Re: [Tigers] Engine TemperatureI agree with Al regarding the wide variation in
temperatures around the cooling system of your car.
I was really surprised at the variance in different locations just on the
radiator itself. The tape idea for getting a reading is neat -I never thought
of that. But I chose the location of the temperature sending unit in the
intake manifold to calibrate my gauge, as that is where Ford decided the
reading should be taken. Perhaps putting the tape adjacent to the sending unit
is the best idea? Interesting.
Dave
----- Original Message -----
From: al@airtest.us
To: Dave Munroe ; tigers-bounces@autox.team.net ; rfraser@bluefrog.com ;
denis mercier ; tigers@autox.team.net
Sent: Tuesday, October 19, 2010 2:03 AM
Subject: Re: [Tigers] Engine Temperature
Gentlemen,
You need to be careful when using an infrared thermometer to measure
temperature. The temperature the instrument "reads" is based on an assumed
emissivity value, usually .95. Try scanning all the visible components of your
cooling system and you will likely get wildly different temperature values due
to the differing emissivity values of aluminum water pumps, stainless hose
clamps, painted radiators, and rubber hoses, clean and dirty. The best way I
know to calibrate a surface is to place a piece of black electrical on the
surface you are trying to read. The tape has an emissivity value of .95, which
matches most non-adjustable meters. Also, shoot the temp very close, within
the spot ratio so the meter doesn't read an area larger than the tape cross
section.
Al
B9471635
Sent on the Sprint. Now Network from my BlackBerry.
-----------------------------------------------------------------------------
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From: "Dave Munroe" <dave@munroe.ca>
Sender: <tigers-bounces@autox.team.net>
Date: Mon, 18 Oct 2010 18:06:18 -0700
To: <rfraser@bluefrog.com>; denis mercier<denismercier@telvic.net>;
<tigers@autox.team.net>
Subject: Re: [Tigers] Engine Temperature
Hi Denis:
Here is an article that demonstrates the relationship between operating
temperature, power potential and engine wear. As Ron says, 180F is the best
compromise.
My temperature gauge was off more than 10F at 190F. I have an infrared
thermometer (you likely have a friend that has one if you don't - maybe you
can borrow it!). You can take a reading at the intake manifold where the
temperature sending unit sits, and bend the needle on the temp gauge to
match. Its best to do this at the operating temp you want to run you car
with.
Dave
ps anyone who wants a copy of this article e-mail me off line)
----- Original Message -----
From: " Ron Fraser" <rfraser@bluefrog.com>
To: "'denis mercier'" <denismercier@telvic.net>; <tigers@autox.team.net>
Sent: Monday, October 18, 2010 8:59 PM
Subject: Re: [Tigers] Engine Temperature
> Denis
> Ford published that the least amount of wear happens when the small
> block Ford engine is at 180 degrees F.
> Today's engines run with 195 or higher thermostats.
>
> Never trust the dash temp gauge unless you have calibrated it; most are
> off
> a fair amount.
>
> Ron Fraser
>
@autox.team.net
> Donate: http://www.team.net/donate.html
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> http://autox.team.net/mailman/options/tigers/dave@munroe.ca
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