Another +1 for 5Star. They do great safe tunes. I've had them do a few for me over the years. I haven't had one done for my 5.0 F150 yet but they made my old 3.5 Ecoboost a racetruck. How do you like the throttle response and power delivery on yours now after the tune? Ballpark hp/torque increase on it?
It's night and day difference. The throttle response is improved but still very driveable in all climates. It just pulls better, everywhere. I'm running their E85 performance tune right now with a 3" exhaust from the y-pipe and an intake. Here is a dyno from a truck with a very similar set up (I have a different intake and I also have a Corsa system with the same SPD 3" mid-pipe). I can only assume I'm within a few HP and TQ. My alcohol percentage usually reads around 76-78% on my SCT tuner. I'm running E85 exclusively now because it's about $1.30-1.50 cheaper per gallon than 93 and it makes more power. Win Win. Only lost about 2mpg which I'm ok with. I have the 36 gallon tank so it takes a while to run it out.
Stock truck on 87 gas