[Healeys] Auxiliary electric fan

[Alan Seigrist]

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> 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 <healeys at autox.team.net>
> *Sent: *Tuesday, July 20, 2021 7:23 AM
> *To: *Bruce Steele <healeybruce at roadrunner.com>; Austin Healey
> <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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