honestly... The compuSTAR alarms are great.. but not all that they say.. I paid somewhere along the lines of $499.99 for mine way back in august of 99 when I bought my 99 GS. It says that it has a turbo function.. but I found that was for a second car with the same brand alarm. But,.. this alarm does have a good feature.. you can set it so that once you take the key out of the ignition, the car stays running.. kinda like a "pit stop" feature. If you wanna run to the mailbox or deli for a soda or something without turning the car on and off (killer on starters). I guess that could be the "turbo timer" in a sense, but since I dont have turbo in my car yet, I haven't tested that idea. But I do know that you can take out the keys and keep the car running though (great on hot summer days).
Def a good idea.. now with the new tech and the newer models out.. compSTAR seem to be a good investment.