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

Here is a study of what happens when the Surbo acts on a normally-aspirated petrol engine (for turbocharged petrol engines, click here). It explains why the Surbo can bring the engine to its rpm red line with just 1/2 throttle, when most normal vehicles need full accelerator pressure for the same. The reasons are improved air filter power (all air passing through the filter due to the Surbo's airtight installation), the Surbo's output jet pressure and internal vortex suction, and better air scavenging through the Surbo Sytem's components (in {}). You may also read the related page How Surbo Works for easier understanding.

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

As the throttle is used to control the Surbo system, read column 4 (Throttle, in light grey) of the table first and see how the other components of the Surbo system react, for each stage. Each column header is colour coded according to the components in the diagram.

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 shown}
initial acceleration (Stage 1) air flows straight through is relatively opened absolute pressure rise due to larger throttle opening is sole energy source
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 absolute pressure drops slightly due to smaller throttle opening cylinder pressure increases due to lessened acceleration exhaust back pressure increases, ready to blast air out
subsequent, faster acceleration (Stage 3) jets air at output and spins air internally creating a deep suction vortex acts as air pressure accumulator relatively opened and varied slightly around half way point half throttle means moderate absolute pressure and air mass more air to burn completely with excess fuel during initial acceleration, leading to more engine power blasts air out instantly because exhaust was already under full back pressure
scavenging: pulling gases through (Stage 3 and afterwards) vortex's suction pulls air in acts as air pressure accumulator half throttle opening ensures a back pressure at the Surbo outlet to make the Surbo continue to jet the air half throttle means there is still spare suction to ensure good air induction and passage to cylinders low air resistance through valves because of moderate air mass and easy cylinder compression because of moderate air mass at half throttle low air resistance because of moderate air mass

Surbo System

where 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.

Read the similar study for diesel vehicles.


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.

Site Map:


Customer reviews


More torque and horsepower (dyno test)

Quick throttle response

10% fuel saving

Easy revving (1/2 throttle to RPM limit)

Instant auto gear kickdown

Faster acceleration

More power uphill

Higher top speed

Brisk overtaking




Petrol turbo

Diesel/ turbodiesel




How Surbo feels (by car type)


Natural gas

Surbo pictures Installation Photos

Compatible new cars

Vehicle inspection compliance


What's Surbo?

How Surbo works

Twin Surbo

Surbo5 for large engines

Reduced turbo lag

Surbo vs other accessories

How Surbo can be used

Optimal air compression

Allows lower octane (less engine knock)

Longer engine life (lighter throttle)

Less diesel smoke

Reduced CO2 emissions



Company history

Surbo's origin

Other applications for Surbo

Surbo wins race in India

Runner up (S'pore race)

Racing gokarts

During the installation

Aftersales/ removal

Lifetime warranty

Re-installation (fits most cars)

Refund policy

Check here for days closed


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Note: the Surbo is not a moving fan. Beware of other sellers who use our trademark Surbo to sell their products.