<VV> CHT data calibrate

[Dave Keillor]

Trends are fine and on a new car I'm quite happy to assume that it's
"normal" as delivered.  However, when installng a CHT gauge on a 35 year old
car for the first time, I'd like to know a wee bit more about what the head
termperature is actually running on an absolute basis.  Having determined
"normal", relative is fine henceforth.  Btw, I have no "little needle" on my
'69 Monza 140 car and inasmuch as it's a 140 which don't like to be
overheated, I'd like know where I'm starting wrt head temps.

Dave Keillor

-----Original Message-----
From: Duane, Jim [mailto:Jim.Duane@DigitalNet.com]
Sent: Tuesday, October 26, 2004 3:38 PM
To: Dave Keillor; Corvair List
Subject: RE: <VV> CHT data calibrate


In the words of Mr. Spock, Interesting!  IMHO, the value of a gauge is
in your 'vair's normal trends VS conditions.  I guess you can call that
"baseline", so calibrating the CHT is secondary.  325 VS 350 degrees F
VS 475 to 500.  Heck, +/- 25 degrees aside , I'm already asking why my
car is above 400!  It's the delta, not the actual!  Yes, I am a EE.
This may sound hypocritical, but I find the OEM dash temp fine for me as
I know where the little needle "normally" sits.      
	It really has to do with what you're "into", I guess.  My thing
is fuel economy/performance.  Others want to know cause and effect and
precise engine temperatures. My 'Vair is my tinker toy!  Enjoy!!  

-----Original Message-----
From: virtualvairs-admin@corvair.org
[mailto:virtualvairs-admin@corvair.org] On Behalf Of Dave Keillor
Sent: Tuesday, October 26, 2004 3:43 PM
To: Corvair List
Subject: RE: <VV> CHT data calibrate

As an engineer, you should know the value of an initial baseline.  I'm
in the process of installing CHT gauges on both sides, but I have no
idea whether my engine is currently running normal temps or excessively
hot.
Therefore, I'd really like to have an initial benchmark that's
reasonably close to actual.  After that I agree that relative readings
are fine.

Dave Keillor (EE)

-----Original Message-----
From: Roger Gault [mailto:r.gault@sbcglobal.net]
Sent: Tuesday, October 26, 2004 1:54 PM
To: Corvair List
Subject: Re: <VV> CHT data calibrate


So, Frank, you're driving down the road and you look down and your CHT
gauge is reading 327 degrees.  What are you going to do with this
information that couldn't be gotten from "Gee, it's a needle width
higher than it was last week."

This is not to say that I didn't calibrate my VDO gauges in boiling
water to see what the assumed reference junction temperature was,
because I did.  I am, after all, an anal engineer who likes to know
useless things.  ;-)

Roger Gault
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