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Re: Low side normal /high side low stumped
Posted: Sun Jun 27, 2021 6:08 pm
by Tim
We used thermal shield sheets back when we had the shop. Worked well I just don't have access to them anymore. I just posted a link for a type of product.
Re: Low side normal /high side low stumped
Posted: Sun Jun 27, 2021 6:12 pm
by Excursion2001
tbirdtbird wrote: ↑Sun Jun 27, 2021 5:18 pm
We use HushMat here in the cars we install AC in.
No spray, it is self adherent. Easy to apply. Cut pieces to shape to be able to tightly cover entire roof.
Since re-heating has not been considered until just now with Bohica's post, feel both heater hoses in the engine compartment. One should be cold. If both hot, you are getting reheating inside the air box. Another way to check is to clamp off one or both heater hoses with a c-clamp or visegrips, using blocks of wood on either side of the jaws so as to not harm the hose
Heater hose is cold front and rear . Is hush mat any good ?
Re: Low side normal /high side low stumped
Posted: Sun Jun 27, 2021 6:14 pm
by tbirdtbird
As stated we use it, and should mention are happy with it. It visually appears to be nearly identical to the secondskinaudio stuff Tim posted.
Not sure if the thickness of the two are the same though
The Hushmat, Dynamat, and seconskinaudio product all appear very similar.
I am sure there are others.
I would for starters compare the thickness and the price/sq ft of these 3 and go from there. Our understanding is that Hushmat is the best bang for the buck
On a real hot day get into the back of the vehicle and use an infrared temp gun to shoot the roof temp with the headliner still in place.
The 3 products above will still allow you to use the headliner. After applying the chosen product, re-test with the temp gun.
Idea, buy a small quantity of the thickest one, and try it out. Maybe they will send you a sample. 2 sq ft would be sufficient
Re: Low side normal /high side low stumped
Posted: Sun Jun 27, 2021 6:20 pm
by Tim
The problem will be, and I state again. How much do you want to spend on possibly improving the cooling?
Any of this stuff will work as far as insulation. But it's not cheap, it may not be enough, and you will need a lot, just for the roof alone.
https://www.amazon.com/Self-Adhesive-He ... eat+Shield
Re: Low side normal /high side low stumped
Posted: Sun Jun 27, 2021 8:00 pm
by Excursion2001
tbirdtbird wrote: ↑Sun Jun 27, 2021 6:14 pm
As stated we use it, and should mention are happy with it. It visually appears to be nearly identical to the secondskinaudio stuff Tim posted.
Not sure if the thickness of the two are the same though
The Hushmat, Dynamat, and seconskinaudio product all appear very similar.
I am sure there are others.
I would for starters compare the thickness and the price/sq ft of these 3 and go from there. Our understanding is that Hushmat is the best bang for the buck
On a real hot day get into the back of the vehicle and use an infrared temp gun to shoot the roof temp with the headliner still in place.
The 3 products above will still allow you to use the headliner. After applying the chosen product, re-test with the temp gun.
Idea, buy a small quantity of the thickest one, and try it out. Maybe they will send you a sample. 2 sq ft would be sufficient
I will have to give it a stab my friend was asking me about the Same thing about his jeep as well you guys aren’t lying this stuff is expensive for so little of it
Re: Low side normal /high side low stumped
Posted: Sun Jun 27, 2021 8:03 pm
by Excursion2001
Tim wrote: ↑Sun Jun 27, 2021 6:20 pm
The problem will be, and I state again. How much do you want to spend on possibly improving the cooling?
Any of this stuff will work as far as insulation. But it's not cheap, it may not be enough, and you will need a lot, just for the roof alone.
https://www.amazon.com/Self-Adhesive-He ... eat+Shield
Yeah I just looked at the prices it’s pretty steep lol but would there be any alternative I’m seeing these foam insulation that they use on cars as well called melamine foam
Re: Low side normal /high side low stumped
Posted: Sun Jun 27, 2021 8:41 pm
by bohica2xo
Melamine foam has an R value of about 3.5 per inch of thickness. Closed cell sprayed in foam is R7 per inch.
If you don't mind spraying some glue to stick it down, Polydamp PLE has an even better R value than sprayed foam.
https://www.polytechinc.com/products/th ... ation-foam
Melamine can pick up moisture, not a huge problem where you are.
All of the work to strip out headliners and door panels, I would want the most insulation for my effort.
.
Re: Low side normal /high side low stumped
Posted: Mon Jun 28, 2021 6:24 pm
by Excursion2001
bohica2xo wrote: ↑Sun Jun 27, 2021 8:41 pm
Melamine foam has an R value of about 3.5 per inch of thickness. Closed cell sprayed in foam is R7 per inch.
If you don't mind spraying some glue to stick it down, Polydamp PLE has an even better R value than sprayed foam.
https://www.polytechinc.com/products/th ... ation-foam
Melamine can pick up moisture, not a huge problem where you are.
All of the work to strip out headliners and door panels, I would want the most insulation for my effort.
.
will this stuff work as good as the hushmat ?
Re: Low side normal /high side low stumped
Posted: Tue Jun 29, 2021 3:51 pm
by bohica2xo
All I can say is the makers of Hush Mat, Dynamat, Dreck mat etc, do not publish R values for their products.
Wrap a couple of layers of bubble wrap on an arm or leg and see how well it holds heat. Insulation rated by R value is usually thicker than 1/4 inch.
We can foam a 1 ton cargo van and it gets cold enough to transport fresh fish from Los Angeles to Las Vegas in August. Usually takes 4 inches to get that kind of performance.