The below is correct but overlooks one thing. The electric fan only runs
(draws HP via a greater load on the alternator) when the fan is running.
The HP gain, however small it may be, comes from the fact that at any speed
above about 30 mph there is enough airflow across the radiator to keep the
coolant temp below the fans switch on point. The fan should run only when
your stopped or driving slowly thus at speed, you use less HP to run
accessories.
That's the idea anyway.
Brian
-----Original Message-----
From: owner-datsun-roadsters@autox.team.net
[mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Ryan, Richard
Sent: Wednesday, April 25, 2001 7:31 PM
To: 'CalSpeed@aol.com'; dneuman@hodge.sfsu.edu; datsunmike@nyc.rr.com
Cc: datsun-roadsters@autox.team.net
Subject: RE: Cooling
To evaluate the performance change--
Yes, it takes energy to run any fan. Maybe only a small amount (my guess, 1
to 1.5 HP). So the question is "Where do you want to get the HP from?
Directly from the car's motor or the electrical system (electric fan)?"
|