Coasty

The temp sensor is right between the radiator and the grill on the drivers
side of the front end so it is giving you nose temperature.

--
Coasty
Semper Paratus
(Always Ready)

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42A49437.FC8809A2@sympatico.ca...
> Is it giving you the road temperature or the air temperature?
>
> I had a Volvo that gave the road temperature which was normally hotter,
> sometimes a 'lot' hotter. Came in handy around freezing to know when
> the road went critical.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> FrankW wrote:
>>
>> My new Jeep has one of those rear view
>> mirrors which has a compass and temperature gauge in it.
>> I noticed that it is off by about 5 degrees Celsius.
>> Is this normal? If so what's the fricken point.
>> Cheers
>> Frank

DaveW

Coasty wrote:
> The temp sensor is right between the radiator and the grill on the drivers
> side of the front end so it is giving you nose temperature.
>

I might add that on my 91XJ, it goes up, and up, and up when stuck in
traffic, then down, and down, and down again when you get moving. Often,
on a clearly 70F or so day, it will get over 100 after about 10 min.
stuck in Los Angeles traffic.

When moving right along, it tends to read about 2-5 degrees high,
compared to what the radio weather people say. The compass works pretty
well though....

Regards,

DAve

DaveW

Coasty wrote:
> The temp sensor is right between the radiator and the grill on the drivers
> side of the front end so it is giving you nose temperature.
>

I might add that on my 91XJ, it goes up, and up, and up when stuck in
traffic, then down, and down, and down again when you get moving. Often,
on a clearly 70F or so day, it will get over 100 after about 10 min.
stuck in Los Angeles traffic.

When moving right along, it tends to read about 2-5 degrees high,
compared to what the radio weather people say. The compass works pretty
well though....

Regards,

DAve

DaveW

Coasty wrote:
> The temp sensor is right between the radiator and the grill on the drivers
> side of the front end so it is giving you nose temperature.
>

I might add that on my 91XJ, it goes up, and up, and up when stuck in
traffic, then down, and down, and down again when you get moving. Often,
on a clearly 70F or so day, it will get over 100 after about 10 min.
stuck in Los Angeles traffic.

When moving right along, it tends to read about 2-5 degrees high,
compared to what the radio weather people say. The compass works pretty
well though....

Regards,

DAve

DaveW

Coasty wrote:
> The temp sensor is right between the radiator and the grill on the drivers
> side of the front end so it is giving you nose temperature.
>

I might add that on my 91XJ, it goes up, and up, and up when stuck in
traffic, then down, and down, and down again when you get moving. Often,
on a clearly 70F or so day, it will get over 100 after about 10 min.
stuck in Los Angeles traffic.

When moving right along, it tends to read about 2-5 degrees high,
compared to what the radio weather people say. The compass works pretty
well though....

Regards,

DAve

FrankW

I am aware that different conditions may affect the reading
Like the temp may be higher above the black asphalt on a sunny day.
(I heard of glider pilots using the hot air rise above freeway
cloverleafs) But if the reading is drastically wrong in ideal test
conditions, then really why bother to even put a temp gauge in a car.
It's "almost" like having a fuel gauge which reads 1/4 tank when it's
really empty.


Jeff Strickland wrote:
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:42A49437.FC8809A2@sympatico.ca...
>
>>Is it giving you the road temperature or the air temperature?
>>
>>I had a Volvo that gave the road temperature which was normally hotter,
>>sometimes a 'lot' hotter. Came in handy around freezing to know when
>>the road went critical.
>>
>
>
>
> Why would you want any other temp when driving a car? From the car's
> perspective, SAFETY is the paramount issue. If you are going to get the
> outside temp, you would want that temp to be viewed from the rose colored
> glasses of Safety. If the temp said 40 and there was ice on the ground, then
> you would want to know that the temp was really somewhere below 35 where ice
> might not have melted away yet.
>
> Sorry Mike, I wasn't ranting at you ...
>
>

FrankW

I am aware that different conditions may affect the reading
Like the temp may be higher above the black asphalt on a sunny day.
(I heard of glider pilots using the hot air rise above freeway
cloverleafs) But if the reading is drastically wrong in ideal test
conditions, then really why bother to even put a temp gauge in a car.
It's "almost" like having a fuel gauge which reads 1/4 tank when it's
really empty.


Jeff Strickland wrote:
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:42A49437.FC8809A2@sympatico.ca...
>
>>Is it giving you the road temperature or the air temperature?
>>
>>I had a Volvo that gave the road temperature which was normally hotter,
>>sometimes a 'lot' hotter. Came in handy around freezing to know when
>>the road went critical.
>>
>
>
>
> Why would you want any other temp when driving a car? From the car's
> perspective, SAFETY is the paramount issue. If you are going to get the
> outside temp, you would want that temp to be viewed from the rose colored
> glasses of Safety. If the temp said 40 and there was ice on the ground, then
> you would want to know that the temp was really somewhere below 35 where ice
> might not have melted away yet.
>
> Sorry Mike, I wasn't ranting at you ...
>
>

FrankW

I am aware that different conditions may affect the reading
Like the temp may be higher above the black asphalt on a sunny day.
(I heard of glider pilots using the hot air rise above freeway
cloverleafs) But if the reading is drastically wrong in ideal test
conditions, then really why bother to even put a temp gauge in a car.
It's "almost" like having a fuel gauge which reads 1/4 tank when it's
really empty.


Jeff Strickland wrote:
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:42A49437.FC8809A2@sympatico.ca...
>
>>Is it giving you the road temperature or the air temperature?
>>
>>I had a Volvo that gave the road temperature which was normally hotter,
>>sometimes a 'lot' hotter. Came in handy around freezing to know when
>>the road went critical.
>>
>
>
>
> Why would you want any other temp when driving a car? From the car's
> perspective, SAFETY is the paramount issue. If you are going to get the
> outside temp, you would want that temp to be viewed from the rose colored
> glasses of Safety. If the temp said 40 and there was ice on the ground, then
> you would want to know that the temp was really somewhere below 35 where ice
> might not have melted away yet.
>
> Sorry Mike, I wasn't ranting at you ...
>
>

FrankW

I am aware that different conditions may affect the reading
Like the temp may be higher above the black asphalt on a sunny day.
(I heard of glider pilots using the hot air rise above freeway
cloverleafs) But if the reading is drastically wrong in ideal test
conditions, then really why bother to even put a temp gauge in a car.
It's "almost" like having a fuel gauge which reads 1/4 tank when it's
really empty.


Jeff Strickland wrote:
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:42A49437.FC8809A2@sympatico.ca...
>
>>Is it giving you the road temperature or the air temperature?
>>
>>I had a Volvo that gave the road temperature which was normally hotter,
>>sometimes a 'lot' hotter. Came in handy around freezing to know when
>>the road went critical.
>>
>
>
>
> Why would you want any other temp when driving a car? From the car's
> perspective, SAFETY is the paramount issue. If you are going to get the
> outside temp, you would want that temp to be viewed from the rose colored
> glasses of Safety. If the temp said 40 and there was ice on the ground, then
> you would want to know that the temp was really somewhere below 35 where ice
> might not have melted away yet.
>
> Sorry Mike, I wasn't ranting at you ...
>
>

Professor

I think you're expecting 1% accuracy... where 5% was designed.

Professor
www.telstar-electronics.com