[Healeys] electrc fan vs. belt drive

Patrick and Caroline Quinn p_cquinn at tpg.com.au
Mon Feb 2 20:00:16 MST 2009


G'day Mike

This is an interesting thread.

The Australian company called Davis, Craig invented the thermatic fan many
years back. Now they have an electric water pump that controls the amount of
coolant flow, that when linked to an electric fan eliminates any power drain
whatsoever. 

The electric pump is plumbed into the inlet hose and you do away with the
thermostat and the water pump impeller. That is what you would do for a
simple installation to an Austin-Healey, but in modern cars such as the
Corvette that has it fitted there isn't a mechanical water pump or body at
all.

Have a look at www.daviescraig.com.au if you want to know more.

Of course I am on a ridiculously high commission for every electric water
pump sold.

Hoo Roo

Patrick Quinn
Sydney, Australia
(Where it's 95 F today)

-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of Michael Salter
Sent: Tuesday, 3 February 2009 1:52 PM
To: 'PG'; 'healeys'
Subject: Re: [Healeys] electrc fan vs. belt drive

For the fan to absorb 7% of the engine's power that 7% say 10 BHP would have
to be driven by the single "A" sectopm "V" belt.. 
The last time I looked it usually takes a pair of "A" section belts to drive
1/2 a horsepower!!

Michael Salter
100 (1953) #174
AHX12 (1953)
Bugeye (1961)
http://www.netbug.net/blogmichael/?p=432


-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of PG
Sent: February 2, 2009 3:25 PM
To: 'healeys'
Subject: [Healeys] electrc fan vs. belt drive

I'm also on a Triumph forum where a few people have claimed that the
installation of an electric cooling fan (and elimination of belt drive fan)
has increased their Power by about 7%.

 

They claim that the drag created by the fan on the waterpump pulley creates
a power loss that is more than the power loss due to the burden on the
Alternator/generator created by the electric fan.

 

Anybody have any thoughts?

 

Paul
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