[Healeys] Auxiliary electric fan

Bob Spidell bspidell at comcast.net
Wed Jul 21 09:54:04 MDT 2021

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 at gmail.com]
> *Sent:* Tuesday, July 20, 2021 8:32 PM
> *To:* Harold Manifold <manifold at telus.net>
> *Cc:* Kees Oudesluijs <coudesluijs at upcmail.nl>; Bruce Steele 
> <healeybruce at roadrunner.com>; Austin Healey <Healeys at 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 
> <healeys at autox.team.net <mailto:healeys at autox.team.net>> wrote:
>     Bruce,
>     See this 1991 memo form Geoff Healey. An electric fan could worsen
>     cooling problems if it doesn’t always draw ambient air.
>     Harold
>     *From: *Kees Oudesluijs via Healeys <mailto:healeys at autox.team.net>
>     *Sent: *Tuesday, July 20, 2021 7:23 AM
>     *To: *Bruce Steele <mailto:healeybruce at roadrunner.com>; Austin
>     Healey <mailto:Healeys at autox.team.net>
>     *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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