[Darwood]

Looks like I need to post some more info. 180 ohms for the diode replacement is another option. With this resistor 238 degree F should look something like the attached. Right now I have the 100 ohm and 150 ohm resistors in my truck. I like it so far. When it got up to 221 the needle was about 2 needle widths below the red line and 218 was at about the 34 mark. 200 degrees is centered and 194 is just below center where the stock gauge would never move from once warmed up.

I'd also like to point out that the temp to needle values (except for my limited real world experience) are all calculated off or Raven's data and might vary slightly from their real world performance due to some assumptions I have to make when calculating. For the most part what I've expected and what I've seen have been pretty consistent when I've tested out the modified gauge vs the OBD II scanner.