How to improve engine vacuum
There must be no vacuum leaks.
As we fit the Surbo to pressurize an engine, we have to ensure that
there are no openings between the Surbo and the engine. The requirement is that all the air must pass through the Surbo. This forces us to tighten all the vacuum connections, and the result is a perfect vacuum in the intake manifold. A perfect vacuum not only enhances air flow, it ensures the fuel pressure regulator, which is connected to a vacuum tube, is properly controlled. If that tube is loosely connected, the regulator gets a higher absolute pressure signal, and allows more fuel pressure to reach the injectors, and this can cause high fuel consumption.
The usual places where gaps or breaks can occur are the vacuum tubes, or some other air connection such as that to a vacuum or boost gauge with a bad joint that can cause a vacuum leak. Loose vacuum tubes can be tightened with a small cable tie and sealant applied where it is tied. Bigger tubes can be tightened with metal clips. The lower engine oil breather that is connected from the manifold to the oil chamber can also be loose for some cars, as the connection to the oil chamber can be a push-in type. The way to tighten this is to pull the connection out, put some tape around it, push it back tightly into its hole and apply sealant.
Enhanced air suction
Not only that, the air suction (at atmospheric pressure) from the throttle towards the air filter also becomes full, because no gaps are allowed. In fact, we make sure that all the engine's air suction is directed at the air filter itself so that minimal throttle openings are required for acceleration, and a relatively closed throttle means that more of the engine's vacuum is preserved for stronger pickup when needed.
Loose connections include the upper engine oil breather hose, an improperly-designed or badly-fitted air pipe after the air filter, absent clips, and a loose oil dipstick. Often, a less-than-accurate sports-type replica of the filter element may have a poor seal and air can come in through the sides, instead of coming in by the wire mesh in the centre, leading to a drop in air velocity through the air filter.
A very sensitive throttle results from our sealing along the manifold vacuum region and the air channels right up to the air filter, and since the Surbo is also able to press more air into the engine, there are immediate gains in torque and acceleration. Typically, the engine will be able to rev to red line on the rpm meter with just 1/2 throttle, indicating a real improvement in the passage of air, and proof that the vacuum capability of the engine has improved. Also, typical 1.6 litre cars have achieved an extra 30 kph in top speed with the Surbo, largely because the throttle never has to be floored due to the enhanced vacuum. We hope that you can read more about the Surbo and our vacuum-improving installation, and see how the Surbo can benefit your vehicle.
How Surbo transforms your car:
10% fuel saving with mixed driving and more on highways
Faster acceleration, especially from standstill for automatic cars
Higher top speed, which means easier cruising
Higher RPM capability, rev limit possible with just 1/2 throttle!
Instant automatic gear kickdown
Safer, more confident overtaking
Better hill climbing power
Less diesel smoke, even with more speed
Reduced CO2 emissions from vehicles
Money saved, more than from fuel savings
Transferability. Use your Surbo on your next car
Lifetime warranty on both the Surbo and installation
What is Surbo?
The Twin Surbo, 2 Surbos in series for even more low rpm torque
Surbo versus other engine accessories and parts
When the Surbo is most useful
Dynamometer Test Results
How Surbo increases engine compression at low rpm and prevents excessive compression at high rpm
How Surbo increases engine efficiency
How Surbo prevents harmful engine knocking
How Surbo may help your engine so it can last longer
FAQ: Frequently asked questions
How Surbo works for diesel engines
How Surbo's increased air density enhances diesel technology, and raises peak RPM
Diagram: Surbo's effect on the whole vehicle
Diagram: Surbo on petrol turbocharged engines
Diagram: Surbo on diesel engines
Diagram: Surbo on turbo diesel engines
Some vehicles recommended for Surbo
Automatic cars fitted with Surbo
Manual cars fitted with Surbo
Surbo5 for larger engines
Petrol turbo cars fitted with Surbo
Petrol CVT cars fitted with Surbo
Petrol hybrid cars fitted with Surbo
Petrol supercharged cars fitted with Surbo
Natural gas car fitted with Surbo
Diesel and turbodiesel vehicles fitted with Surbo
Motorcycles fitted with Surbo
Photos of Surbos installed in various cars
Why choose Surbo?
Surbo will pass vehicle inspections due to lower emissions
30 day money back guarantee
What happens during the Surbo installation
List of Surbo dealers by country
Buy Surbo online with installation guide, if there's no dealer near you
Join us as dealer for your area
Surbo on racing gokart
Surbo on Honda Civic (runner up in Singapore race)
Surbo wins India race
History of the Surbo company
How the Surbo came to be
Aftersales service and advice, on accessories or compatible vehicles
User guide for Surbo
Automotive engineering and other applications of Surbo
User testimonials (with original source):
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