All other things being equal it would be better to
operate in the range when the thermostat is just
coming into full open then running just under the fan
temp switch point.
Don,
Even granting that the ideal temp range is a range where the thermostat is
just opening (and I don't know what evidence there is for that) and where
the fans accordingly should hardly ever turn on except when running the A/C,
you are arguing that the hood/grill/bellypan is designed as a coordinated
system in such a way to steadily evacuate air from the engine compartment by
pulling it through the radiators such that the fans are NOT really needed,
thereby keeping temps at an optimized lower-than-what-trips-the-fans AND
high-enough-to-open-the-thermostat range. I follow your logic, but I don't
believe the pan is part of a system that sophisticated and optimized around
keeping the fans off. Why bother? Just run the fans.
I think instead that the pan is more simply part of a system designed to
minimize the costs associated with weatherproofing and protecting vulnerable
underhood components, and that's very important in highly electronic cars
with lots of sensors, wiring and fittings. Likewise, costs are reduced
because the pan forms a physical shield that protects components, wiring and
plumbing thereby eliminating the need to engineer all those things out of
harm's way, or make tem impact resistant. Is the pan also engineered to be
part of a venturi-style cooling system that's optimize for an idealized temp
range lower than the temp range that trips the fans? I highly doubt it.
Could be, but I just don't think so.
----------
From: "Donald " <gibbonsnc@...>
To: ev_update@...
Subject: [ev_update] Re: Belly pan
Date: Tue, Sep 18, 2001, 12:30 PM
I was not thinking so much about the fans as I was about the coolant
temps being lower.
Look at it this way: If you have all other things equal (engine
speed, ground/air speed, grade of road) more air thru the radiator
will give you lower coolant temps.
I don't have my book with me right now but there are two temp ranges
here: Fan switch & thermostat setting. Its clear that no matter what
the ground/air speed the fan will come on when the coolant gets hot
enough. But there is a gap between when the thermostat is fully open
and when the fans come on. All other things being equal it would be
better to operate in the range when the thermostat is just coming
into full open then running just under the fan temp switch point.
Yahoo! Groups Sponsor ADVERTISEMENT
finalURL =
"
98:HM/A=793313/R=0/*; var
flashFileURL = ";
var noFlashImg = ";
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service
<> .
