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While I'm posting, here's another 2 cents. I hate removing the belly
pan and hate the fact I can't see anything, "watch" and understand
my engine with it on. Having the light come from the bottom allows
for better visual inspect from the top and gives bottom visisbility
as well. I've been running 10000 miles without it, so far so good.

Paul

--- In ev_update@y..., "Michael G. McCarthy" <mgmccarthy@c...> wrote:

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@y...>
To: ev_update@y...
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.



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