[nemesis]

Basically I am thinking about using a small servo that will operate grill block, it would keep grill block closed at all times unless coolant temperature sensor senses that coolant temperature went over target temperature, lets say 220 deg F, servo would use factory coolant temperature sensor that is already on a vehicle to keep things cheap and simple.

I'll be doing this on a 96 ford ranger with a 2.3L engine. I will try to keep factory grill in place and just hide the grill block right behind it. What kind of gains do you guys think I should get out of it?

Thanks.