I ran a 8 minute main with no pit. After the races were all over for the night I fired the engine back up and was able to do 4 more laps (my average laps were 25-26secs). I would say I can get at least 9 minutes no problem. I have video that I will hopefully be posting in the next day or so. My camcorder's usb connector is damaged and won't talk to my computer. I gotta take the tape to my friends house so he can upload it with camera.