custom radiator sizing.
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From: CalIFOrnia
custom radiator sizing.
has anyone ever relocated their radiator to the rear? i know the honda scene (or really any other car) hasn't attempted this much but i've been having the urge to relocate my radiator to the rear bumper. main purpose is for custom header clearance and i'm not a fan of the funny fitment half rad...(full race exception.) my REAL question is, what OEM air cooled radiator is short and wide or who makes custom rads for track cars? too many questions right? 
thanks!
thanks!
Re: custom radiator sizing. (defnu)
Lets answer your questions with a question... 
What are you model honda are you thinking about putting this "custom" radiator in?
Relocating it to the back?? Im sure it can be done. Radiators need airflow, or a real good fan to compensate.
There are many options out there. Half size dual core like Koyo, Fluidyne, Mishimoto. But if your talking about putting it behind the bumper thats a total custom job.
Your header is your issue you might want to notch the from beam and weld in bent metal to put strength back in the beam. We discussed this issue with header clearance issues in one of the posts this week. Here is the link
https://honda-tech.com/zerothread?id=2368518
Modified by dirty19 at 4:35 PM 8/27/2008
What are you model honda are you thinking about putting this "custom" radiator in?
Relocating it to the back?? Im sure it can be done. Radiators need airflow, or a real good fan to compensate.
There are many options out there. Half size dual core like Koyo, Fluidyne, Mishimoto. But if your talking about putting it behind the bumper thats a total custom job.
Your header is your issue you might want to notch the from beam and weld in bent metal to put strength back in the beam. We discussed this issue with header clearance issues in one of the posts this week. Here is the link
https://honda-tech.com/zerothread?id=2368518
Modified by dirty19 at 4:35 PM 8/27/2008
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From: AZ, United States
Re: custom radiator sizing. (dirty19)
you need to benchmark a system to do this setup b/c just throwing some shat together will most likely lead to some catastrophic issues. Also, running a motor TOO COOL, can lead to problems. Thermal shock. Some people put these huge rads on there cars and dont need them actually causes the motor to wear out faster.
Toyota MR2s or Lotus Elise/exige would be a good cars to benchmark. old 91-95 MR2 N/A or Turbo as the Turbo cooling system is very robust and has been track tested on 300-500hp cars.. .
Other places to look. Off road vehicles tend to have radiators in rear.. . trucks and dune buggies mainly though.. .
Rad size
line size
# of bends in pipe and deg bend
water pump size and specs
System Surface Area
psi, flows and head pressures etc.. .
Crossflow or ____ flow radiator is best??... . . (I'm not sure what spec MR2 is)
Also benchmark trunk mounted INTERcoolers for installation & airflow ideas for the rad.
I use to own a MR2turbo and allways dreamed of a big trunk mount A/W setup for a GT35turbo. The rubber and steel piping that runs under the car also dissipates heat from system(not to mention more fluid) allowing for smaller radiator than you think to be used.
Most likely an OEM honda spec rad for whatever car you have could work with the correct water pump and pipes, mounting and airflow should work. The water pump being up for the task would be my number one concern.
To spec a water pump out from scratch takes quite a bit of effort. Just make sure your piping isnt too much longer than a MR2's piping and you should be good with a similar sized water pump. Not sure how to help you out if you need a pump bigger than a OEM or "already" available aftermarket pc.
research research research. It has most likely been done before.. .
Toyota MR2s or Lotus Elise/exige would be a good cars to benchmark. old 91-95 MR2 N/A or Turbo as the Turbo cooling system is very robust and has been track tested on 300-500hp cars.. .
Other places to look. Off road vehicles tend to have radiators in rear.. . trucks and dune buggies mainly though.. .
Rad size
line size
# of bends in pipe and deg bend
water pump size and specs
System Surface Area
psi, flows and head pressures etc.. .
Crossflow or ____ flow radiator is best??... . . (I'm not sure what spec MR2 is)
Also benchmark trunk mounted INTERcoolers for installation & airflow ideas for the rad.
I use to own a MR2turbo and allways dreamed of a big trunk mount A/W setup for a GT35turbo. The rubber and steel piping that runs under the car also dissipates heat from system(not to mention more fluid) allowing for smaller radiator than you think to be used.
Most likely an OEM honda spec rad for whatever car you have could work with the correct water pump and pipes, mounting and airflow should work. The water pump being up for the task would be my number one concern.
To spec a water pump out from scratch takes quite a bit of effort. Just make sure your piping isnt too much longer than a MR2's piping and you should be good with a similar sized water pump. Not sure how to help you out if you need a pump bigger than a OEM or "already" available aftermarket pc.
research research research. It has most likely been done before.. .
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From: CalIFOrnia
Re: custom radiator sizing. (defnu)
wow...thanks for the responses guys. well, i figure all the stock components should be sufficient enough. the diameter of the hose can be reduced past the firewall because the capacity of the hose would increase given more length. also, i've seen cars wired up to electrical thermostats that are pretty compact systems. also, the amount of travel the fuild would go through would increase, giving the coolant alot more surface for cooling...maybe? i don't know....we'll see. slim fans and venting i think would be the easiest part....i think. thanks again!
well, i figure all the stock components should be sufficient enough. the diameter of the hose can be reduced past the firewall because the capacity of the hose would increase given more length. also, i've seen cars wired up to electrical thermostats that are pretty compact systems. also, the amount of travel the fuild would go through would increase, giving the coolant alot more surface for cooling...maybe? i don't know....we'll see. slim fans and venting i think would be the easiest part....i think. thanks again!
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From: Sydney, NSW, Australia, australia
Something I have been working on....
Well some work was had this week. The car is comming together slowly but it is sick!
The boot mount rad set up. Man the rad is huge.
The cooler set up. Back door tanks, shorter plumbing and wiggings clamps ftw!
Dump pipe is done but has to be modded. Lowered slightly and shifted over so that I can fit my crank sensor bracket for the flywheel.
Next week we should have the rad fully fitted i.e the bottommounts done and the hoses finalised front to rear with the electric pump. The Dump will be sorted and the second cooler pipe done.
Well some work was had this week. The car is comming together slowly but it is sick!
The boot mount rad set up. Man the rad is huge.
The cooler set up. Back door tanks, shorter plumbing and wiggings clamps ftw!
Dump pipe is done but has to be modded. Lowered slightly and shifted over so that I can fit my crank sensor bracket for the flywheel.
Next week we should have the rad fully fitted i.e the bottommounts done and the hoses finalised front to rear with the electric pump. The Dump will be sorted and the second cooler pipe done.
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From: Sydney, NSW, Australia, australia
The pump is called a Davied Craig. It is controlled by either a EWP(electric water pump controller) or an out on my ecu.
http://www.daviescraig.com.au/...id=47
http://www.daviescraig.com.au/...id=47
Joined: May 2005
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From: LILBURN, GA, USA
Re: (dai-18t)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dai-18t »</TD></TR><TR><TD CLASS="quote">The pump is called a Davied Craig. It is controlled by either a EWP(electric water pump controller) or an out on my ecu.
</TD></TR></TABLE>
These are good pumps but the only downfall is that their life expectancy isnt that great. If correct its rated in hours. Another great opinion would be the Sweart EMP pump. It's a nice piece with a little longer life span.
As for custom radiators check out Saldana Racing Tanks! Great price & high quality!
</TD></TR></TABLE>
These are good pumps but the only downfall is that their life expectancy isnt that great. If correct its rated in hours. Another great opinion would be the Sweart EMP pump. It's a nice piece with a little longer life span.
As for custom radiators check out Saldana Racing Tanks! Great price & high quality!
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