JB4 Results on 2.3L Bronco! - Lethal Performance


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Established Member
Jul 6, 2021
South Florida

Hey All!

Terry over at Burger Motorsports has been quite busy testing the JB4 on a 2.3L Ford Bronco this week, and needless to say, it made some super impressive numbers, as expected, but not known for a fact until now…


The truck itself is a completely stock 2.3L w/ Sasquatch Package, an Automatic Transmission, and on a larger tire. Although, the truck was completely stock otherwise until the JB4.

Before the JB4, completely stock, the truck made 247 WHP and 304 WTQ on 91 octane, which is fairly impressive from the 275 HP rating given from the Ford.

On the next run, with just the JB4 tuner installed on 91 octane, it immediately jumped, now producing 272 WHP and 336 WTQ on MAP 1, as it’s preset to.

Next run, they mixed up a little E85 to get up to the equivalent of 93 octane and produced another 25HP and 30 FT. LB. TQ increase at 296 WHP and 366 WTQ.

Finally they added more E85 to gain some more octane, maxing out the timing and produced 309 WHP and 374 WTQ!

Just to give you a rough idea of how impressive these results are, we reached a peak gain of 312 RWHP and 411 RWTQ on a 2.7L First Edition Bronco with the same maps and device!

The JB4 has shown completely capable of cranking out 2.7L figures out of its 4 cylinder little brother, and further surprised us with its performance potential.

More info on the JB4 here! :
Deep Dive Into the JB4 Tuning Device for 2021 Ford Bronco | Install, Review, and Testing

Get your JB4 here! : Burger Motorsports JB4 Tuner (2021+ Ford Bronco 2.3L/2.7L / Bronco Sport 2.0L)

As always, if you have any questions or concerns, feel free to reach out to any one of us here at Lethal Performance at 561-753-8105 or by email at [email protected] .​

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