[Healeys] Heater query

[Bob Haskell]

As the cores become denser, I wonder if the stock fan is able to pull 
sufficient air through the radiator.

Bob Haskell
Austin-Healey 3000 roadster registrar

On 7/11/23 12:40, Harold Manifold wrote:
> Gary,
>
> I had the same options when restoring my Mk1 BT7. I looked into 
> aluminum radiators extensively to see what the benefits might be. 
> Contrary to popular belief it is not better heat transfer properties 
> of the materials. The copper radiator fins on the original Healey 
> radiators have much better thermal conductivity than aluminum. The 
> advantage of the aluminum radiator is the manufacturing process and 
> the formability of modern aluminum. The result is more tube and fin 
> area. I estimated a Wizard radiator has about 25% more fin area than 
> the stock radiator. The greater the fin area the better to expel heat.
>
> Having said that, there is a third option which is to replace the 
> original core with a high efficiency core. This retains the stock look 
> of the engine bay and will be close in performance to the aluminum 
> radiator. The high efficiency core option will be more expensive than 
> a Wizard radiator and the difficulty is finding a radiator shop that 
> can access the core can do the work.
>
> This website has a good overview: https://usradiator.com/cores
>
> Harold
>
>
>
>
>
> On Tue, Jul 11, 2023 at 9:12 AM warthodson--- via Healeys 
> <healeys at autox.team.net> wrote:
>
>     My 100 radiator is in need of some rehabilitation. It either needs
>     to be boiled out, which would not replace some of the damaged
>     fins, or re-cored. I am leaning toward re-coring but that would be
>     more expensive, which leads to the aluminum option.
>     Besides price what are the pros vs. cons of these options? Does
>     anyone know if re-cored 100 radiator is more efficient than an
>     aluminum radiator?
>     Gary H
>
>     On Monday, July 10, 2023 at 09:02:21 PM CDT, BJ8Healeys via
>     Healeys <healeys at autox.team.net> wrote:
>
>
>     I live in the sunny South (90°F and 90% relative humidity today)
>     and I used to refer to my BJ8’s heater as the “auxiliary engine
>     cooler”; but I no longer have to use  it that way since I had a
>     modern core installed in the radiator and added a 190°sleeved
>     thermostat that I bought from Kees.
>
>     Steve Byers
>
>     HBJ8L/36666
>
>     BJ8 Registry
>
>     AHCA Delegate at Large
>
>     Havelock, NC  USA
>
>
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