The sensor element was placed as far down the tube as possible, nearest the engine block, but facing front. The duct tape should insulate the sensor at least from the direct wind coming in from the grille. We'll account for this variable in the next test when we place the sensor in the rear of the tube.

On startup, temp is essentially the same both on the tube and outside.

To warm up the car we'll drive down the hill (thru a mile or so of stop/go town driving) to Ocean Ave., which is essentially a tourist-laden street with no stops for a couple of miles. Slow speeds of 20mph mean a nice gentle warmup. that we can use to get an initial idea of whats going to happen here. As you can see in the pic there's no wind so thats not going to affect things.

Down the road a ways and well before the end of the warmup route the engine is fully warmed up. Temp is only 3 degrees above outside and speed is a slow, constant 20mph.

At the end of the route near Asilomar temp has only climbed a couple of degrees, mostly thanks to uneven speed. Temp seems to fluctuate very quickly with a bit of throttle.

After Asilomar we climbed fairly steeply at 30-35 mph for a mile or two. Tis is the stop light at the top of the hill, and ends the in-town portion of the test.

Cruise control at 65, shortly after arrival on the highway and after a drive to the freeway that entailed steep climbs, and a descent, all at about 45 mph.

Constant at 65 mph and on flat ground, temperature quickly falls until it reaches a steady 73 degrees.

Same flat ground, increase speed to 75 mph. No temp change.

Same ground. Lets try 85. Note the temp is inching up outside.

Final shot of the run -- slow to 60, WOT to 90 then decelerate to a stop at the offramp stoplight and take a picture.