Best place for efan thermoswitch

[FerociousP]

I'm doing a taurus efan with a 200 degree on switch I bought from Summit Racing.

I'm getting conflicting info about the best place for my efans thermoswitch. The thread of the switch matches a closed port on the bottom driver side of my koyorad.

My thinking is that bottom of the radiator is going to be where it's the coolest. Friend advised NOT to use that bottom port for the fan switch because of that. However the machine shop says the bottom of the radiator will be same temp as the engine.

Based on the machine shops advice I left it with them to open the that bottom port. Is this sound advice? Should I call the shop and tell them NOT to open the port?

[JustJeff]

I'm doing a taurus efan with a 200 degree on switch I bought from Summit Racing.

I'm getting conflicting info about the best place for my efans thermoswitch. The thread of the switch matches a closed port on the bottom driver side of my koyorad.

My thinking is that bottom of the radiator is going to be where it's the coolest. Friend advised NOT to use that bottom port for the fan switch because of that. However the machine shop says the bottom of the radiator will be same temp as the engine.

Based on the machine shops advice I left it with them to open the that bottom port. Is this sound advice? Should I call the shop and tell them NOT to open the port?