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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 9:12â?¯AM warthodson--- via Healeys
> <healeys@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@autox.team.net> wrote:
>
>
> I live in the sunny South (90°F and 90% relative humidity today)
> and I used to refer to my BJ8â??s heater as the â??auxiliary engine
> coolerâ??; 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, NCÂ USA
>
>
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>
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<p>As the cores become denser, I wonder if the stock fan is able to
pull sufficient air through the radiator.<br>
</p>
<pre class="moz-signature" cols="72">Bob Haskell
Austin-Healey 3000 roadster registrar</pre>
<div class="moz-cite-prefix">On 7/11/23 12:40, Harold Manifold
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAFP1XCDcncxZvsHML4X-hOigL-eS7PEaUOftBTSGmxCcQmWbWw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Gary,
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>This website has a good overview:Â <a
href="https://usradiator.com/cores"; moz-do-not-send="true"
class="moz-txt-link-freetext">https://usradiator.com/cores</a></div>
<div><br>
</div>
<div>Harold</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Jul 11, 2023 at
9:12â?¯AM warthodson--- via Healeys <<a
href="mailto:healeys@autox.team.net"; moz-do-not-send="true"
class="moz-txt-link-freetext">healeys@autox.team.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div style="font-family:"Comic Sans
MS",sans-serif;font-size:16px">
<div dir="ltr">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.  </div>
<div dir="ltr">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?</div>
<div dir="ltr">Gary H</div>
<div><br>
</div>
</div>
<div
id="m_-2269323291578053413ydp70f1316yahoo_quoted_9797011705">
<div style="font-family:"Helvetica
Neue",Helvetica,Arial,sans-serif;font-size:13px;color:rgb(38,40,42)">
<div> On Monday, July 10, 2023 at 09:02:21 PM CDT,
BJ8Healeys via Healeys <<a
href="mailto:healeys@autox.team.net"; target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">healeys@autox.team.net</a>>
wrote: </div>
<div><br>
</div>
<div><br>
</div>
<div>
<div
id="m_-2269323291578053413ydp70f1316yiv6075989256">
<div>
<div>
<p><span style="color:rgb(31,73,125)">I live in
the sunny South (90</span><span
style="color:rgb(31,73,125)">°</span><span
style="color:rgb(31,73,125)"> F and 90%
relative
humidity today) and I used to refer to my
BJ8â??s heater as the â??auxiliary engine
coolerâ??; but I no longer have to use it
that way since I had a modern core
installed in the radiator and added a
190</span><span
style="color:rgb(31,73,125)">°</span><span
style="color:rgb(31,73,125)"> sleeved
thermostat that I bought from Kees.</span></p>
<p><span style="color:rgb(31,73,125)"> Â </span></p>
<p><span style="color:rgb(31,73,125)">Steve
Byers</span></p>
<p><span
style="color:rgb(31,73,125)">HBJ8L/36666</span></p>
<p><span style="color:rgb(31,73,125)">BJ8
Registry</span></p>
<p><span style="color:rgb(31,73,125)">AHCA
Delegate at Large</span></p>
<p><span style="color:rgb(31,73,125)">Havelock,
NCÂ USA</span></p>
<p><a shape="rect"
name="m_-2269323291578053413__MailEndCompose"
moz-do-not-send="true"><span
style="color:rgb(31,73,125)"> Â </span></a></p>
<div
id="m_-2269323291578053413ydp70f1316yiv6075989256yqt99156">
<div>
<div
style="border-right:none;border-bottom:none;border-left:none;border-top:1pt
solid rgb(181,196,223);padding:3pt 0in
0in">
<p><br>
</p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
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</blockquote>
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<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre"
wrap="">_______________________________________________
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/pipermail/healeys";>http://www.team.net/pipermail/healeys</a>
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