Just 2.5 minutes of my 08 SRT8 idling. This is with the CompCams 268H cam.

She starts cold with a fast idle. At around 1:20 it drops down. And at right around the 2:00 mark, the cam kicks in and she starts loping.

Average SPL is 102.4dB at idle.

Truck ran 11.91@115mph with this setup, setting the naturally aspirated, stock bottom end, Jeep SRT8 record at the time. It has since been beaten. 😞