> -----Original Message-----
> From:
>
2cylinderhondas@yahoogroups.com [mailto:
2cylinderhondas@yahoogroups.com] > On > Behalf Of > Tad Clark > Sent:
> Thursday, April 06, 2006 10:21
> AM
> To:
>
2cylinderhondas@yahoogroups.com
> Subject:
> Re:
> [2cylinderhondas] Re: getting a touch more power
> The
> problem with this, is that the purpose of the fan is not to cool the oil, but > the head and cylinders. The head temps on an air cooled engine run on average > at least 100 degrees hotter than on an water cooled. The head needs cooling > all the time for this reason. Motorcycles get away without a fan because they > typically have more cooling fin area, and are not surrounded by sheet metal.
> It would also be diffucult to determine an ideal rpm for the motor, since the > stock fan speeds up with engine rpm to provide more cooling at higher > speeds.
> Anton Mealy
> wrote:
> > Another
> > compromise would be an electric thermo-clutch for the fan running > > off a > > thermo switch to eliminate the weight of an additional electric > > motor.
> > even if they are lighter than they used to
> > be.
> > Murray
> > Atkinson
> > To
> > > apult.com>
> > Sent
> > by:
> >
2cylinderhondas@yahoogroups.com
> > 2cylinderhondas@yaho
> > cc
> > ogroups.com
> > Subject
> > Re: [2cylinderhondas] Re: getting a
> > 06/04/2006 11:32
> > AM touch more
> > power
> > Please respond
> > to
> > 2cylinderhondas@yah
> > oogroups.com
> > The gain you get with an electric fan is that it doesn't > > need to run > > all the time.
> > So, the question for the air-cooled
> > engines is "Is the fan needed all
> > the time ?"
> > While the car
> > is cruising, I'd guess the fan isn't needed, with enough > > air flow > > provided by the car moving through the air.
> > But, to be sure you
> > should have the fan operated by some temperature
> > sensor. Easiest is
> > propably to measure oil temprature, and switch the
> > fan on when the engine
> > oil exceeds "normal operating temperature".
> > Now, the Austrlian
> > air-cooled Honda (except for the last few) used the
> > engine cooling fan as
> > the interior heating fan as well. So, if your
> > using your car in winter,
> > you might want an override switch to turn
> > the fan on whenever the
> > ignition is on, to get some heat into the
> > interior.
> > I think I'll
> > stick with my watercooled Z. It has an electric cooling > > fan and an > > interior heating fan - very civilized :-) > > Murray.
> > On
> > Thursday 06 April 2006 11:23, My72Z600@... wrote:
> > Greg is correct, I had a motor built for racing and the shop > > > instal > > 2 electric cooling fan and electric water pump to gain a > > > couple more > > horsepower. I go to the Lakeland Speed Way and 90% of > > > the car have > > electric fans.
> > > And I never seen a car with regular cooling fan
> > at Gator
> > > Nationals. Jose
> > > In a message dated
> > 4/5/2006 8:26:33 PM Eastern Daylight Time,
> > gregsikes@... writes:
> > > > I have to disagree. Look at most
> > hot rods, they run electric
> > > > fans.They build up there motor for
> > more power, why then would
> > > > they use an electric fan if it would
> > rob some of the power they
> > > > just spent lots of money to
> > make?
> > > > Greg
> > goinhm@... wrote:
> > > > >> Installing an electric fan would
> > cause you to waste horsepower
> > > > >> if the fan
> > > >> is running. It is more efficient to let the
> > engine spin the fan
> > > >> than to let the engine turn a generator
> > to produce electricity
> > > >> to run a motor to spin a
> > fan.
> > > >> If you want a touch more speed,
> > you can increase the tire
> > > >> pressure to the max recommended
> > pressure which will decrease the
> > > >> rolling resistance which
> > reduces friction with the road. Or you
> > > >> could close
> > all the windows to improve the aerodynamics. In
> > summer, you might last about 2 minutes with windows closed in
> > >> AZ.
> > > >> Be selective when you
> > challenge a VW Bug to a drag race....many
> > > >> of them are
> > faster than the 600.
> > > >> burn up that quarter
> > mile,
> > > >> Dale
> > Yahoo! Groups
> > Links
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