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

SITE MAP (below)

  • (To see how Surbo works for diesel vehicles, click here)
  • How Surbo Works For Petrol Engines

    Why is it good to have a Surbo? The reason is that it can produce and store an air charge to match the usually excessive fuel pressure from the fuel pump during acceleration, so that there is more complete combustion, and improved power and fuel economy.

    The Surbo (air-suction-turbo) is fixed tightly in the air intake, and the connected air chambers between it and the engine are made airtight to make all the air flow through the Surbo so it can press the air when called to, and to store it in the engine oil chamber for subsequent revving. Without gaps, all the air suction will be directed at the air filter, making it strong. This gives the car instant acceleration from idle. The slightly higher rpm at idle shows that the engine is already more powerful by then.

    Driven the usual way, a Surbo-equipped automatic vehicle will accelerate from rest instantly, rev a bit higher, and be able to kick down gears easily. The improvement will be as in the Dynamometer Test Results, or just about 7 percent improvement.

    But even more power is available by activating the Surbo!

    Accelerator pressure controls the opening of the throttle. The Surbo (in red) is fitted with its output end towards -> the throttle, so that air flows -> through the Surbo towards the throttle and then into the engine.

    Stage 1: when the accelerator is pressed, the throttle opens and the air will go straight -> through the Surbo and through the throttle opening.

    Surbo System

    Stage 2: once the car has gathered speed, the accelerator can be eased off slightly, and the closing throttle causes the air to press <<-backwards towards the Surbo, resulting in a back air pressure, and as air tends to flow into a region of lower pressure, the straight flows turn anti-clockwise to take cover under the Surbo's curved fins and converge to become jets at their sharp tips, matching ->><<- the back pressure, and this air charge also fills up the oil chamber (in orange).

    Surbo System

    Stage 3: if the accelerator is stepped on slightly and immediately, the throttle opens a bit more, and the compressed air enters ->> the engine and it revs faster. Due to the back pressure <<- still ahead of the Surbo, the air streams continue to duck under the Surbo's fins and jet, so the pressure is sustained, and quick revving results. This turning of the air causes the round inlet of the Surbo (nearer to the air filter) to form a vortex, sucking air in counter-clockwise, hence the name air-suction-turbo. The engine will rev significantly higher, enabling easier progress in the following gear (because that will start from a higher, stronger rpm). Cruising speed is reached sooner, so fuel is saved, usually about 10%.

    Surbo System

    If the gear is held constant (such as for manual or semi-auto gearboxes, or if the automatic gearbox allows high revving), the Surbo can send the engine to the rpm limit with just 1/2 throttle!

    Watch this video to see the extreme revving power of a Surbo-ed engine at 1/2 throttle!

    Watch this video showing how engine revs with 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 very slight accelerator movements (press accelerator/ release accelerator slightly/ press accelerator) to make the Surbo compress the air. For cars, just use your right foot to vary the throttle opening in the same way.

    As an example, 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.

    Why 1/2 throttle?

    That is because a partially closed throttle can create a back pressure, to which the Surbo will charge. Also, at 1/2 throttle, the vacuum in the engine is not depleted and will continue to pull the air in powerfully. And, at 1/2 throttle, the fuel pressure is halved, and that is another reason for fuel savings.

    Potential for even more power

    As the rpm limit is reached with just 1/2 throttle, especially in the low gears, it is possible to raise the rpm limit, and get to a higher speed in those gears by further pressing to full throttle once the original rpm limit is reached.

    Related pages:

  • How Surbo feels, depending on engine type
  • With and without Surbo
  • How Surbo can be used daily
  • How Surbo works for petrol automatic vehicles
  • Surbo system's energy analysis for turbo petrol engines
  • 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.

    Site Map:


    Customer reviews


    More torque and BHP (dyno test)

    Instant throttle response

    10% fuel saving on average

    Quick revving (1/2 throttle to RPM limit)

    Easy auto gear kickdown

    Faster acceleration

    More power uphill

    Higher top speed

    More overtaking power

    Lifetime warranty

    Vehicle inspection compliance




    Petrol turbo

    Diesel/ turbodiesel




    Natural gas


    How Surbo feels (by car type)

    Surbo pictures Installation Photos


    What's Surbo ($99)?

    Twin Surbo ($160)

    Surbo5 ($120) for bigger cars


    How Surbo works

    With and without Surbo

    How Surbo can be used

    Higher air compression

    Reduced turbo lag

    Less diesel smoke

    Improved engine vacuum

    Less engine knock

    Longer engine life

    Surbo vs other accessories



    First place (India)

    Runner up (S'pore race)

    Gokart Racing


    Company history

    Surbo's origin

    Reducing CO2 emissions

    During the installation

    Aftersales/ removal

    Transfer (fits most cars)

    Refund policy

    Other applications for Surbo

    Surbo pictures CHAT (+65 9857 2661)

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