Fred,
Flex -a-lite makes fan clutches that are either operated by temperature or
engine speed - your choice. Check out Summit Racing.
Mike
----- Original Message -----
From: "roadster" <roadster@rcn.com>
To: "Brian Hollands" <bholland@hayes.ds.adp.com>; "Datsun Roadster Mailing
list" <datsun-roadsters@autox.team.net>
Sent: Thursday, April 26, 2001 2:20 AM
Subject: Re: Cooling
> Some of these cars came with fan clutches, and the damn things never
worked
> right. My '68 2000 had one with a 7-blade fan, and the clutch would bust
on
> it resulting in overheating. Since switching to a 4-blade non-clutch fan
> with a recored radiator my 2000 runs real cool.
>
> My question is, has anyone installed an alternative fan clutch for our
> roadsters that works well enough to re-capture the lost HP at high-speed,
> while cooling the engine at idle?
>
> Fred - So.SF
>
> ----- Original Message -----
> From: "Brian Hollands" <bholland@hayes.ds.adp.com>
> To: "Datsun Roadster Mailing list" <datsun-roadsters@autox.team.net>
> Sent: Wednesday, April 25, 2001 7:19 PM
> Subject: RE: Cooling
>
>
> > 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)?"
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