We had a dyno set up saturday and sunday near where I live. It wasn't ideal timing since we are right in the middle of harvest season, but I made a quick trip over to see what my new spd tune would do. It is the truck in my sig, only mods are tune, intake, exhaust. Everything else bone stock right down to the factory headbolts. We made 3 runs with the spd and the were all almost identical 420/750. Earlier this spring my looney made 426/750 and ran the time in my sig. I decided to load it up for the heck of it and it layed down 434/767. This truck has always ran great on the looney and it has been my favorite tune so far over srl and tony's extreme. However, even after the dyno I still like the spd a little better. Had I not dynoed, I would have said the spd is more powerful than the looney. I probably won't get to run down the track again until spring to see what the spd can do, but it feels stronger than the looney contrary to what the dyno says.