10% fuel saving in city driving and more on highways, due to less accelerator pressure required for the same speed.
Higher rpm capability, more torque and bhp over a wider rpm range.
0-100 kph acceleration time cut by 1 second for faster cars and up to 3 seconds for slower cars.
Higher top speed by up to 30 kph for the average 1.6 sedan (as reported by customers).
Less CO2 output due to less fuel required for the same rpm.
For automatic vehicles: instant acceleration from rest with no torque converter slip due to increased torque. Higher rpm possible with 1/2 throttle in D mode to between 4500 rpm and rpm limit depending on gearbox, and quicker changes to lower gears. More info and auto car list..
For manual vehicles: achieving rpm limit with just 1/2 throttle, and even higher rpm if the rpm limit is removed for racing cars More info and manual car list..
For diesel vehicles: better load capability, less diesel black smoke because the accelerator is pressed only halfway for the engine to reach the rpm limit. Helps prevent clogging of particulate filters. More info and diesel car list..
For turbocharged vehicles: reduced turbo lag. More info and turbo car list..
A shortage of air causes automatic gearboxes to shift up too soon, because in a higher gear, less air is required. This also makes downshifts more difficult, as more air is required for higher rpm in a lower gear. So, often the accelerator has to be pressed deeply to allow more air in to induce a gear shift down. The result is wasted fuel, increased emission and foot fatigue for the driver.
When the accelerator is pressed more, the vacuum in the engine manifold drops. However, the vacuum is the force that draws air into the engine. The moment the accelerator is pressed fully, the vacuum is minimized, and air induction force is depleted. Also, with the accelerator on the floor, fuel injected is maximized and over-fueling and even knocking can occur. Acceleration quickly becomes zero for the gear, and a gearchange up is necessary for further acceleration. Acceleration begins to slow significantly from third gear, and in the top gear, the rpm limit cannot be reached. Therefore, the top speed of a typical 1.6 litre sedan is only about 190kph.
By slightly easing off the accelerator for 1 second, a backward air pressure is formed towards the outlet of the Surbo, causing it to spin air internally and jet air at its outlet, compressing the air. Upon subsequent acceleration, the Surbo guides the air to continue jetting and back-pressurizing itself, so that the rpm limit is achieved with just 1/2 accelerator pressure.
When the air is charging between the Surbo and the engine, the engine also puts out exhaust gases of increased pressure, thus helping the exhaust system to blast out the burnt gases from a lower rpm (which aids low end torque). For turbocharged engines, since the turbocharger is driven by the exhaust, the response time of the turbo is reduced so it comes on sooner.
For automatic vehicles, since the Surbo feeds the engine with more air, the engine is allowed to rev higher before changing to a higher gear, and this gives more speed and makes better use of the original engine torque which is maximized at the upper mid range. Similarly, due to more air on standby, downshifts are easier to induce with just a light press on the accelerator. Once the Surbo is on, a second downshift can also be induced for even more acceleration.
Since the accelerator is never floored, a good portion of the vacuum is still present for drawing air into the engine forcefully, so acceleration is extended till the rpm limit is reached. Often, the Surbo-assisted vehicle is so strong that it will reach the rpm limit even in the top gear, and top speeds of 220 kph for 1.6 litre sedans are consistently reported by customers.
As the accelerator never has to be floored, emissions are kept low. All the fuel is used properly either for more acceleration or more mileage.
Above: Photo of Surbo in pipe after the air filter
of Mitsubishi Lancer CS3
Above: Photo of Twin Surbo at air filter
inlet of Perodua Kelisa
Above: Photo of Surbo at air filter
outlet of Hyundai Getz 1.3/ 1.6
Above: Photo of Twin Surbo in outlet of air
filter of Proton Gen 2/ Persona/ Exora
Above: Photo of Surbo at air filter
inlet of Toyota Altis 2007/ Wish
Above: Photo of Surbo in pipe after air
filter of Nissan Latio 1.5/ Sylphy
Source: Original Email Scanned. Not Edited.
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Compression graph of a conventional petrol engine versus one with Surbo
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