Really big radiator
12-20-09, 12:14 PM
#1
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Really big radiator
Does anyone use a big NASCAR style radiator in there FD. I can get a 4 to 6 inch thick radiator that come out of stock cars really cheap. They go for around 700 new and nothing is wrong with them. I know during the summer alot of people have trouble with running hot so I would think somebody has tried this. I have looked and it seems like it would be easy to make them fit. What do you guys think?
12-20-09, 02:58 PM
#2
My personal feeling is that it might be too thick. The radiator needs air flow to cool the coolant/water running through it. On a core that thick, air flow might be a bit more difficult to accomplish - especially at low speeds.
Most people these days have cooling under control. A regular Fluidyne or Koyo works great provided its ducted/sealed and the rest of the cooling system is in good shape and there isn't any air in the system.
Do some further research in the cooling system threads in the FAQ thread. Lots of good info in there.
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/faq-3rd-gen-other-useful-links-68640/
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/big-fat-fd3s-cooling-thread-571088/
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/cooling-system-flush-info-441967/
Most people these days have cooling under control. A regular Fluidyne or Koyo works great provided its ducted/sealed and the rest of the cooling system is in good shape and there isn't any air in the system.
Do some further research in the cooling system threads in the FAQ thread. Lots of good info in there.
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/faq-3rd-gen-other-useful-links-68640/
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/big-fat-fd3s-cooling-thread-571088/
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/cooling-system-flush-info-441967/
12-20-09, 05:40 PM
#3
Constant threat
I'd have to second the thought of it being too thick for the application.
I had a custom 4" thick unit built for my Suburban and I was surprised at how much the airflow thru it was reduced compared to the 2.5" stock unit.
I had a custom 4" thick unit built for my Suburban and I was surprised at how much the airflow thru it was reduced compared to the 2.5" stock unit.
12-20-09, 08:13 PM
#5
Does anyone use a big NASCAR style radiator in there FD. I can get a 4 to 6 inch thick radiator that come out of stock cars really cheap. They go for around 700 new and nothing is wrong with them. I know during the summer alot of people have trouble with running hot so I would think somebody has tried this. I have looked and it seems like it would be easy to make them fit. What do you guys think?
I would stick with an FD-sized radiator. They mount nicely, provide appropriate cooling for street to track applications, and even have resale value.
Dave
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