I apologize for the photo quality my camera is a bit limited right now .

 

No worries,i can see what you have there. I looked on Jeg's website and that kit appears to have a 180 degree temp sensor. This means the fan is going to turn on at that temp.Look at the temp sensor and see if it has on/off temps stamped in it.

The thermostat in the car opens at 180 degrees,so this sensor is going to turn fan on at that temp-that means the fan is going to run constantly until water temp drops below that...which is only going to happen when you shut the car off long enough for engine to cool down below the turn on threshold for temp sensor. The electrical system in the car cannot handle the extra load of fan running constantly+everything else,it wasn't designed for that.
Suggest you return that non adjustable kit to Jeg's and get the Proform one that's only $8 more but allows you to adjust turn on temps.There are better quality fan controllers you could go with,i know you're on a budget. Set the fan on temp 195-198 degrees to begin and see how that works.

For a solution on how to mount a cooling fan sensor,look on Amazon for Upgr8 aluminum water temperature sensor adapter. It goes between a section of hose you cut out of upper radiator hose. You will have to drill out the 1/8" pipe thread to allow the(i believe) 1/4" pipe thread sensor the kit will come with. You'll also need to run a ground wire to sensor adapter(it has a threaded screw terminal on it) as the water temp sensor will likely be a single terminal and need to be grounded. This one is $11.
Maybe wait til you have whatever you're going to use for fan control in hand so you know what size pipe thread sensor is and see if you can't find a sensor adapter that is 1/4". This is the most common aftermarket sensor thread.

You'll need to get your oil cooler situation squared away 1st so cooling system is not being overloaded to be able to dial in on/off rad fan temps.

Hope this helps without complicating things,have some experience in mechanical/electric fan conversions and what's needed to make them work "right"

Flex a Lite #32082 temp sensor adapter for 1 1/2" rad hose with 1/4" pipe thread. Best price Amazon $46

 

You are right the sensor is stamped 185 degrees. I will focus on the oil cooler and double back to the fan setup. Funny enough I already have a metal tube in-between my radiator hose from tilting it forward for clearance. I found out the hard way that the s5 water pump snout although it is aluminum instead of steel it is like a inch or two longer. I have some considerations at the moment. I am more than likely going to pull the car off the road the next few days and redo the mounts, line setup and do some hvac ducting while I am already under the car. I am thinking of hvac ducting because of my front bumper having a prebuilt air dam in the middle. I also purchased a mishimoto thermostat because of the ability to switch temperature settings quickly from like 160-190 degrees. I know a lot of this doesn't make sense without pictures. If you have social media I have photos on Instagram, @3wheeldriving.

 

Why would you want to switch temps thermostat open? Let's say you adjust it to 160 degrees,it opens at that temp but that doesn't mean the engine operating temp will be held at that temperature.160 degrees is the temperature that coolant begins to circulate thru the whole cooling
system,once the thermostat is open,it's open and is no longer a factor in the operating temp of the engine.Hope you can understand the concept.

Furthermore if the mishimoto thermostat is not the same dimensions as the oe thermostat that has the flange that closes off the waterpump bypass as it opens,it won't allow proper coolant flow in the system. Looks like it costs $50.
Try not to get sucked into these overpriced parts because of their name,that particular part won't work any better than oe Mazda. Quite a few of these tuner parts offer no real improvement in your cars performance,they do succeed in opening your wallet more.
I've owned all three generations of RX7s and never used an aftermarket thermostat in any of them,no need,no gain.

 

I'm sorry I didn't specify, it is a oil thermostat for the oil cooler.

 

All good,carry on,are those temp sensor adapters something that might work for you? Maybe you could substitute one of the adapters for your metal tube?

 

I mounted the oil cooler setup over the last few days. Oil temp drops to 165-170 when driving and water temp is 180 now. When I stop and the car is sitting at idle water temp goes to 190 and oil temp climbs to 190-200. I can definitely tell a difference in lower temps. I have not done any long term testing because I need an alignment bad which I will get tomorrow. I still haven't done any major ducting yet besides closing small gaps here and there. I am not sure if the temperature switch adapter tube to the fan will work because I do not know if it will fit in the radiator hoses.

 

Do you mean diameter wise fitting hose? Different size sensor adapters are available. Didn't you say you had a piece of metal tube already in top hose at radiator. What is id of that tube,could you remove it and put sensor adapter in its place?