The Surbo gives more energy, providing maximum acceleration power in low gears and most economy while cruising. The fuel savings can range from minimum zero (during hard sprinting) to over twenty percent depending on where and how you drive, and also how the Surbo improves your car's efficiency, for example, the power-to-load ratio. Most customers report an overall improvement of 10% in economy. The following cars have been made more frugal with Surbo:
| Car | Consumption Before Surbo | Consumption With Surbo | Improvement | Remarks |
| Chevrolet Aveo 1.4 | 12 km/l | l7 km/l | Twin Surbo+cone | |
| Daewoo Espero 2.0 | +3 km/l | 25% | Highway | |
| Daihatsu '89 Charade 1.0 | 10% | |||
| Daihatsu '94 Hijet 1.0 | 7 days | 8 days | GN3168-$25 petrol lasts- | |
| Ford '92 Laser 1.3 carb | 10% | |||
| Honda '89 Civic GL 1.3 | $0.15/km | $0.11/km | 26% | Mostly highway |
| Honda '89 Civic 1.5 GL | 10% | |||
| Honda '89 CRX | 10% | |||
| Honda '03 Jazz | 10-12 km/l | 13-15 km/l | In City | |
| Honda '03 Jazz | 10-12 km/l | 15-19 km/l | Same car, highway | |
| Hyundai Accent 1.3A | 10 km/l | 12 km/l | ||
| Hyundai '96 Accent 1.5 | 15% | |||
| Hyundai '93 Sonata | 10% | |||
| Kia '01 Rio 1.3 | 14 km/l | 16-17.3 km/l | 14-23% | Mostly highway |
| Kia '01 Rio 1.3 | 13 -14 km/l | 14.1-14.2 km/l | Mr Teoh | |
| Kia '01 Rio 1.3 | 13 -14 km/l | 14.4 km/l | Mr Teoh, Twin Surbo | |
| Mitsubishi '93 Colt 1.6 | 12 km/l | 15 km/l | Thomas Yeo | |
| Mitsubishi '98 1.6 MR | 10% | Mike of navy | ||
| Nissan 130Y | 15.5 km/l | ES Fong, KL service centre | ||
| Nissan Presea 1.6 | 9 km/l | 12 km/l | Twin Surbo+cone | |
| Perodua Kancil 660cc | 12.5 km/l | 14.5 km/l | Gordon Goh | |
| Peugeot 206 1.4 | 11.4 km/l | 13.0 km/l | Kenneth Gn | |
| Peugeot '89 405 1.6 carb | 8 km/l | 10.7 km/l | Surbo Development Car | |
| Peugeot '95 405 1.6 MPI | 11 km/l | 12.14 km/l | 10% | 1 Surbo, Development Car |
| Peugeot '95 405 1.6 MPI | 11 km/l | 12.81 km/l | 16% | Twin Surbo, Development Car |
| Proton '97 Wira 1.3 carb | 10 km/litre | 12-13 km/litre | In city | |
| Proton '97 Wira 1.3 carb* | 12-13 km/litre | 14-15 km/litre | On highway | |
| Proton '98 Wira 1.6A | 11 km/litre | 13 km/litre | KH Tan | |
| Seat '99 Salsa 1.0 | 10% | |||
| Subaru '00 Impreza 1.6 | 10-15% | SDG 516 Mr Edwin Wu, 1 Surbo | ||
| Subaru '00 Impreza 1.6 | 25-30% | SDG 516 Mr Edwin Wu, 2 Surbos | ||
| Subaru '92 Justy 1.0 | 15% | Cold tube added-Mr Teoh | ||
| Suzuki Baleno 1.3 | 10% or more | Preacher Xiemushui | ||
| Suzuki Swift 1.0 | 380 km/ 38l | 420 km/ 38l | Rai, airforce tech | |
| Toyota '02 Corolla 1.5 VVTi | 50 more km per tank | Owner, vegetable grocer | ||
| Toyota '92 Starlet 1.0 | 13 km/l | 15 km/l | Alan Tang, ER 9910 K | |
| Toyota Tercel 1.5 twincam | 17 km/l | 19 km/l | +12% | 90-100 km/h, Chile team |
| Toyota Soluna 1.5 | 220 km | 250-260 km | 13-18% | 1/4 tank, Rev Liao |
Economy Tips
Here's how Surbo users can get exemplary economy for their cars. Our general guideline is that maximum torque at the low and mid rpm range go hand in hand with fuel economy, because most of the driving time is spent in these ranges.1. Keep to the factory spec for the overall wheel diameter. This is the size of the rim plus tyres, and if you make the rims bigger, then you can use a lower profile tyre to keep to the original size. You can usually find this size on a sticker on the front door. Likewise, you should use the recommended tyre pressure.
2. In between filter element changes, remove the element and shake the dust off to allow more air in.
3. Have the spark ignition timing tuned to factory spec where adjustable. Also important is the CO (carbon monoxide) emission level--tune by computer to as close to 0% as possible.
4. Top up the battery level, as a lack electrolyte means a smaller store of available electricity, so the alternator has to load the engine more and make it consume more fuel.
5. Straighten and shorten the air intake layout to minimize friction and bend losses. The Surbo should be fitted nearest to and most directly at the throttle (but before any minor air connection to prevent bypass), to get and deliver the maximum back pressure in the air intake. Note: for before-filter installations, although the filter is in the way, these have the advantage of free air before the Surbo, and a pressure-drop analysis will show both cases to be on the same footing.
6. Try to connect to cold air wherever possible, but avoid excessive length, bending or friction in the connecting hoses. These may get you cold air but due to air slowing through these additions, you might be better off not connecting them at all. Therefore when making changes, make sure you monitor the mileage, and do a thing at a time.
7. Adding a boost meter might help, as this helps you get the most engine torque per throttle travel. If you press less, less fuel will be used up.
8. Upgrade to Twin Surbos as these simply have better low end torque and have stretched the mileage on single-Surbo cars. The Twin has been shown by the dynamometer to deliver more torque between 2500-3000 rpm so if you spend more time in that region (eg. during cruising) it will give better economy than the single Surbo.
9. The rate of fuel injected at any moment is proportional to throttle travel x rpm x no. of cylinders. For a given car it must depend mainly on throttle travel (how much you press on the accelerator) and rpm (which you can control via gear selection). Since the Surbo enables rpm red line with half throttle, it means that only a fraction of the fuel normally required for red line is used, so it must be saving fuel during fast driving, compared to flooring the accelerator without the Surbo. The top speed is higher, meaning that cruising is possible with a smaller throttle opening, thus saving fuel. You can thus accelerate faster and get out of the acceleration phase so as to get to cruising speed sooner, thus saving fuel on average. The total consumption is the sum of throttle travel x rpm x time spent in each gear over the journey. Note that it does not pay to shift gears upwards at too low an rpm, as the starting rpm in the next gear may be too low for any power, and you will have to press more on the accelerator, and end up spending more time in the low, uneconomical gears.
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