Someone was having issues with their gauge and I could not remember where I saw this but ran across it this morning. It was on team camaro and I thought it was interesting.
Ok, just an update to this thread in case anyone wonders about this in the future. Tonight I replaced my sender unit and decided to figure out what temp is where on the stock temp gage. I used the sender unit and my grill and a pot of water and started with boiling water and went down from there. Here is what I found:
218F at one notch past vertical
200F at the Vertical hash mark
195F one notch in front of vertical
187F two from vertical
180F three from vertical
173 at the first large hash from Cold
162-167F one mark under the first large hash
159F between the 2nd and third mark
155F at the second mark
150F between the first and second mark
140-145F at the first mark
140F and less - under the first mark
Hope that helps some people know what their stock gages are at!!