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FWIW, I had my BJ8's manifold coated--by JetHot--during an overhaul and
didn't notice any difference in running temps.
On 7/21/2021 8:04 AM, Bruce Steele via Healeys wrote:
>
> Thanks, Alan. I had the exhaust manifold ceramic coated years ago.
>
> Bruce Steele
>
> Brea, CA
>
> 1960 BN7
>
> *From:*Alan Seigrist [mailto:healey.nut@gmail.com]
> *Sent:* Tuesday, July 20, 2021 8:32 PM
> *To:* Harold Manifold <manifold@telus.net>
> *Cc:* Kees Oudesluijs <coudesluijs@upcmail.nl>; Bruce Steele
> <healeybruce@roadrunner.com>; Austin Healey <Healeys@autox.team.net>
> *Subject:* Re: [Healeys] Auxiliary electric fan
>
> In 1991 bolt on cooling fans didn't have sufficient CFMs to be
> particularly effective, but worked well on the jags and MGs that had
> them simply because they designed the systems around the CFMs they
> could produce. In the last 10-15 years, the fans you can buy now can
> move a huge amount of air, so putting a pusher in front of the
> radiator is a viable option now.
>
> Although my view still remains to make sure the cooling system is
> sorted, suggest jet hot coating the exhaust header first, and go with
> a plastic 5 blade fan and use a 165 deg thermostat. If that still
> doesn't work then consider adding a fan.
>
> Cheers,
>
> Alan
>
> On Wed, Jul 21, 2021 at 1:11 AM Harold Manifold via Healeys
>
> Bruce,
>
> See this 1991 memo form Geoff Healey. An electric fan could worsen
> cooling problems if it doesnâ??t always draw ambient air.
>
> Harold
>
> *Sent: *Tuesday, July 20, 2021 7:23 AM
> *Subject: *Re: [Healeys] Auxiliary electric fan
>
> Always fit a thermo-switch and a manual override switch. The
> thermo switch should be compatible with the opening temperature of
> the engine thermostat. The thermoswitch should switch off at a
> temperature about 5 degrees C over the opening temperature of the
> thermostat. It should switch on near 90-95 degrees C.
>
> Remember, the higher the temperature the better the cooling
> because of an increase in Delta T.
>
> Kees Oudesluijs
>
> _______________________________________________
>
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FWIW, I had my BJ8's manifold coated--by JetHot--during an overhaul
and didn't notice any difference in running temps.<br>
<br>
<br>
<div class="moz-cite-prefix">On 7/21/2021 8:04 AM, Bruce Steele via
Healeys wrote:<br>
</div>
<blockquote type="cite"
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<div class="WordSection1">
<p class="MsoNormal"><span style="font-family:"Trebuchet
MS",sans-serif">Thanks, Alan. I had the exhaust
manifold ceramic coated years ago. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Trebuchet
MS",sans-serif"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Trebuchet
MS",sans-serif">Bruce Steele<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Trebuchet
MS",sans-serif">Brea, CA<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Trebuchet
MS",sans-serif">1960 BN7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Trebuchet
MS",sans-serif"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">
Alan Seigrist [<a class="moz-txt-link-freetext"
href="mailto:healey.nut@gmail.com";>mailto:healey.nut@gmail.com</a>] <br>
<b>Sent:</b> Tuesday, July 20, 2021 8:32 PM<br>
<b>To:</b> Harold Manifold <a class="moz-txt-link-rfc2396E"
href="mailto:manifold@telus.net";><manifold@telus.net></a><br>
<b>Cc:</b> Kees Oudesluijs <a class="moz-txt-link-rfc2396E"
href="mailto:coudesluijs@upcmail.nl";><coudesluijs@upcmail.nl></a>;
Bruce Steele <a class="moz-txt-link-rfc2396E"
href="mailto:healeybruce@roadrunner.com";><healeybruce@roadrunner.com></a>;
Austin
Healey <a class="moz-txt-link-rfc2396E"
href="mailto:Healeys@autox.team.net";><Healeys@autox.team.net></a><br>
<b>Subject:</b> Re: [Healeys] Auxiliary electric
fan<o:p></o:p></span></p>
<p class="MsoNormal"><o:p>Â </o:p></p>
<div>
<p class="MsoNormal">In 1991 bolt on cooling fans didn't have
sufficient CFMs to be particularly effective, but worked
well on the jags and MGs that had them simply because they
designed the systems around the CFMs they could produce. In
the last 10-15 years, the fans you can buy now can move a
huge amount of air, so putting a pusher in front of the
radiator is a viable option now.<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<div>
<p class="MsoNormal">Although my view still remains to make
sure the cooling system is sorted, suggest jet hot coating
the exhaust header first, and go with a plastic 5 blade
fan and use a 165 deg thermostat. If that still doesn't
work then consider adding a fan.<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<div>
<p class="MsoNormal">Cheers,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<div>
<p class="MsoNormal">Alan<o:p></o:p></p>
</div>
</div>
</div>
<p class="MsoNormal"><o:p>Â </o:p></p>
<div>
<div>
<p class="MsoNormal">On Wed, Jul 21, 2021 at 1:11 AM Harold
Manifold via Healeys <<a
href="mailto:healeys@autox.team.net";
moz-do-not-send="true">healeys@autox.team.net</a>>
wrote:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC
1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Bruce,<o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Â <o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">See
this 1991 memo form Geoff Healey. An electric fan
could worsen cooling problems if it doesnâ??t always
draw ambient air. <o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Â <o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Harold<o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Â <o:p></o:p></p>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:
</b><a href="mailto:healeys@autox.team.net";
target="_blank" moz-do-not-send="true">Kees
Oudesluijs via Healeys</a><br>
<b>Sent: </b>Tuesday, July 20, 2021 7:23 AM<br>
<b>To: </b><a
href="mailto:healeybruce@roadrunner.com";
target="_blank" moz-do-not-send="true">Bruce
Steele</a>; <a
href="mailto:Healeys@autox.team.net";
target="_blank" moz-do-not-send="true">Austin
Healey</a><br>
<b>Subject: </b>Re: [Healeys] Auxiliary electric
fan<o:p></o:p></p>
</div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Â <o:p></o:p></p>
<p>Always fit a thermo-switch and a manual override
switch. The thermo switch should be compatible with
the opening temperature of the engine thermostat. The
thermoswitch should switch off at a temperature about
5 degrees C over the opening temperature of the
thermostat. It should switch on near 90-95 degrees
C.<o:p></o:p></p>
<p>Remember, the higher the temperature the better the
cooling because of an increase in Delta T.<o:p></o:p></p>
<p>Kees Oudesluijs<o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Â <o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"
style="margin-bottom:12.0pt">_______________________________________________<br>
</p>
</blockquote>
</div>
</div>
</blockquote>
<br>
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