I've been planning a rear radiator in my c6 for a while now to make more room under the hood, improve cooling and weight distribution. The plan is to have the radiator and ewp mounted in the back with 2 hoses running to a engine water manifold but the problem with that setup is controlling coolant temperature while adding little to no flow restriction. I've seen setups that have a thermostat with a small bypass but that seems far less than ideal. Since the pump would be in the back you would want full flow between the pump and engine at all times while being able to control water flow through the radiator. After looking and reading these last few days I think I came up with something. forgive the crude drawing

Hot coolant comes into a tee where it has 2 2"solenoid valves one going through the radiator and the other going to another tee that connects to the radiator outlet and ewp inlet. The solenoids could be controlled by a simple thermostatic switch and 5 pin relay. The valves are oversized compared to the pipe in the system due to the restriction they would cause if they were the same size as the pipe at 1.25" Here's the solenoids I'd like to use https://ussolid.com/2-solenoid-valve...iton-seal.html
Its a bit overly complex for a problem that might be solvable with a remote thermostat but I like to overthink things. Any better Ideas?

 

I have no first hand experience but if you google/youtube search Taylor Ray, he has a 1k hp C6 turbo drift car with a rear radiator and fans and he shows how he built the entire thing.

Seems to work very well until the radiator gets clogged with rubber but aside from that under normal conditions it works very well.

 

I would also suggest checking out Taylor Rays setup.

 

I've started watching his build but he hasn't mentioned the cooling system yet, I'll keep at it though. I will probably try this when I eventually do a rear radiator just to see how well it works, I've seen nothing like this and want to test my idea.