Twin-Turbo Fox Body Ford Mustang Sends Hub Dyno Spinning Out of Control

This wicked Fox Body Ford Mustang has 2,500 horsepower on tap, which means that not using the yellow safety beams on this hub dyno almost proved to be disastrous. 

For the most part, dyno testing a vehicle is a pretty safe process – and one that’s repeated time and time again at different shops around the world on a regular basis, to boot. However, any time you’re dealing with heavy machinery, there is certainly an opportunity for things to go horribly wrong. This is especially true in the event that we don’t follow basic safety rules – even if something bad doesn’t happen, it only takes one slip up for disaster to strike. Unfortunately, the folks at Billet Pro Shop learned that lesson the hard way recently when they strapped their ultra-potent Fox Body Ford Mustang to a hub dyno.

Billet Pro Shop has been wrenching on and competing in their wicked twin-turbocharged, Coyote-powered Fox Body Ford Mustang for some time now, and for the upcoming 2025 season, they’ve been tweaking it even further. Recently, BPS used Turbosmart waste gates to combine the hot- and cold-side boost control, using a couple of solenoids to dynamically manage the boost ramps and optimize backpressure – which also unlocked some additional horsepower at the top end.

Pumping out a whopping 2,500 horsepower in its current form, this Fox Body Ford Mustang was recently back on the hub dyno to see how these changes panned out, which is obviously nothing new for the drag strip menace. However, it seems as if the owner of the dyno neglected to install the yellow safety beams on the dyno before letting the pony car rip, and the results, well, were about as bad as one might imagine.

BPS released the footage of this incident, and it’s quite shocking to watch, to say the least. Once the rear wheels get up to speed, the hub dyno starts to rotate violently and nearly take out the gentleman nearby. Things could have gone much worse, but thankfully, no one was injured, and the Mustang itself only suffered some damage to the rear quarter panel that has already been repaired – leaving this footage as an important lesson for anyone engaging in such practices.

“Built motor. Built the turbo setup. Forgot to build the dyno. RIP,” BPS said in the video’s caption. “Some things are too wild not to share. We could have kept this to ourselves, but we wanted to show how easily accidents can happen, even with the best intentions. We waited for the dust to settle before sharing, and at the end of the day, we’re just grateful no one got hurt. Material things can be fixed. Lessons were learned, and we move forward.”

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Brett Foote

Brett Foote has been covering the automotive industry for over five years and is a longtime contributor to Internet Brands’ Auto Group sites, including Chevrolet Forum, Rennlist, and Ford Truck Enthusiasts, among other popular sites.

He has been an automotive enthusiast since the day he came into this world and rode home from the hospital in a first-gen Mustang, and he's been wrenching on them nearly as long.

In addition to his expertise writing about cars, trucks, motorcycles, and every other type of automobile, Brett had spent several years running parts for local auto dealerships.

You can follow along with his builds and various automotive shenanigans on Instagram: @bfoote.