I didn't know if the tune would retard it its self. im not that familiar with the timing aspect of tunes. also I was asking about input in a erlier thread about NA and I had 2 build, turbo and NA I was wanting to go NA because I love the idea of instant throttle response but It was stated by a couple people that it isn't worth the money and they have tried it before without thrill. so I'm going to do my turbo rout in time instead. timing is something I need to readm more into when getting into higher hp numbers and engine saftey.