About DD84 | Performance Engineering & What’s Next
Built for the combination in front of us
Down Dirty 84 LLC (DD84) is a Georgia-based performance engineering business focused on diagnostics, calibration and practical solutions for modified vehicles. We start with the vehicle, controller, hardware, fuel system and symptoms before recommending a file, service or part. Supported applications are confirmed case by case.
What DD84 can help you start today
- Remote tuning and calibration: submit your setup for platform and equipment review, then follow the applicable data-log and revision process.
- Diagnostics and drivability: find out whether the problem starts with the mechanical setup, wiring, sensors, controller or calibration.
- ECU, PCM and TCM support: ask about compatibility, access, programming and transmission calibration for your specific vehicle.
- EFI and swap projects: request help with LS combinations, Holley EFI and supported aftermarket controllers.
- Fabrication: tell us what you need built or repaired, from a small part to a larger custom project. Include photos, dimensions, vehicle details and your goal so DD84 can review the scope.
Unsure where to begin? Start with the DD84 readiness review, solve a vehicle problem, or send your build details. You can also browse the store.
What happens after you contact DD84
- Tell us the vehicle, controller, modifications, symptoms and goal.
- DD84 reviews the information and identifies the correct service, product or next diagnostic step.
- Scope, compatibility, equipment needs and applicable terms are confirmed before work proceeds.
In development
DD84 is planning a larger performance shop with expanded equipment and future dyno capability. DD84 is also developing connected tuning software and hardware concepts. These are development plans; the new facility, in-house dyno and connected product are not currently being offered for booking or purchase through this page. Availability will be announced after the equipment, product and processes are ready and verified.
For current work, contact DD84 or email downdirty84llc@gmail.com. See shop updates on Facebook and visit the main DD84 website.