10% FUEL SAVING ON AVERAGE

What is Surbo? Achieve red line by 1/2 throttle for manuals, and higher revs than usual for autos! Surbo price in Singapore Surbo in various countries Why choose Surbo? More horsepower with Surbo How Surbo works user-reviews-Surbo cars-fitted-with-Surbo

Surbo system's energy analysis for petrol turbo engines

Here is a study of what happens when the Surbo acts on a turbocharged petrol engine. It explains why the Surbo can bring the engine to its rpm red line with less throttle pressure. The reasons are higher air compression from the Surbo's air jets, and thus a stronger exhaust and earlier spooling of the turbocharger, which is driven by exhaust gases. The Surbo Sytem's components (in {}) are individually examined. You may also read the related page How Surbo Works for easier understanding.

Diagram below shows the air pressure accumulation within the Surbo system as the Surbo is activated through Stages 1 to 3.

P1 is the initial inlet vacuum, P2 is the Surbo's pressure setting, and P3 is the back pressure formed by a relatively closed throttle.

Surbo System for petrol turbo engines

Stages/ {Surbo System Component}

{Surbo (red), presses air into grey pipe}

{Oil chamber, in orange} {Throttle, in light grey} {Intake manifold, in pink} {Engine, bottom block in pink} Exhaust (not coloured), with turbocharger
initial acceleration (Stage 1) air flows straight through Surbo Throttle is gradually opened for acceleration absolute pressure rise due to larger throttle opening Engine is sole energy source the exhaust gases may not be fast enough at a low rpm, so the turbocharger is not delivering boost yet. This is inherent in turbo engines, and is called turbo lag.
pressure accumulation (Stage 2) begins to output cross-jets and form vortex internally fills up with engine back pressure is relatively closed for 1 second to generate a back pressure towards the Surbo mild pressure buildup due to turbocharger gaining speed cylinder pressure increases due to lessened acceleration, and yet turbo boost that's just beginning exhaust back pressure increases, ready to blast air out, and begins to spool up turbocharger earlier than usual, thus cutting turbo lag.
vortex (Stage 3) spins air internally creating deep suction acts as air pressure accumulator relatively opened and varied slightly around half way point increasing pressure boost from turbocharger higher cylinder compression because of turbo boost turbocharger blows more air into engine, which puts out a stronger exhaust, which in turn increases the turbo's spinning speed. This is a stronger cycle than before.

Read the similar study for diesel vehicles.

Videos:

Watch this video showing how engine revs with Surbo

Watch the video above showing how an engine revs with Surbo. Or watch it with the How it works page.

Video of Volvo XC90 T8 with Surbo, sprinting to 130 kph

Above: video of Volvo XC90 T8 with Surbo, sprinting to 130 kph.

Video of Volvo XC90 T8 with Surbo, sprinting to 211 kph

Above: video of Volvo XC90 T8 with Surbo, sprinting to 211 kph.

Video of Volvo XC90 T8 with Surbo, sprinting to 224 kph

Above: video of Volvo XC90 T8 with Surbo, sprinting to 224 kph.

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More torque and horsepower (dyno test)

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Twin Surbo

Surbo5 for large engines

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