Got my Fiesta ST tuned @ Livernois Motorsports last week and picked up 65 ft/lbs of tq and 18 hp to the wheels peak. In lower RPM the gains are much more. The car feels so much more peppy daily driving it. We have a track rental in a few weeks and I'll do some stock vs tune runs to see how much ET its really worth. Car is bone stock except for the tune.
Update: 06/13/2014
Just got back from the track today. The results were much better than expected. In short my car picked up .8 seconds and nearly 5mph from just a tune. I made a total of 18 passes in the car with about 1/2 stock and 1/2 with the Livernois Tune. I have attached my best 2 stock ET slips and my best 2 Tune ET slips. The one thing that is hugely noticeable going back to stock was the throttle response and TQ management. Every power shift the car fell flat on its face stock and just felt plain lazy. The tune made a HUGE difference as you can see from the time slips below.
I'm not sure what others are getting out of their cars stock but the best I could muster was a 15.15 @ 94mph. My best time with a tune was 14.35 @ 98mph.
EDIT 7/7/14: Video
Livernois Motorsports --> http://youtu.be/rVDi079LKkY
Update: 06/13/2014
Just got back from the track today. The results were much better than expected. In short my car picked up .8 seconds and nearly 5mph from just a tune. I made a total of 18 passes in the car with about 1/2 stock and 1/2 with the Livernois Tune. I have attached my best 2 stock ET slips and my best 2 Tune ET slips. The one thing that is hugely noticeable going back to stock was the throttle response and TQ management. Every power shift the car fell flat on its face stock and just felt plain lazy. The tune made a HUGE difference as you can see from the time slips below.
I'm not sure what others are getting out of their cars stock but the best I could muster was a 15.15 @ 94mph. My best time with a tune was 14.35 @ 98mph.
EDIT 7/7/14: Video
Livernois Motorsports --> http://youtu.be/rVDi079LKkY