New addition in Engine, Transmission, Drive Line, Etc Posted Wednesday at 02:31 PM Just some info. One of our members Toni drove his Mach 1 from Wisconsin. He has fuel injection so he has a temperature reading for incoming air. He also put a switch on his ram air flaps so he can keep them open all the time. He said the air temp going into the engine drops either 15 or 18 deg. with the ram air flaps open so it does held a lot with colder air to the engine.