Trunk temperature
05-09-2022, 08:34 AM
#1
Instructor
Thread Starter
Trunk temperature
Being a curious sort, and having read comments about the heat in the trunk, I put a remote temperature sensor in the trunk of my 2022 3LT Z51 HTC. The point where I started driving was about 10:15 am. Somewhat of a surprise is that the temperature actually rises after one stops driving and shuts off the engine. I parked at about 2:00 pm and the high temperature was closer to 2:45 pm.
Timestamp for sample frequency every 15 min
Temperature (°F)
2022-05-07 09:00:00
68.9451
2022-05-07 09:15:00
69.1768
2022-05-07 09:30:00
69.4664
2022-05-07 09:45:00
69.7559
2022-05-07 10:00:00
70.2000
2022-05-07 10:15:00
73.8486
2022-05-07 10:30:00
80.5475
2022-05-07 10:45:00
93.3469
2022-05-07 11:00:00
109.6404
2022-05-07 11:15:00
114.4281
2022-05-07 11:30:00
114.6019
2022-05-07 11:45:00
113.5401
2022-05-07 12:00:00
113.6559
2022-05-07 12:15:00
113.6945
2022-05-07 12:30:00
113.4242
2022-05-07 12:45:00
113.3277
2022-05-07 13:00:00
113.8876
2022-05-07 13:15:00
112.8837
2022-05-07 13:30:00
110.7408
2022-05-07 13:45:00
109.8528
2022-05-07 14:00:00
111.8605
2022-05-07 14:15:00
121.8992
2022-05-07 14:30:00
132.5943
2022-05-07 14:45:00
135.7603
2022-05-07 15:00:00
133.9649
2022-05-07 15:15:00
130.3163
2022-05-07 15:30:00
126.4359
2022-05-07 15:45:00
122.8645
2022-05-07 16:00:00
119.7563
2022-05-07 16:15:00
117.1501
2022-05-07 16:30:00
114.9300
2022-05-07 16:45:00
113.0574
2022-05-07 17:00:00
111.3972
2022-05-07 17:15:00
109.9879
Timestamp for sample frequency every 15 min
Temperature (°F)
2022-05-07 09:00:00
68.9451
2022-05-07 09:15:00
69.1768
2022-05-07 09:30:00
69.4664
2022-05-07 09:45:00
69.7559
2022-05-07 10:00:00
70.2000
2022-05-07 10:15:00
73.8486
2022-05-07 10:30:00
80.5475
2022-05-07 10:45:00
93.3469
2022-05-07 11:00:00
109.6404
2022-05-07 11:15:00
114.4281
2022-05-07 11:30:00
114.6019
2022-05-07 11:45:00
113.5401
2022-05-07 12:00:00
113.6559
2022-05-07 12:15:00
113.6945
2022-05-07 12:30:00
113.4242
2022-05-07 12:45:00
113.3277
2022-05-07 13:00:00
113.8876
2022-05-07 13:15:00
112.8837
2022-05-07 13:30:00
110.7408
2022-05-07 13:45:00
109.8528
2022-05-07 14:00:00
111.8605
2022-05-07 14:15:00
121.8992
2022-05-07 14:30:00
132.5943
2022-05-07 14:45:00
135.7603
2022-05-07 15:00:00
133.9649
2022-05-07 15:15:00
130.3163
2022-05-07 15:30:00
126.4359
2022-05-07 15:45:00
122.8645
2022-05-07 16:00:00
119.7563
2022-05-07 16:15:00
117.1501
2022-05-07 16:30:00
114.9300
2022-05-07 16:45:00
113.0574
2022-05-07 17:00:00
111.3972
2022-05-07 17:15:00
109.9879
Last edited by Smuuth; 05-09-2022 at 08:56 AM.
05-09-2022, 08:50 AM
#2
yeah with no airflow the cats and the exhaust pipes sitting under the trunk turn it into a oven pretty quickly....
After track sessions my trunk can get so hot that i cant touch anything metal inside of it (remote reservoir *****, wing mounts, etc).
After track sessions my trunk can get so hot that i cant touch anything metal inside of it (remote reservoir *****, wing mounts, etc).
05-09-2022, 08:50 AM
#3
It appears you've copied the same data twice?
I'd be curious as to what ambient temps were during that period, and how much they increased during the 5 hours of driving. Would also be interesting to correlate the ups and downs with your driving conditions (e.g., were the highest temps noted while stopped in traffic, or while at high speeds). And I wonder what occurred between 10:30 and 11:00, when temps rose 30 degrees, and between 14:00 and 14:30, when they jumped by 22 degrees.
Interesting data nonetheless. Don't carry ice cream or chocolate in the trunk.
I'd be curious as to what ambient temps were during that period, and how much they increased during the 5 hours of driving. Would also be interesting to correlate the ups and downs with your driving conditions (e.g., were the highest temps noted while stopped in traffic, or while at high speeds). And I wonder what occurred between 10:30 and 11:00, when temps rose 30 degrees, and between 14:00 and 14:30, when they jumped by 22 degrees.
Interesting data nonetheless. Don't carry ice cream or chocolate in the trunk.
The following users liked this post:
robob (07-03-2022)
05-09-2022, 08:58 AM
#4
Instructor
Thread Starter
It appears you've copied the same data twice?
I'd be curious as to what ambient temps were during that period, and how much they increased during the 5 hours of driving. Would also be interesting to correlate the ups and downs with your driving conditions (e.g., were the highest temps noted while stopped in traffic, or while at high speeds). And I wonder what occurred between 10:30 and 11:00, when temps rose 30 degrees, and between 14:00 and 14:30, when they jumped by 22 degrees.
Interesting data nonetheless. Don't carry ice cream or chocolate in the trunk.
I'd be curious as to what ambient temps were during that period, and how much they increased during the 5 hours of driving. Would also be interesting to correlate the ups and downs with your driving conditions (e.g., were the highest temps noted while stopped in traffic, or while at high speeds). And I wonder what occurred between 10:30 and 11:00, when temps rose 30 degrees, and between 14:00 and 14:30, when they jumped by 22 degrees.
Interesting data nonetheless. Don't carry ice cream or chocolate in the trunk.
05-09-2022, 08:59 AM
#5
Instructor
Yeah, pretty clear the front-trunk is where things are to be kept. The rear is just for the top or golf clubs.
Unless you're a DoorDash driver, in which case, that's a feature.
Unless you're a DoorDash driver, in which case, that's a feature.
Last edited by Melvinne; 05-09-2022 at 10:25 AM.
05-09-2022, 10:05 AM
#6
Advanced
now do inside the cabin on a sunny day
05-10-2022, 01:14 AM
#8
Race Director
Member Since: Mar 2001
Location: Bonneville Salt Flats, 223mph Aug. '04
Posts: 17,491
Received 5,243 Likes
on
3,474 Posts
But, the good thing is... you can heat your lunch in it! 
05-10-2022, 08:43 AM
#10
In my limited experience thus far (only had car since Jan, and things just starting to heat up), I would say it seems comparable to a typical trunk on a normal car that’s in the rear. Definitely gets pretty warm if left in the sun. But doesn’t seem any worse either.
05-10-2022, 02:32 PM
#11
Racer
The frunk is way too inconvenient to use on a regular basis. The double button press and handing to force the hood down so hard to get it to actually close make me rarely use it. Only time I use the frunk is if the trunk is full or if I have food that needs to stay cold.
05-10-2022, 03:14 PM
#13
Melting Slicks
In my limited experience thus far (only had car since Jan, and things just starting to heat up), I would say it seems comparable to a typical trunk on a normal car that’s in the rear. Definitely gets pretty warm if left in the sun. But doesn’t seem any worse either.
07-03-2022, 11:42 AM
#14
Instructor
OP:
>2022-05-07 10:30:00
>80.5475
>...
2022-05-07 11:00:00
109.6404
29F degree increase in 30 minutes? Wow!
RE: my MY23 trunk is crazy hot. I''m comparing it to admittedly old school 87 Turbo Esprit (mid-engine turbo 2.2 liter) and C8 rear trunk is MAGNITUDES overall hotter than I realized.
I went down the street - about 3 miles - to get a document notarized.
Afterwards, I put the single sheet of paper in a plastic folder, put on top of jacket in rear trunk and drove home the 3 miles back.
That sheet of paper was SO HOT on a short trip - WOW!
Question - has anyone looked at creating a thermal liner for C8 rear trunk?
On my 87 Turbo Esprit I use thermal bags for sensitive items - the passenger side rear trunk is actually far cooler than any part of a C8 rear trunk.
The front trunk on Esprit has central radiator and spare tire; some parts get hot there too.
I'm thinking of sewing a big thermal 'sleeve' that hangs on the cargo net hooks.
It's not a solution as much as workaround.
>2022-05-07 10:30:00
>80.5475
>...
2022-05-07 11:00:00
109.6404
29F degree increase in 30 minutes? Wow!
RE: my MY23 trunk is crazy hot. I''m comparing it to admittedly old school 87 Turbo Esprit (mid-engine turbo 2.2 liter) and C8 rear trunk is MAGNITUDES overall hotter than I realized.
I went down the street - about 3 miles - to get a document notarized.
Afterwards, I put the single sheet of paper in a plastic folder, put on top of jacket in rear trunk and drove home the 3 miles back.
That sheet of paper was SO HOT on a short trip - WOW!
Question - has anyone looked at creating a thermal liner for C8 rear trunk?
On my 87 Turbo Esprit I use thermal bags for sensitive items - the passenger side rear trunk is actually far cooler than any part of a C8 rear trunk.
The front trunk on Esprit has central radiator and spare tire; some parts get hot there too.
I'm thinking of sewing a big thermal 'sleeve' that hangs on the cargo net hooks.
It's not a solution as much as workaround.
The following users liked this post:
robob (07-03-2022)
07-03-2022, 11:56 AM
#15
Race Director
We discussed this at our monthly Corvette club meeting. Long drives even at high ambient, the temps are fine. In extended stop and go, they get very hot (metal on folding chairs barely touchable. 2021-2023 MY seem to be much cooler than 2020s.
Rule: no cosmetics or other meltables/toiletries in the trunk!
Rule: no cosmetics or other meltables/toiletries in the trunk!
07-03-2022, 11:59 AM
#16
Le Mans Master
Member Since: Jul 2000
Location: North Dallas 40 TX
Posts: 6,469
Received 4,383 Likes
on
2,070 Posts
………
That sheet of paper was SO HOT on a short trip - WOW!
Question - has anyone looked at creating a thermal liner for C8 rear trunk?
On my 87 Turbo Esprit I use thermal bags for sensitive items - the passenger side rear trunk is actually far cooler than any part of a C8 rear trunk.
The front trunk on Esprit has central radiator and spare tire; some parts get hot there too.
I'm thinking of sewing a big thermal 'sleeve' that hangs on the cargo net hooks.
It's not a solution as much as workaround.
That sheet of paper was SO HOT on a short trip - WOW!
Question - has anyone looked at creating a thermal liner for C8 rear trunk?
On my 87 Turbo Esprit I use thermal bags for sensitive items - the passenger side rear trunk is actually far cooler than any part of a C8 rear trunk.
The front trunk on Esprit has central radiator and spare tire; some parts get hot there too.
I'm thinking of sewing a big thermal 'sleeve' that hangs on the cargo net hooks.
It's not a solution as much as workaround.
https://www.horsepowerobsessed.com/p...eat-shield-kit
Some vendors have claimed a 30 degree improvement.
07-03-2022, 02:23 PM
#17
E-Ray, 3LZ, ZER, LIFT
Member Since: Sep 2007
Location: NE South Carolina
Posts: 29,590
Received 9,657 Likes
on
6,653 Posts
Frunk's better but won't keep warm!!
The following users liked this post:
cor28vettes (07-04-2022)
07-03-2022, 02:28 PM
#18
Burning Brakes
Member Since: Apr 2022
Location: Northern VA
Posts: 782
Received 640 Likes
on
309 Posts
2022 C8 of the Year Finalist - Unmodified
GM addressed adding insulation to the trunk. The reality is all insulation does is slow down heat transfer. So for shorter trips, yeah, it would stay cooler. But after enough time (depending on the R value) you'd reach the same temps anyway. Insulation won't make it cooler, it will make it warm up slower. Depending on how you insulate, you may get the added effect of keeping it warmer longer too. Think of how outdoor ovens work. They take a while to get hot, but once they do, they stay hot.
The following 2 users liked this post by Shoal07:
JerryU (07-03-2022),
Red Mist Rulz (07-04-2022)
07-03-2022, 04:49 PM
#19
Drifting
It appears you've copied the same data twice?
I'd be curious as to what ambient temps were during that period, and how much they increased during the 5 hours of driving. Would also be interesting to correlate the ups and downs with your driving conditions (e.g., were the highest temps noted while stopped in traffic, or while at high speeds). And I wonder what occurred between 10:30 and 11:00, when temps rose 30 degrees, and between 14:00 and 14:30, when they jumped by 22 degrees.
Interesting data nonetheless. Don't carry ice cream or chocolate in the trunk.
I'd be curious as to what ambient temps were during that period, and how much they increased during the 5 hours of driving. Would also be interesting to correlate the ups and downs with your driving conditions (e.g., were the highest temps noted while stopped in traffic, or while at high speeds). And I wonder what occurred between 10:30 and 11:00, when temps rose 30 degrees, and between 14:00 and 14:30, when they jumped by 22 degrees.
Interesting data nonetheless. Don't carry ice cream or chocolate in the trunk.
The following users liked this post:
SECLT22021 (07-03-2022)
07-03-2022, 09:43 PM
#20
Le Mans Master
GM addressed adding insulation to the trunk. The reality is all insulation does is slow down heat transfer. So for shorter trips, yeah, it would stay cooler. But after enough time (depending on the R value) you'd reach the same temps anyway. Insulation won't make it cooler, it will make it warm up slower. Depending on how you insulate, you may get the added effect of keeping it warmer longer too. Think of how outdoor ovens work. They take a while to get hot, but once they do, they stay hot.
