I made and installed this last week and couln't wait to try it out. It's warm here today, about 40 F. I plugged it in for 20 min and took a reading with an IR thermometer and the block was at 120F. Engine fired up and idled smoothly like it was summer time.
All parts were scrounged except for the two 500 w halogen bulbs (wired parallel for a total of 1000 w) that's 2 for $5.
Nice thing about it is if the bulbs ever burn out, I can replace them cheap!!!!! Since they are running cooler than they're designed for, I don't think they'll burn out for a long while.
Happy new year!
I paid $21 (included s/h) for a new lower rad hose heater on ebay.
Greasecar Kits and Products