If a Surbo-equipped automatic vehicle is driven the usual way, the acceleration from rest will be instant, the revs will go a bit higher, and gear kickdown will be quick. The improvement will be as in the Dynamometer Test Results, or just about 7 percent improvement.
For manual vehicles, or if the automatic gearbox allows high revving, or if the gear is held constant manually, and by playing with accelerator pressure as shown in the video below, it is possible to reach the rpm limit with just 1/2 throttle with the Surbo!
Watch the video above showing how an engine revs with Surbo. To return to this page afterwards, click the "back" button. A Surbo-ed motorcycle has been chosen so that the throttle action and revving on the tachometer can be shown together. Note the part-throttle press accelerator/ release accelerator slightly/ press accelerator action to activate the Surbo. For cars, just use your right foot to vary the throttle opening in the same way.
In simple terms, for maximum power, press the accelerator to 50%, then release to 45% for a split second, then press back to 50% and then to 55% to rev high. You'll never need to floor the accelerator again. If aiming for less than maximum power output, you might try 40-35-40-45, or 30-25-30-35 and so on.
The Surbo is fitted with its output end towards the throttle, so that air flows through the Surbo towards the throttle and then into the engine. During initial acceleration, the air will go straight through the Surbo. Upon slightly closing the throttle, a back pressure occurs in front of the Surbo, so that the straight flows take cover under the Surbo's curved fins and become crossed jets at their sharp tips, matching the back pressure. Upon reopening of the throttle, the engine speed picks up due to the accumulated pressure. And due to this pressure, the air streams going through the Surbo continue to take cover under the fins and jet, so the pressure is sustained, and quick revving results. By 1/2 throttle, the engine will reach the rpm limit! Cruising speed is reached sooner, so fuel is saved, usually about 10%.
Related pages:
Watch the video above showing how an engine revs with Surbo. Or watch it with the How it works page.
Above: video of Volvo XC90 T8 with Surbo, sprinting to 130 kph.
Above: video of Volvo XC90 T8 with Surbo, sprinting to 211 kph.
Above: video of Volvo XC90 T8 with Surbo, sprinting to 224 kph.
More torque and horsepower (dyno test)
Easy revving (1/2 throttle to RPM limit)
Allows lower octane (less engine knock)
Longer engine life (lighter throttle)
Re-installation (fits most cars)
Note: the Surbo is not a moving fan. Beware of other sellers who use our trademark Surbo to sell their products.
