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High-Mile Coyote Horsepower
Brenspeed’s 2011 Mustang GT with 160,000 miles makes the power of a low-mileage car
A couple weeks ago we brought you news of Brenspeed’s newest project car, a 2011 Mustang GT that has over 160,000 miles on it. Brenspeed’s Brent White laid out a plan to see if a high-mileage Coyote was a viable performance candidate without doing a total rebuild of the 5.0L DOHC engine. Most Mustangs with high-mileage have been mistreated to the point where you can almost see the car’s tongue hanging out. However, Brent made sure to find the best maintained example he could before tackling the project, and the results show he made the right choice.
First things first, Brent put the car on the dyno, where it made 359 horsepower at the wheels. “That’s right on par with a 2011-2014 Mustang GT with 20,000 miles on it,” Brent says. Then the Brenspeed folks did a compression test, which came back with great results, showing the engine was indeed ready to handle modifications. Tearing down the engine enough to check the timing chains and guides, as well as the oil pump and gears, also showed the car was well-maintained by the previous owner.
This round of modifications centered on replacing the engine timing components like the chains, guides, and tensioners with Ford Performance items. The factory oil pump gears were upgraded with billet gears from Triangle Speed Shop. Brenspeed opened up the intake side of things by installing a Ford Performance Cobra Jet Intake Power Up Kit, which includes a Cobra Jet intake, a dual 65mm throttle body, and a cold air intake. Brenspeed also upgraded the car’s cooling system with an Afco radiator, a Reische 170-degree thermostat, a Mezeire electric water pump, Royal Purple’s Purple Ice coolant additive, and a Ford Performance GT500 cooling fan. Brent finished off this round with an SCT Livewire to load a custom Brenspeed tune into the PCM.
After this first round of mods, the engine responded by making roughly 400 horsepower at the wheels, a gain of 40 horsepower. The next update will include Kooks exhaust upgrades, and BMR Suspension additions. Stay tuned for more updates, but right now you can see the current project updates in the following video.