Quote Originally Posted by Apptruck2020 View Post
I always just change the timing at idle and command turbo closed for exhaust hiss sound. Just my .02
Getting hiss is easy. What we want to do is open the vanes for rumble at idle. I've never figured out how to do it consistently. I can get them to rumble in reverse, and when rolling, but not in park or in drive sitting still. I've seen what several of the big name tuners change, and I've done the same with no luck.