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

 

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).

 

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.

 

thank you, I deleted the superfluous data.

 

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.

 

now do inside the cabin on a sunny day

 

Better yet.. Do the Air Temp just above the engine cover on the HTC, both top up and top down. Thanks

 

But, the good thing is... you can heat your lunch in it!

 

I would love to know the temp of the frunk from just sitting in the sun all day while parked.

 

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.

 

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.

 

Tadge says put the beer in the frunk and pizza in the back. I've been on some long drives with mine and noticed it gets warm, but I am sure it is nowhere near the temps you hit.

 

The trick is what is that temperature?

 

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.

 

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!

 

I think a couple of CorvetteForum sponsors sell a kit. Here is one.

https://www.horsepowerobsessed.com/p...eat-shield-kit

Some vendors have claimed a 30 degree improvement.

 

Would be OK for Pizza but that rear shape limits the size even if you build a shelf!

Frunk's better but won't keep warm!!

 

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.

 

I learned that early in my ownership. The beer and ice cream go in the frunk on the way home from the store.

 

While insulation only slows heat transfer, it can help keep the trunk cooler if installed in just the right places. Some people were thinking if they insulated all trunk surfaces it would make it better. But the reality is you need to insulate the surfaces that are exposed to the heat sources and leave the cooler places uninsulated to allow the heat to escape. Also, the insulation with foil surfaces will help with thermal radiation.