Getting ready to buy a meth kit for my 08 SS. I'm putting in my ZFR and Im looking for a little bit of insurance against detonation. My thoughts are the meth would seldom activate unless near full throttle is applied. In the brief moment between vacuum and boost, would a progressive kit even have time to react? My thoughts are no, so a fixed boost activated switch is all I would ever need. Would love to hear some opinions........

 

progressive would be great for your setup and yes it can ramp up fast