had to do it over, I`d go one size wider , even to the point of notching the frame side flaps a little .
I didn`t even trim the cradle out to expose the tanks, the core is the same width as the stock form. S opening at 22" wide. Have often wondered wheather trimming the opening to expose the tanks would be beneficial and how much------
Make sure ur rad. is somewhat sealed to the cradle , so air wont go between them. I would be real surprised if u couldn`t find a mech fan that would fit !
What fan set up are you running with your griffin???
 
New griffin radiator is on the way. One thing I’ve noticed is that the core support on the right side has some concave characteristics to it causing the radiator to be leaned back about an inch and a half. I’m going to straighten that core support out before installing the new radiator and that should give me another inch and a half of room between the electric fan and the water pump pulley as well as sealing off the radiator against the core support
 
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New griffin radiator is on the way. One thing I’ve noticed is that the core support on the right side has some concave characteristics to it causing the radiator to be leaned back about an inch and a half. I’m going to straighten that core support out before installing the new radiator and that should give me another inch and a half of room between the electric fan and the water pump pulley as well as sealing off the radiator against the core support

Sorry , I have been off line for a while. I tried about everything under the sun fan wise , have a few setting on the bench/elec. and clutch type , even have one of the 2 5/8" tall jaguar clutches,new. I settled on a 17'' mech fan for now , w/ a 14" elec. booster in front/mounted as far from the rad. as possible . I could probly go to an 18" fan w/ a little work to the shroud , if need be .
 
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