Engine temp

Duehew wrote:At least so far the temp stays around 185 when driving.

With the fan set to shut off at 165, this is part of your problem.  It sounds like your fan controller sensor is the type that goes in the engine.  There are those that work like you described with a radiator probe.  The fan controller is reading engine temp and that will be higher than radiator outlet temp.  The probe type controllers usually insert somewhere near the outlet.

The engine thermostat is maintaining coolant temp somewhere above the shut off point of the fan controller.

If your controller is adjustable, you need to move your set point up to somewhere above the normal operating temp.  If it's not adjustable, you have  some options.  

You could move the sensor to the outlet side of the radiator.  This could be done by adding a steel or aluminum tube to the lower radiator hose with a bung to screw the sensor into.  This is how I have my 46 coupe set up and it works fine.

Another option is to get another controller that is adjustable.  I prefer the adjustable types, anyhow.  These car, like most every other hot rod, are each unique with their own personalities.  Having the ability to make small adjustments can make all the difference when it comes to solving problems.

You could also change out the engine thermostat to a 160* in the hopes that the normal temp will come down to the set point of your controller.  This is not a good solution though since post engines will run better with about a 180* thermostat.  Also, there is no guaranty that the cooling system will be able to get the water temp down that low and keep it there most of the time.

Thanks loads for your feedback. Very helpful.