I recently read an article about that exact same scenario. The electric fan
drained .5 HP and depending on the mechanical fan employed, up to 10 HP
were lost as the revs climbed.
There was no contest as to which drained the least HP - the electric fan won
by an impressive margin. I'll try to find the article - I think I'm getting
senile or have a disease called CRS.
Mike
----- Original Message -----
From: "Ryan, Richard" <RRyan@frk.com>
To: <CalSpeed@aol.com>; <dneuman@hodge.sfsu.edu>; <datsunmike@nyc.rr.com>
Cc: <datsun-roadsters@autox.team.net>
Sent: Wednesday, April 25, 2001 7:30 PM
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)?"
>
> Also remember that unless you are not running a generator/alternator
(direct
> drain system) all the energy must come from the car's motor sooner or
later
> (suck it out of the battery and then put it back in).
>
> Unless you are racing and want every possible mph, it is not much of a
> performance gain.
>
> Dick Ryan ex. 24022
> (650)312-4022
> Risk Management Dept.
> SM 2000/2
> FAX (650)312-5830
>
>
>
> Did you remove the stock unit? Are you runnning both? I was thinking of
> removing the stock fan and installing an electric fan. I hear that there
> are
> some small performance gains to be had.
>
> Calspeed
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