Wife and I took it out for a drive last nite, without doing anything to it before hand except ck coolant level, And it was approx 1" above the coolant tubes,,,, So we took off. As I wanted to try again before doing anything to it

Drive into town , Non expressway but still run approx 50 mph for almost 12-13 miles. Per the gauge car never got to half way up the gauge, Just barely under that.
Made a couple stops with maybe lasting 10-15 minutes heat soaks. Fired right back up , Gauge was nearly 3/4 the way up but cooled right back down the below half. Did this 3 times with same results.

On the way home right away it crept back up to 3/4 way up the gauge and stayed there all the way home ( again a little over 12 miles ,,,give or take )

Once home took temp gun and said temp right at thermostat hsg was about 215 or so with gauge still showing right about 3/4 ,,,maybe just under that.
Inside the rad top is spotless so I have my doubts its a radiator issue. It was recored the time the car was done.,,,,, And driven very little

So, with that ,,,, Something tells me I have a Tstat acting up

I live in an area where antifreeze is really not needed. SO,,,,,,,I am going to drain, flush it even remove the block drain plugs as well and refill with distilled water , Refill with an additive thrown in for good measure replace the thermostat with a new one. and go from there .

That should work for you. Distilled water and one of those bottles and see how it works. Be interesting to see what you find when you pull the thermostat. Did you check to see if your thermostat seems to be working properly now? Top hose should be cool until the thermostat opens and there shouldn't be flow in the radiator. So fairly easy test to run.

While waiting for the thermostats to arrive, maybe remove the stock temperature sensor and submerge it in boiling water with its wiring still connected in order to see where 211 degrees is on the needle of the original dash gauge?

I would bet that spring helps you fix this Bill.
Ron

If you could overdrive the water pump rather than underdrive it then you'll be better off for the way you drive the car. Hemi engines were set up for high rpm but if the car isn't going to be raced then overdriving the water pump is a good idea.

I'll see what happens to it after my changes .
If it still runs warm will look at changing pulleys , or maybe go to a higher flow pump

thanks,
i will have to try this

Can also check the new and old thermostats this way