i dont mind turbo timmers for one i use a Greddy Fully Automatic turbo timer and it has a lot more inbuilt function for eg... digital speed, battery voltage, and a whole heap other things....i got it all properly installed and its hidden in a safe spot which cannot be accessed easily....during summer or hot days i have it preset to 60 seconds and during winter down to 40 odd seconds.....but as other guys have said that you dont really need a turbo timmer i normally sit in the car till the timmer runs out and then lockup and leave....