The Nissan Urvan 2.7 diesel bus had the twin Surbos directly replacing the pipe from the airbox to the pipe leading to the manifold. Before driving off for testing, the owner revved the engine (using just part of the accelerator travel) at standstill and was happy that the engine could go to between 4000 to 5000 turns per minute, and said that before the Surbos it could do only 3000 rpm. It was later also easier to jump to a higher gear sooner, enabling relaxed or even lazy progressions skipping gears, like going 1-2-4. I even saw him using 5th gear on our usual 2nd gear runway--just to really test the product.
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 BHP (dyno test)
Quick revving (1/2 throttle to RPM limit)
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