heat barrier

[NutmegCT]

I've been wondering what to put under the carpet on my TR to cut down on the heat coming from the tunnel and firewall. In summer, that steel gets way too hot to touch after driving, and radiates heat all over the cockpit.

So I got several recommended products and actually measured the temp while they were placed on a 250F steel surface.

Temps were measured on the top surface of each product, while it was lying on the 250F surface (the top of a BBQ) until the Stortz thermometer stopped rising.

Dynamat Dynaliner (1/4"): 160F
Eastwood Thermo-Coustic (1/4"): 175F
Real jute underlayment (1/2"): 110F
HomeDepot "Step Ahead" carpet underlayment(1/2"): 90F

Not scientific, and two different thicknesses, but an interesting comparison. Neither Dynamat nor Eastwood recommend "doubling" the thickness of their 1/4" products. Must say I'm thinking of the carpet underlayment for my TR.

Tom

 

[70herald]

Two other things to consider, do they absorb and hold water, and fire resistance.
Yisrael

 

[bighealeysource]

Hey Nutmeg,
I used the Eastwood product on my 100M and been very satisfied with the results. Easy to work with and cut and really sticks well. I also used a closed cell -bubble wrap with foil backing type product on the trans tunnel- and that too is not bothered by water or moisture plus cheap and tunnel is not hot. I would agree with Yisrael, the other products could get wet if you get stuck in the rain, etc, and also might simply absorb moisture from humidity,etc. Nice comparison on the different types of products !
Regards,
Mike

 

[Brosky]

Now I wonder about everyone who has installed these on their inner door panels....