good question.....we has been experience before.it will be depend to the installer how there do it. but the correct way is arm the alarm then the engine still running after just switch off by the timer.
I have a set of 4 oem mazda RX-7 FD rims c/w bridgestone 225/50R16 S-03 tyres (50% tread & originally purchased new) for sale. Good as spare for track days, drifting etc.