O2 Dynamics Ltd

We are the only portable engine tuning and dyno testing company in western South Dakota, possibly all of South Dakota!

We have a shop behind Taco Bell on E North St in Rapid City, SD yet we are set up to go where you need us! Our services can benefit all types of consumers. Racers and Car Enthusiasts - we can tune gas engines to give more power. We can run dyno tests before and after modifications to determine what is the better choice. Commuters / Sports Families - we can tune the engine to maximize fuel efficiency therefore saving you money.Towing Vehicles - we can tune the engine for specific towing situations to improve your towing experience (ex. correct shifting)Fleet Vehicles / Businesses - we can tune the engine to maximize fuel efficiency therefore saving you money. Everyone - we can tune the engine to improve general driving. By doing this you can start enjoying the ride again! For example, less hesitation at stops and better shifting. As for the dyno testing - this is for anyone who wants to know how fast their vehicle goes. It also helps people decide if they want to keep a modification or change it. Dyno testing can be used as a diagnostic tool by the owner or a repair shop. For example, if you hear a noise when you are driving down the interstate at times, the mechanic can bring it to us. Then he can stand next to it when we run it under the same conditions to diagnose it instead of the mechanic trying to drive and diagnose!