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I've got a 2021 F-150 with the 3.5 EcoBoost and I'm torn between 5 Star Tuning and Bully Dog for a mild tune that won't kill my daily driveability. I do a mix of highway commuting and occasional towing, so I don't need anything crazy. Has anyone run either on a similar setup? How's the throttle response and transmission behavior compared to stock? I've read good things about both but can't decide.
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Log InI had a Bully Dog GT on my old Silverado and it was okay, but the canned tunes felt a bit generic. Switched to 5 Star Tuning on my current F-150 and the difference is night and day. They customize the tune for your exact mods and driving style, and the shifting is way smoother. Their customer service is also top notch if you have questions.
Another vote for 5 Star. I tried both on my 2019 F-150 and the Bully Dog tune felt like it just added boost without refining anything. 5 Star actually remapped the throttle and transmission logic, so it drives like it should have from the factory. Plus they offer free revisions if you change something like adding an intake or exhaust.
Bully Dog is fine if you want a plug-and-play device with a few options, but 5 Star is known for really dialing in the EcoBoost. I've been running their 87 octane tow tune for a year now and it's perfect for daily driving. No weird surging or harsh shifts. Definitely worth the little extra money.