cardboard hood insulation

[chrisgerman1983]

I made a hood insulator out of two layers of cardboard. I didn't take a pic of it yet, its not much to look at anyway :-) but I took a pic of the results... my window defrost before my Hood and after a ten minute drive my Hood was still mostly frozen. The only part that was defrosted was where heat escaped out the front.

[Frank Lee]

Tell us if you notice quicker/better defrost after it's been parked a while, and so on.

[chrisgerman1983]

I will do a warm up cool down graph on my torque app. Compare with and without the cardboard.

[Frank Lee]

Can't wait!

[chrisgerman1983]

My graph didnt seem to work out that well... I think I may have to just go out and check the temp periodically as it cools down. Here is a pic of the cardboard. It is two layers glued together with high heat contact adhesive and sealed with wipe on poly.

[Frank Lee]

Looks good. Is there a grille block too?

[chrisgerman1983]

Thanks, yes there is a plywood grill block and a partial belly pan. So after sitting for 4 hours with the outside temp between 0-5 degrees the coolant was at 24 degrees. I took a bunch of temps throughout the 4 hours. I will post all the numbers tomorrow after going without the cardboard

[chrisgerman1983]

what is the best way to make a chart? I have temperatures at certain times but there would be no way for me to make sure the exact times will be the same tomorrow. I just had to take a reading when it was convenient. I am feeling really old... caught myself thinking that it would just be easier on a sheet of graph paper

[chrisgerman1983]

Here are today's numbers with insulator. Not sure if the bluetooth froze around 10 or if the temp actually hovered around 50c for that long? either way for the final temp at noon I reset and reconnected to make sure.

Engine on
7:55 - 5c 41f
7:57 - 15c 59f
7:59 - 41c 106f
8:01 - 54c 129f
8:02 - 63c 145f
8:03 - 72c 161f
8:05 - 86c 187f
Engine off
8:17 - 75c 167f
8:31 - 69c 156f
8:48 - 62c 144f
9:12 - 54c 129f
9:43 - 50c 122f
10:19 - 50c 122f
12:12 - 24c 75f

[Frank Lee]

10 sure looks erroneous.

Now to see how it compares with no blanket...