What gear did you dyno? Just had mine done stock in 5th... (100 degrees here in Texas so heat sink hits pretty quick) Max HP spot on, but Max TQ about 10% higher here.We've used the JB4 from Burger Motorsports on a 2.7L First Edition Bronco and overall, as anyone initially looking into these, we were super skeptical.
Although, with Burger Motorsports, they have been around quite a few years with the JB4 Device in other applications, so it's safe to say, they have the concept down to an art. Burger has done quite the development into a bunch of the Ecoboost platform vehicles prior to the Bronco, including the Ranger, F-150, Mustang EB, and more. Overall, I believe that time and experience helps build a better device and program.
After install and testing though, and now of course being a couple months after install, the JB4 is still going strong and hasn't skipped a beat, nor has it done any damage to the truck.
As far as performance, the devices can only do so much and both utilize the same readings to change the engine dynamics. We proved the JB4 worth it by putting the truck on the dyno, testing every map multiple times to prove consistency.
More info on the dyno testing and install here :
https://www.lethalperformance.com/info/bronco-jb4
Another thing to note, the JB4's construction is above-expected. The device itself is a simple, yet clean machined-aluminum casing that is anodized in a black finish. Honestly, you'd probably be able to run the thing over and show no sign of damage. Along with that, they give the edge a nice gasket to ensure the internals of the device stays dry, regardless of what you throw at it. With this satisfaction, we mounted it under the engine bay with no fear of failure. All the harnesses are given a braided sleeve covering to ensure the wires are protected from heat and sharp edges, regardless of how you run them.
Overall, I'd go with the JB4 with my personal vehicle, simply because of the company's history/success and quality of construction.
Please let me know if you have any other questions!
Joe Rocchio / [email protected]
877-2-LETHAL | lethalperformance.com
We were in 5th as well. I don't think it was that hot here when we dyno'd ours but if you did that well in those temps that's great. Wait till it cools down. I'm sure it will make a big difference.
