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Downflow Crossflow, what is the difference?

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Old Aug 12, 2020 | 08:27 PM
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Question Downflow Crossflow, what is the difference?

What is the difference between a 'downflow' & 'crossflow' radiator?
I need to get a new radiator for my overhaul of my '78 F250's 460 with C6, & am not sure what this terminology means!
Any pointers/advice would be appreciated.
 
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Old Aug 12, 2020 | 08:39 PM
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Downflow means a top tank and a bottom tank. This is what our trucks have.

Crossflow means the tanks are on the sides of the radiator, like most newer vehicles.
 
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Old Aug 13, 2020 | 08:37 PM
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I read somewhere that 'crossflow' is more efficient/effective at cooling my large engine. Is that consistent with anyone else's experience?
I also heard/read recommended to have a 3 row of 1.5 inch tubes if possible. Does that sound like good advice?
 
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Old Aug 13, 2020 | 08:54 PM
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Originally Posted by sddaltongang
I read somewhere that 'crossflow' is more efficient/effective at cooling my large engine. Is that consistent with anyone else's experience?
I also heard/read recommended to have a 3 row of 1.5 inch tubes if possible. Does that sound like good advice?
Sounds right. Crossflows are the standard today I believe, and I've read that they are a superior design.
 
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Old Aug 13, 2020 | 09:18 PM
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Crossflow or no?

So a 'crossflow' would be OK to use in my 460?
 
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Old Aug 14, 2020 | 09:21 AM
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Cross flows were developed to accomodate lower front ends of modern cars. Not better, just different. I was running a "BeCool" crossflow radiator and switched to a larger more efficient downflow style they offer for higher powered engines.
 
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Old Aug 14, 2020 | 09:36 AM
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Originally Posted by beartracks
Cross flows were developed to accomodate lower front ends of modern cars. Not better, just different. I was running a "BeCool" crossflow radiator and switched to a larger more efficient downflow style they offer for higher powered engines.
Bingo. Not better, just different.

We have lots of room at the front of our trucks. The effects of downflow vs. crossflow are negligible. Downflow works just fine and is cheap
 
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Old Aug 14, 2020 | 09:42 AM
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Originally Posted by sddaltongang
What is the difference between a 'downflow' & 'crossflow' radiator?
I need to get a new radiator for my overhaul of my '78 F250's 460 with C6, & am not sure what this terminology means!
Any pointers/advice would be appreciated.
Your truck would have had a Super Cooler in it and that's just what I would put back in it.
 
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