Turn those performance dreams into reality with our engine development packages. Using our in-house engine dyno we fine-tune everything from fuel curves to ignition timing, ensuring every horsepower and foot-pound of torque is dialed in. Whether you’re chasing street performance, track times, or reliability under harsh conditions, we combine engineering know-how with real-world testing to help your build deliver exactly what you want—and then some.
Engine development isn’t guesswork—it’s science. On the dyno, we measure precise torque and horsepower at every RPM while adjusting fuel, timing, and airflow. We test changes one at a time to isolate gains and avoid hidden issues. The result is an engine that makes reliable power and runs safely under load, with no surprises when you hit the street or strip.
Modern engines rely on complex fuel injection and ignition systems to perform at their best. We specialize in tuning advanced EFI systems like Emtron and Holley, adjusting fuel maps, timing curves, and boost control for optimal power and drivability. We also analyze airflow, making sure heads, intakes, and exhausts work together without restrictions. Every tweak is backed by dyno data, so we know exactly what works.
Engine development is about more than just tuning—it’s about validation. We can test different camshafts, intake manifolds, headers, and other parts to see what really delivers performance gains. Our dyno lets us simulate real-world loads safely, so you know your combination works before you drop the engine in the car. It’s peace of mind and smarter performance investing.
No two engines—or owners—have the same goals. That’s why we customize our engine development approach for each project, whether it’s a mild street cruiser, a weekend track warrior, or a full race build. We take the time to understand your setup and your goals, and we tune with precision and care to help you achieve the results you’re after. At Green Mountain Gear-Heads, we believe great engines don’t just happen—they’re built and proven.
Green Mountain Gear-Heads primary focus is on domestics, but can sometimes support non domestic builds.
8 AM - 5 PM
Monday - Friday
85 Shunpike Rd, Williston, VT 05495