Temp gauge jump with AC on?
Thread Starter
Instructor
Joined: Jun 2019
Posts: 232
Likes: 14
Temp gauge jump with AC on?
I hardly ever use my air conditioner on my '81. It's over 90, so I flipped it on normal. It works fine, but the temp gage probably jumped 10-15 degrees pretty quickly. Is that normal??
Le Mans Master
Joined: Oct 2007
Posts: 7,456
Likes: 977
From: RI, Now Franklin/Nashville TN
Yes, that actually would be fairly decent at 210 degrees with 95 air temp.
My 78 OEM L-82 4 speed before the rebuild would run 225 normal, no ac, warm outside, and 235-240 with AC on hot humid day. The smog cylinder heads were designed for VERY high water temps to help burn off emissions. The OEM L-82 block rebuilt/upgraded today with AFR aluminum heads, roller cam and 10.2:1 compression never runs temp above 180-185 degrees with the same exact cooling system components.....
My 78 OEM L-82 4 speed before the rebuild would run 225 normal, no ac, warm outside, and 235-240 with AC on hot humid day. The smog cylinder heads were designed for VERY high water temps to help burn off emissions. The OEM L-82 block rebuilt/upgraded today with AFR aluminum heads, roller cam and 10.2:1 compression never runs temp above 180-185 degrees with the same exact cooling system components.....
Le Mans Master
Joined: Jan 2001
Posts: 6,743
Likes: 1,385
"Jumped"? It should NOT jump. The temp may slowly creep up but if it "jumped" then you have some sort of electrical issue.
Le Mans Master
Joined: Jun 2019
Posts: 7,659
Likes: 2,470
From: Indiana
If low speed or idling ….yes….
The condenser is preheating the air to the radiator….
assume cooling system in good shape.
if you want to increase airflow when ac on try this..
https://www.corvetteforum.com/forums...ss-option.html
The condenser is preheating the air to the radiator….
assume cooling system in good shape.
if you want to increase airflow when ac on try this..
https://www.corvetteforum.com/forums...ss-option.html
