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Stupid Question......

Old Aug 13, 2007 | 09:22 PM
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what is the temp at the line on the gauge between 100 and 220?????
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Old Aug 13, 2007 | 09:49 PM
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Originally Posted by 79 vette head
what is the temp at the line on the gauge between 100 and 220?????

Pic of said gauge? The only pic of a gauge I found for a '79 had marked lines for 100, 200, and 300.
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Old Aug 13, 2007 | 10:26 PM
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My '78 has 100, 200 and 280 with a mark between 100 and 200 that I guess would be 150 and another between 200 and 280 that marks the start of the red zone. The manual says the start of the red zone is 250.
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Old Aug 13, 2007 | 11:03 PM
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Originally Posted by 79 vette head
what is the temp at the line on the gauge between 100 and 220?????
Not able to guess which gauge, but assuming "the line" you are referring to is in the middle, I suppose it would be: 100+220= 320/2= 160 degrees.
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Old Aug 13, 2007 | 11:10 PM
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Are you trying to figure out what thermostat you need??? Its gonna be either 160 or 180.
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Old Aug 13, 2007 | 11:37 PM
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I always THOUGHT it's 200 as the 78 gauge actually had the "200" specified instead of the "220" as on the 79 gauge. I'll have to look closely next time the 79s warmed up.

79 gauge


78 gauge

Last edited by KapsSA; Aug 13, 2007 at 11:49 PM.
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Old Aug 14, 2007 | 04:18 AM
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Looks like an Inverse log scale, not linear, due to non linear sender. I'd say abour 180.
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Old Aug 14, 2007 | 07:13 AM
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Originally Posted by 79 vette head
what is the temp at the line on the gauge between 100 and 220?????
My '69 has a gauge marked like this. The needle stays right on the line between the 100 and 220, so since I'm using a 180 t-stat, I'm assuming that's 180. The thing is, I'm running a 454 with the original small block radiator, and after hearing all the overheating horror stories, I fully expected this thing to run hot. Maybe it's more than 180, I don't know.
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Old Aug 14, 2007 | 07:26 AM
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Originally Posted by KapsSA
I always THOUGHT it's 200 as the 78 gauge actually had the "200" specified instead of the "220" as on the 79 gauge. I'll have to look closely next time the 79s warmed up.

79 gauge


78 gauge
THE TOP ONE IS MY GAUGE. MY CAR LAST NIGHT. IT WAS COOL OUT AND CAR RAN RIGHT BETWEEN THE LINE AND 220. I BELEIVE I HAVE A 190 THERMOSTAT....
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Old Aug 14, 2007 | 07:45 AM
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Originally Posted by RunningMan373
Looks like an Inverse log scale, not linear, due to non linear sender. I'd say abour 180.
Correct- not linear.


Originally Posted by bashcraft
...I'm assuming that's 180. ...
Are you sure you have 180 thermo. (w/o holes) not 160?

It seems to me I checked the one a long time ago on the 77 which has 200 at top & got 180 at the line.


(220 at top probably 200 at the line) My SS has 220 at top.
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Old Aug 14, 2007 | 08:01 AM
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Originally Posted by Ganey
Correct- not linear.



Are you sure you have 180 thermo. (w/o holes) not 160?

It seems to me I checked the one a long time ago on the 77 which has 200 at top & got 180 at the line.


(220 at top probably 200 at the line) My SS has 220 at top.
Yes, it's a 180 (with holes).
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Old Aug 14, 2007 | 08:26 AM
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Originally Posted by bashcraft
Yes, it's a 180 (with holes).
As you can tell that's what I expected if not 160. You are doing good on the BB temp.
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