[Xist]

I remember members arguing about this.

I found this from 2009: Developed for winter commuting (but now I run 'em year around)
Frank Lee cut a sheet of cardboard and put it under his car hood and used 1" foil-faced foam in his truck.

Originally Posted by Daox

Hey Frank Lee. Any chance you could find your old pictures and host them on EM? I'm looking to add this thread to the 65+ mods list and pictures really are helpful.

#23 11-30-2017

Daox posted Super fast warm up mod - Engine insulation in 2011.

The fifth post is Frank Lee sharing his older thread.

The argument I remember is that cardboard and coroplast have negligible insulative properties.

I also remember people putting fiberglass welding blankets under their hoods, but I will need to finish that thread and possibly look elsewhere later.