Down flow versus cross flow radiator? (Suits you)

In a down-flow radiator you have a tank attached to the top and bottom of the radiator core. The coolant enters the top tank and flows down to the bottom tank. As you’ve probably guessed by now, a cross-flow radiator has tanks on the left and right side. Coolant enters one side and flows across to the other.

  • Downflow radiators are usually taller and narrower. Crossflow radiators are usually shorter and wider. Even if it fits, converting from one radiator type to another will require some custom fabrication.

What is the advantage of a cross flow radiator?

Crossflow radiators have several advantages: They remove more heat. They usually have a larger core area. Fluid flows slower through the core and spends more time in the air stream.

How does a crossflow radiator work?

On a cross flow radiator, the fluid is moved across the core from the right side to the left side. On this type of radiator, the radiator cap can be placed on the low pressure side of the tank. This reduces the pressure on the cap when you are running at high RPMs.

What are the two types of radiator designs?

The two basic designs of radiators include: Down-flow radiators. This design was used mostly in older vehicles, where the coolant entered the radiator at the top and flowed downward, exiting the radiator at the bottom. Cross-flow radiators.

Where are the tanks on the down-flow radiator?

Downflow radiators have the tanks located at the top and bottom of the radiator’s core. The coolant enters through the top tank and flows down through the core with the help of gravity easing the work load of the water pump as the coolant returns to the engine.

What is down flow radiator?

In a down-flow radiator you have a tank attached to the top and bottom of the radiator core. The coolant enters the top tank and flows down to the bottom tank. As you’ve probably guessed by now, a cross-flow radiator has tanks on the left and right side. Coolant enters one side and flows across to the other.

What is a double bypass radiator?

The job of a radiator is to remove as much heat from the hot engine coolant as possible. Single pass radiators provide a flow of coolant through the radiator one time. Double pass radiators do it twice by looping the coolant path back to the inlet side of the tank.

What is cross flow heat exchanger?

A cross-flow heat exchanger exchanges thermal energy from one airstream to another in an air handling unit (AHU). A cross-flow heat exchanger is used in a cooling and ventilation system that requires heat to be transferred from one airstream to another.

What is the radiator cap?

A radiator cap keeps the cooling system pressured which raises the boiling point. The radiator cap also has a vacuum valve that allows coolant to flow from the reservoir tank to the radiator during cool down. When the coolant temperature drops, the coolant will contract and create a vacuum.

What is the purpose of the water pump?

A water pump is a vital part of your car, truck or SUV’s cooling system. Its main purpose is to continually circulate coolant from the radiator to the vehicle’s engine block to prevent overheating.

What are the three types of radiators?

Radiator Types

  • Single Panel Radiators.
  • Double Panel Radiators.
  • Horizontal Radiators.
  • Vertical Radiators.
  • Column Radiators.
  • Heated Towel Rails.

Which one is the type of radiator?

Radiators are classified according to the direction of the water flow through them. In some, the water flows from top to bottom-down flow type radiator. In other, the water flows horizontally from an input tank on one side to another tank on the other side-cross flow type radiator.

How many types of radiators are there?

Central, electric, or dual? There are two main types of radiator. In your home you should have one of the following: Central heating – The central heating radiator is the most common.

What are the symptoms of a failing water pump?

Five Signs Your Water Pump Is Failing

  • Overheating. A dead or dying water pump cannot circulate coolant through your vehicle’s engine and, as such, the engine will overheat.
  • Coolant Leaks. Coolant leaks from the water pump are common and a clear sign that it’s time to replace the pump.
  • Corroded Water Pump.
  • Whining Noises.

What function does the heater core serve?

The heater core is a small radiator that warms the car’s cabin using hot coolant from the engine. The cooling system’s hoses circulate liquid coolant through the heater core as they do through the engine and large cooling radiator behind the vehicle’s grille.

What is the function of a thermostat?

The thermostat is like a valve that opens and closes as a function of its temperature. The thermostat isolates the engine from the radiator until it has reached a certain minimum temperature. Without a thermostat, the engine would always lose heat to the radiator and take longer to warm up.

Down-flow Radiator vs. Cross-flow Radiator: What is the Difference? * C, G, & J Inc

People commonly inquire as to whether a cross-flow or down-flow radiator will provide greater cooling for their car. The answer is very straightforward, but in order to dispel any ambiguity, let’s take a look at the primary components that influence radiator cooling. In order for a radiator to cool effectively, a variety of elements must be taken into consideration. Materials, procedures, and design all play a part in the construction process. Despite the fact that we will not cover all the many features of radiator design, we must examine how a radiator functions.

Thermal conduction occurs as heat is transmitted to the tube walls and dissipated by the radiator fins as it passes through the tubes.

Because this is the way all radiators operate, why are there two alternative flow types available?

Down-flow and Cross-flow Radiator Construction

The procedure for constructing any of these radiators is the same as the other. The only change is the location of the tanks’ attachments. Using a down-flow radiator, you will have a tank that is attached to both the top and bottom of the radiator core. The coolant enters the top tank and then flows downward to the bottom tank, where it is collected. In case you haven’t figured it now, a cross-flow radiator contains tanks on both the left and right sides of the radiator. Flowing coolant enters from one side and exits from the other side.

Which Cools Better?

When using a cross-flow and a down-flow radiator that are constructed from the same materials and using the same construction procedures, they will deliver the same level of cooling. So, what’s the difference between the two? It all boils down to how much room is available beneath the hood. Depending on your vehicle or equipment, you may be able to use a bigger cross-flow radiator instead of a down-flow radiator to achieve the desired results. This goes back to the concept of surface area. If the two radiators are of the same size, they will provide the same amount of cooling.

The choice of which radiator to employ is mostly determined by the available area.

Multiple Pass Radiators

If you have a limited amount of space or want more cooling, there are radiators that will circulate the coolant through the core two or more times for you. In most cases, only double pass radiators will be found. Baffles are installed within the tanks in this situation, forcing the coolant to circulate twice through the center of the tank. Because the same quantity of coolant flows across twice as much surface area, it has more time to cool as a result of this.

Depending on the application, a triple pass radiator may even be required. You should, when in doubt, replace your old radiator with one that at the very least meets OEM standards; but, if more cooling is required, a double or triple pass radiator may be beneficial.

Pressure Cap Location

Cross-flow radiators have one benefit over down-flow radiators, and that is the position of the pressure cap in relation to the flow direction. The use of a pressure cap on all radiators is required in order to avoid damage to the cooling system when the coolant warms up. Due to the nature of down-flow radiators, this cap must be installed on the top tank, putting it on the ‘high pressure’ side of the radiator and forcing the pressure cap to vent sooner. Cross-flow radiators can have the pressurecap installed on the second tank, which is where the coolant exits the radiator, putting the cap on the ‘low pressure’ side of the radiator.

That being said, the difference is not that significant and can only be beneficial in high-performance applications such as racing, where it can be advantageous.


The amount of surface area that a radiator has has the greatest impact on its cooling effectiveness. Because there is no difference in cooling capabilities between down-flow and cross-flow radiators made of the same materials and dimensions, you should select the one that is most appropriate for your car. There is no need to spend money on expensive adaptations to accommodate a new flowstyle. In some cases, a double or triple pass radiator may be beneficial in terms of improving cooling capacity.

If you have any queries about your radiator requirements, please do not hesitate to contact us at 1-800-223-4299.

Downflow Radiators vs. Crossflow Radiators. What’s the Difference?

Radiators are available in a number of different configurations. Each one possesses a one-of-a-kind combination of fittings and characteristics that are tailored to the specific vehicle for which they were designed. There is a significant variation in radiator designs, and it has nothing to do with the engine they are designed for or even the heat dissipation capability they have. Instead, it has everything to do with the placement of the tanks and how the radiator is mounted in a vehicle. Crossflow radiators, which have the tanks on either side of the core with the radiator tubes running horizontally, and Downflow radiators, which have the tanks on top and bottom of the core with the radiator tubes running vertically, are the two most common configurations and can be divided into two categories.

  • Alternatively, ‘Will a crossflow provide better cooling?’ The simplest method to answer the question ‘Which Cools Better?’ is to first consider the architecture of a radiator and how it functions.
  • While the coolant is contained inside the tubes of the core, the heat generated by the coolant is transferred to the tube wall and the fins of the core.
  • The greater the surface area of a radiator’s tube, the better the radiator’s ability to disperse heat and cool.
  • The amount of space available under the hood will be the most important aspect in determining whether a downflow radiator or a crossflow radiator is best for your car.
  • In older vehicles, they were the usual radiator arrangement.
  • Crossflow radiators are the polar opposite of conventional radiators; they are often broader than they are tall, making them ideal for vehicles with low profile hoods and limited vertical space.
  • Check out our future post, DoubleTriple Pass Radiators, to learn more about Crossflow Pass Systems in greater depth.
  • When it comes to deciding which arrangement to use, the most important considerations are surface area and available space.

If one of the alternatives is a larger radiator with a greater surface area of the core exposed, then that option will give a cooling boost in comparison to the other.

Differences Between Downflow and Crossflow Radiators

Radiators are available in two basic forms, which differ in order to accommodate the available space, increase mounting stiffness, and provide a variety of intake and output positions. Downflow and crossflow radiator designs are the two most often utilized types of radiators. Each design has its own set of pros and cons, which we’ll go over in greater depth later on in this article. What is the operation of a downflow radiator? Downflow radiators are distinguished by the fact that their tanks are situated at the top and bottom of the radiator’s core.

  1. This form is particularly well suited to early automobiles and trucks, which had a tall but narrow width grille and radiator support.
  2. The downflowradiator also has the benefit of being able to customize the location of the inlet and output.
  3. If you are upgrading to a newer engine or switching engine families, the only adjustment you will need to do is moving the outlets.
  4. The downside of using a downflow radiator is the positioning of the radiator cap.
  5. The necessity for the cap to vent excess pressure is considerably increased as a result of this.
  6. This is owing to the placement of the cap and the severe agitation of the coolant at the input.
  7. Radiator caps in the range of 15 to 25 psi are commonly used with downflow radiators.
See also:  2010 Ford F150 5.4L V-8 Firing Order? (Suits you)

What Are the Advantages of Using a Crossflow Heat Exchanger?

Coolant enters the radiator from one side, and the water pump propels the coolant through the core and out the other side of the radiator on its way back to the engine, which is located on the other side.

This diagram depicts the coolant path of a standard crossflow radiator design.

By using a crossflow design, the radiator cap may be placed on the low pressure (suction) side of the system, allowing for the use of lower pressure radiator caps, such as those ranging from 7 to 20 pounds per square inch.

Due to decreased coolant agitation within the low pressure tank, this has occurred.

A high pressure radiator cap between 22 psi and 32 psi is recommended for circular track racing applications with enhanced cooling system demand.

Is A Double Pass Radiator a Better Choice?

In a typical double pass radiator, the coolant is routed through the radiator core twice.Crossflow radiators are also available in double pass and triple pass configurations.

To understand more about double and triple pass radiators, we’ve written an essay entitledSingle Pass, Double Pass, Triple Pass Radiators; What’s the Difference?, which you can find right here on The Toolbox.

Related Articles to Assist You in Making Your Product Selection Radiators and Cooling System Components are available for purchase.

What’s the Difference Between Cross-Flow and Down-Flow Radiators?

It’s summer, and temperatures are rising across the country. Many of you have cooling-related queries, therefore CSF partnered with to provide answers to a list of questions about optimal car cooling that were submitted by the millions of Speedhunters readers across the world. What is the difference between a down-flow radiator and a cross-flow radiator? Have you ever wondered what the difference is? We’re here to assist you! The Honda Civic radiator manufactured by CSF is seen first in the photo above (CSF2858).

The difference between Cross-flow radiators and down-flow Radiators

In the heating industry, a horizontally cored radiator is referred to as a cross-flow radiator, whereas a vertically cored radiator is known as a down-flow radiator. If all of the variables stay constant, there is no difference between these radiators. Vehicle manufacturers choose the type of radiator core that will be used on a given application based on the space constraints (length and height) as well as the location of the inlet and outlet connections that they desire. Changing a down-flow radiator’s design to a cross-flow radiator’s design would most certainly have an adverse effect on the performance of the radiator if the radiator is longer (length) than it is higher (height).

This more effectively transfers excess heat from coolant to air before leaving the radiator.

Have More Cooling Questions?

Fortunately, we addressed a variety of other issues in the whole piece with our friends at SpeedHunters. For more information, please see the link provided below.

Downflow or Crossflow

In a confined engine compartment, an aftermarket shroud / fan assembly can allow a fan to operate at maximum efficiency while also sealing off the remainder of the core area. A downflow radiator is comprised of two horizontal tanks, one at the top and one at the bottom. In order for hot coolant to escape from the engine, it must first enter the top tank and then move downward to the bottom tank through tube passageways in the core, propelled by the water pump and assisted by gravity. Fins give increased surface area for heat transmission to the environment when coolant is running through the core at various points along the process.

  • The coolant moves as it is pushed along by the pump from the high-pressure (entry) tank, where it gets coolant from the engine, through the core, and out to the low-pressure (exit) tank, where it returns to the engine for recirculation.
  • An engineer would often choose between a crossflow and a downflow radiator depending on the limits of the engine bay’s packing.
  • In practice, however, this is not the case.
  • A downflow, on the other hand, may be the sole option if the car owner is looking for a more authentic, nostalgic appearance.

Increased core surface area is achieved by the use of imagination and innovation. On the other hand, in many circumstances, a downflow style may actually be more effective at transferring heat than a crossflow approach.

The Bottom Line

It is preferable to utilize what is most appropriate for the situation, always ensuring that you maximize the amount of available space in terms of radiator core surface area. Ensure sufficient airflow, use of a suitably shrouded fan, use of an efficient water pump, obstruction-free block coolant channels, and the use of an appropriate thermostat are all factors that must be taken into account.

‘Single, Dual or Triple Pass?’

Overall, both downflow and cross-flow offer benefits in some situations when all factors are considered. Cross-flow radiators have only recently gained popularity as automobile designers have lowered the frontal area of their vehicles, necessitating the use of shorter, broader radiators. In an engine conversion situation, if you want the coolant system to perform correctly in the widest possible range of applications, you should try to duplicate, as closely as possible, the arrangement the engine had in its OEM configuration in terms of coolant capacity, radiator surface area, and air-flow requirements, in order to avoid any potential problems (including fan size and efficiency).

My metal cross-flow fits perfectly between the fender wells and operates at whatever temperature the thermostat is set at.

Users who are viewing this thread

  • Cookie technology is used on this site to help you personalize the material you see, customise your experience, and keep you signed in if you have registered on it. The use of cookies on this site is subject to your permission if you continue to use it.

Crossflow Vs Downflow Radiator Recipes with ingredients,nutritions,instructions and related recipes

2012-04-22 January 5, 2007 (Monday, April 22nd). 3. In a cross flow radiator, the thre cap is installed at the lowest pressure point of the system (after the radiator core, on the suction side of the radiator). There have been 9 user interactions. The estimated reading time is 4 minutes.


2017-05-17· There are two types of car radiators available: down flow radiators and cross flow radiators. The names are derived from the manner in which the coolant passes through the radiator core. Reading Time Estimated at 4 minutes


In other words, if you have both downflow and crossflow radiators that are constructed from the same materials, employing the same construction methods, and having the same core dimensions, they will deliver the same degree of cooling, regardless of their design. 2016-04-01

See also:  2010 Ford Escape Relay Locations? (Correct answer)

Cross Flow vs. Down Flow on November 3, 2007 The most significant benefit of one over the other is packaging. Vertical cores position the tanks at the top and bottom of the radiator, resulting in a higher radiator. This is suitable for a large number of vintage automobiles with narrow, tall grilles. As a result, cross flow radiators are more practicable in today’s automobiles, which have more space from side to side. One feature of the that is favorable. In this article from, the number of interactions with users is nine.


2008-07-17· Cross flow radiators outperform upright radiators in that the radiator cap is located on the low pressure (suction) side of the system, rather than the high pressure (convection) side. When a high-flow water pump is used, the pressure exerted by the pump prevents coolant from being forced past the radiator cap at high RPM.

As previously indicated in the section on radiator caps, an upright radiator should be supplied with a radiator cap that has the. Number of user interactions2Estimated reading time1 minute


On the 14th of September, 2016, downflow radiators have the tanks situated at the top and bottom of the radiator’s core, respectively. As the coolant returns to the engine, it enters from the top tank and runs down through the core with the assistance of gravity, reducing the workload placed on the water pump. This form is particularly well suited to early automobiles and trucks, which had a tall but narrow width grille and radiator support. Reading Time Estimated at 3 minutes


2020-04-23· Downflow radiators are often higher and narrower than upflow radiators. Crossflow radiators are often shorter and broader than conventional radiators. Converting from one radiator type to another will involve some unique manufacturing, even if it is possible. For the vast majority of automobiles, the most straightforward approach is to keep the original radiator type. When it comes to cooling capacity, downflow radiators are limited in their ability to function. … 2 minutes is the estimated reading time.


Cross-flow radiators have one benefit over down-flow radiators, and that is the position of the pressure cap in relation to the flow direction. All radiators are equipped with a pressure cap to protect the cooling system from harm when the coolant warms up. Down-flow radiators necessitate the installation of this cap on the top tank, which places it on the ‘high pressure’ side of the tank and causes the pressure cap to vent sooner. Cross-flowing. Reading Time Estimated at 4 minutes


Crossflow radiators versus downflow radiators (2008-05-05). Jump to the most recent version of this page 1 – 9 of 9 Posts are being followed. SAC69. Please correct me if I am incorrect, but I seem to recall that you could get a cross-flow radiator from a Torino that would fit a 1969 to 1973 Mustang. Those were significantly less expensive at one point, but you may not be able to get a better deal at current moment. If you happen to find yourself in a fair. Estimated Reading Time3 minutes8 users interacted with the page


A cross flow radiator performs somewhat worse than a dual pass radiator due to the fact that the waterflow through the tubes is half the speed of the dual pass radiator. When using a dual pass radiator, the water passes through six parallel tubes before returning to the same six tubes. To put it another way, the two sets of six parallel tubes are connected in series with one another. Dual pass vs crossflow port flow orientation is discussed in detail below. For the sake of this discussion.


Is there a debate on whether radiator is more effective? I’m looking to purchase an aluminum radiator for my 1967 Fairlane convertible. The 390 is almost completely stock, but it still gets hot on the idle. I am a member of


December 2006 (2009-07-07) Location: Southern California. Number of posts: 920. One advantage of a cross-flow radiator is that the cap is located on the cooler low pressure side of the radiator, as opposed to a down-flow radiator, which has the cap located at the top of the radiator on the hot side of the radiator.

This makes the task of the radiator cap much easier, and it allows you to make greater use of a coolant recovery system as a result.


December 2006 (2009-07-07), In Southern California, there are 920 posts. In comparison to downflow radiators, which have their caps at the very top of the radiator on the hot side of the radiator, crossflow radiators have their caps on the cooler low pressure side of the radiator. In addition, it makes it easier to use a coolant recovery system because the radiator cap has less work to do.


Use my linkor text JayzTwoCents to 500-500 to receive a free book as well as a 30-day free trial membership. Members of the Amazon Prime program who join up.


Crossflow radiators versus downflow radiators (2009-10-07). I created my own custom radiator because the way my turbo is configured does not allow me to utilize a factory radiator. Some people have told me that the crossflow radiator will cause the radiador to not flow properly. Is this accurate, or will the crossflow radiator be fine for me to use?


2018-03-12 Crossflow shell and tube heat exchangers are used in crossflow applications. A crossflow heat exchanger is built such that the two fluids flow perpendicular to one another in order to maximize heat transfer efficiency. For example, when one fluid is a liquid and the other is a gas, this is commonly used in a vehicle radiator, which is cooled by hot water flowing left and right as well as by air moving up and down, respectively. Bright Hub Engineering may be found at


The advantages and disadvantages of a cross flow radiator over a downflow radiator. However, even though the original 307 had a cross flow, the lm7 also features one. But having a downflow radiator to help route all of the aforementioned tubing/hosing would make my job a whole lot easier, wouldn’t it? Would a downflow be effective in cooling a warmed-over lm7? More images can be seen at the Stovebolt Gallery. 1951 General Motors 9430 1.


Here’s what I thought about the radiator. When compared to the ordinary flow, it appears that you suffer just a minor performance impact. I own a 240GTS (regular) and am really pleased with its overall performance. In my view, if the x-flow rad enhances the performance of your tubing runs, then go ahead and purchase it. If not, look to ExtremeRigs to see how the cross flow rad performs in comparison to other rads you’re thinking about purchasing or renting. For example, it’s very likely still there.


2017-04-23· Given that cross flow radiators are broader than down flow radiators, they are more difficult to install into cars that have had their engines modified. It is difficult for folks to clean their sophisticated coolant flow because of its complexity. The fact that the vertical flow radiator has a greater coolant capacity than the cross flow radiator is also vital to grasp. The cross flow radiator must be placed at a critical location.


The question is whether to cross-flow or not to cross-flow.

-­- You have the ability to make a difference: Make a donation of any amount to t.


2010-01-26· The Crossflow Heat Exchanger is a device that transfers heat between two different directions. Crossflow heat exchangers are found in a variety of applications, including automobile radiators and air conditioner evaporator coils. In both instances. The transfer of heat occurs between a liquid flowing within a tube or tubes and air passing through the tube or tubes is called convection. The heated water in the tubes of a car radiator is cooled by air moving through the radiator between the cylinders of the vehicle.


Crossflow radiator and fan, dual-row automatic transmission, aluminum, natural, crossflow radiator and fan Each one is 28.00 inches wide, 18.62 inches high, and 3.0 inches thick. GRI-CU-70013 from is the part number.


2018-04-26· Has anyone tried swapping a downflow radiator for a crossflow unit in a box sprite chassis yet? I recently purchased a low-cost aluminum crossflow device, and I’m now contemplating how to install it. Any suggestions? I’m debating whether or not to replace the radiator shroud with one from a later sprite or whether or not to simply create my own mounting brackets. any, according to


Cross-Flow Radiators – Single-Pass or Double-Pass. Posted on August 5, 2002. Jump to the most recent version of this page 1 – 4 of 4 posts are being followed. R. randii is a species of rat. Regardless of whether you prefer crossflow or downflow, my setup DEFINITELY necessitates a crossflow radiator because there is far more room on the sides for tanks than there is at the top or the bottom, and with such a small hole, I’m unwilling to give up any space for the actual core of the computer.

See also:  AC Compressor Noise? (The answer is found)

Crossflow vs downflow on November 16, 2003 Username: Do you remember who I am? Password: Register: FAQ: What are the rules of the forum? Search: Posts for today include: Mark Forums Read: Thank you for coming as a guest visitor! Please register; it is completely free and entertaining to participate! These forums are for anyone who want to learn how to overclock and tune their computer’s components, such as the CPU, RAM, and graphics card.


2018-03-29· Figure 9 shows the difference between a crossflow and a counterflow cooling tower. Drafting under duress: Their cooling tower is equipped with a blower-type fan located at the entry, which creates high velocity at the input and low velocity at the output. It has the potential to produce air circulations at the outlet. Another downside of this method is that it requires significantly more horse power than a draft type system. The system’s main benefit is that it is scalable.

Down flow versus cross flow radiator

There are two types of car radiators available: down flow radiators and cross flow radiators. The names are derived from the manner in which the coolant passes through the radiator core tubes. Down flow radiators rely on gravity to carry coolant from the top tank to the bottom tanks, whereas cross flow radiators rely on the fluid’s ability to seek its own level to move coolant from one tank to the next.

A cross flow radiator in its most basic form Radiators with a typical downward or vertical flow

Read more: Down flow versus cross flow radiator? (Suits you)

Radiator construction

Older radiators were constructed with a copper inlet and outlet tank, as well as a core made of either copper or aluminum. The majority of current radiators, on the other hand, are constructed of plastic tanks with an aluminum core. Tanks are connected together by thin tubes that transfer coolant from one to the other. In the gap between the tubes, folded fins aid to transmit coolant heat from the tubes to the air that passes through the radiator core, which helps to reduce the amount of heat loss.

Radiator cap placement

When the pressure cap is situated on the radiator, the design is called for. The intake tank is filled with hot high pressure coolant, which then travels via the tubes to the output tank. Airflow through the tubes cools the coolant, lowering the temperature as well as the pressure in the system. Because the radiator cap is located on the outlet tank, high RPMs will not result in a pressure release; hence, the cap must always be located on the top tank (high pressure) in a down flow radiator. The cap on a cross flow radiator, on the other hand, might be situated on the suction or low pressure side of the radiator, in the opposite direction of the upper radiator line.

Advantages of Cross Flow Radiator

Modern automobiles, especially those with aerodynamically curved hoods, simply do not have the space to fit a tall down-flow radiator. Thus, cross flow radiators are employed to satisfy the body design requirements. In comparison to a down flow radiator of same size, they’re shorter but broader. In this configuration, the design prevents premature pressure cap opening caused by a high flow water pump operating at a high engine rpms due to the pressure cap being situated on the low pressure tank.

In order for the cross flow radiator to be self bleeding, it must be installed so that the pressure cap is higher than the engine’s pressure cap.

Disadvantages of Cross Flow Radiator

Because of its large breadth, a cross flow radiator is more difficult to install into an engine compartment than other types of radiators. Ensure that sufficient outside air enters the grille region and spreads to the extreme ends of a cross flow radiator by following these design guidelines: Additionally, cross flow radiators often have less coolant capacity than down flow radiators, which is due to the lack of available space. A cross flow radiator takes up more area from side to side, whereas a vertical flow radiator takes up more room from top to bottom.

As a result of the increased temperature differential, joints on the radiator may fail, causing leaks or allowing air to enter the system.

Advantages of a down flow radiator

They have a smaller profile than a cross flow radiator of same size. If you have a limited amount of space in terms of breadth but plenty of height, a down flow radiator may be your best option.

Disadvantages of a down flow radiator

Aside from the fact that it is taller, the single most significant drawback of a down flow radiator is that the pressure cap is always situated on the top tank of the radiator. With the maximum internal pressure, this is the hottest section of the radiator and the most intense heat. In engines running at high revs per minute, the combination of high heat and high pressure can push the pressure cap to release, allowing pressure and coolant to flow into the recovery tank and into the exhaust system.

Rick Muscoplat posted a blog entry on

cross flow vs. up and down-aluminum radiators

  1. The aluminum readiator is something I’m thinking about, and I was wondering which would be the best choice. Please list the advantages and disadvantages. The up and down would be ideal for me because it would make dealing with the radiator hoses much easier, but it is not. Thank you for taking the time to read this. Lee

Summit provided me with a chibby one for my collection. I believe it cost $200, and it is enormous, and I have never had a problem with it overheating. As brackets were not included, I had a buddy attach them for me, and it is now ready to use. If you do acquire one from Jeg’s or Summit, don’t get the ferd one that they tell you to buy because they’re just for B|RB engines; instead, get the ferd one they tell you to get.

388dartWell-Known Member

Messages:542Likes Received:3 Date of joining: October 26, 2005 Time in your time zone: 5:34 p.m. They are also effective. The 19′ x 22′ does an excellent job of cooling my 388. Thank you very much, gentlemen. By the time I receive what I require from Promax, I will have run out of funds once more. For the time being, I suppose I’ll just have to leave well enough alone and see if I can work things out. Lee

daves66valiant68 Dart 340/727:66 Signet Vert 340/5spd: 68 D100

Messages:3,151Likes Received:1196 Date of joining: November 24, 2005 Location:SoCal Time in your time zone: 4:34 p.m. I’ve just placed an order with FBO for mine. Thank you for writing this post. I was torn on whether or not to address the radiator issue. Aluminum vs. Copper is a comparison. It was less expensive for me to get a new aluminum radiator from Don than it was for me to have another core installed in my existing radiator. However, while the ones from US Radiator are excellent, they cost over $500:sad: I’ll be satisfied with the FBO unit.

  1. My two cents In comparison to the cross flow rads, there is a difference between the up down rads.
  2. If a radiator support is broader than it is tall, you should use a cross flow configuration since the coolant will be in the rad cores for a longer period of time.
  3. There is no doubt that an alley rad will dissipate heat more quickly and efficiently than a copper/metal rad.
  4. Now you must decide whether or not you can modify the radiator support, what is the entire area you have to work with from side to side and up and down, and how thick of a radiator can be placed, since certain automobiles and trucks have limited room.
  5. IF you install an alley rad and your temperature drops by 20-30 degrees Fahrenheit, install a HOTTER thermostat.

Because you now have a very good running system and can rid your system of heat,by running an 185 degree themostat,rather than a 165 degree themostat,you can keep the coolant in the rad for longer for more cooling and keep the motor temperature at a better operating temp than before and be more consistent than before with a temperature that goes all over the With downflow, there will be more of a hot area just beneath the entrance, and less flow and cooling will radiate out from there as the flow rate decreases more.

redfastbackDon’t ask me. my garage is empty

Messages:3,604 Likes Received:13 Date of joining: April 17, 2006 Location:california Time in your time zone: 4:34 p.m. As a point of reference, they have a novel technique for downflow radiators. A double pass or triple pass is what it is called when it goes up and down twice or three times before it departs the building. I tend to disagree with the statement that aluminum is more efficient than copper or brass. Copper/brass has a thermal transfer rate that is double that of aluminum when both are heated to the same temperature (180 degrees).

Because copper is more thick than aluminum, it will store heat for a longer period of time and, therefore, will take a longer period of time to cool down completely.

The longer the water is left in the radiator, the more heat will be drawn out of the system (dissipated).

Aluminum is a more lightweight material for racing.

Because of the water flow, the electroysis of all the dissimilar metals that you are joining will be halted (copper, cast iron, aluminum, chrome, steel, etc.) check out the post with the id=’post-113871′ data-author=’moparlee’> Thank you, gentlemen; you’ve provided some useful information.

Leave a Comment

Your email address will not be published. Required fields are marked *