Maybe the automatic trans. explains some of the things you experienced with your Juice and the Smarty. I ran the Juice for six or so months before I bought my Smarty. In my opinion, the Smarty blew the Juice out of the water as far as turbo spool-up is concerned. With my Juice on 0 and my Smarty on 5 my Attitude's boost limit alarm goes off in a real quick hurry at 35psi. when in a high gear. I don't know if it's the transmission difference but with the Smarty my power comes on almost instantly.