Alright, since we're already suspect by throwing an adjustable wrench in the proverbial wheel, we might as well go all the way and tell you about something we've used for some time now. Aimed primarily at larger diesel engines, the Turbo3000D was designed to make a cleaner-burning motor by inducing counterclockwise turbulence into the fuel stream, and as a side effect it'd increase fuel economy by at least 10 percent, guaranteed. Sure. However, we had a diesel that smoked enough to get us in trouble, so with nothing but a refundable $170 to lose, we decided to give the 3000D a try. We were warned that the smoke would initially get worse as the VADA removed carbon in the system. Then we'd have easier starting, reduced emissions, smoother idle, and better performance, all by installing this 4 5/8 x 1 1/8-inch cylindrical gizmo in the fuel line, close to the injector pump. Maybe because our motor had only 35,000 miles on it, the smoke didn't get worse, but instead the VADA instantly eliminated most of it. A fluke, we thought.
With no real noticeable effects (other than much reduced smoke), the T-3000D was left to do its thing for over a year and a half, after which we crunched the mileage numbers. Then we double-checked them, because we doubted the result-an improvement of just over 10 percent. Another fluke? Maybe so, but in this particular case the Turbo3000D did exactly what it was said to do. And, yes, we're still mystified, but sure enjoy the apparent benefits of the VADA.
Supposedly, the efficiency of fuel atomization is increased by the swirl set up by the Turbo3000D VADA, which in turn should increase combustion efficiency. A 10-percent increase in fuel mileage is guaranteed, and we actually got a bit more than that. Most noticeable was the 3000D's effect on exhaust smoke. Rated at 350psi max fuel pressure, the 3000D can be used on GMs, Power Strokes, and other "older" low-pressure diesels, but not yet on a new Dodge Ram's 40,000psi fuel system (an updated version is in the works). With no moving parts or anything to wear out or off, the visible "crosshairs" within the VADA somehow make it work, no matter how skeptical we were. It seems more efficient at engine speeds over 1,500 rpm, and/or when the motor has to work harder.