Suzuki Swift IV Sport 1.6i – #Etuners Stage1 98RON

Do you remember the amazing little hatch from Suzuki, which first appeared in 2006? 1.6 liters, 125 hp at 6800RPM and 148Nm of torque, 11: 1 engine compression. With a chassi made for cornering and very good steering. The Swift Sport gained a lot of loyal followers for good reasons. Although we were not able to follow and work with it at the time, THP direct injection engines being the reason, it still is a car that we like very much. They still exist and some of them and are in good shape! A few days ago a good friend trusted us with his, wanting to tune it.

If you enjoy detailed work that takes time, tuning a naturally aspirated engine on dyno is one of the most rewarding things you can do. Before we begin, here are the basic rules of the game:

1. Naturally aspirated engines cost a lot to increase their power output. Flow efficiency and combustion efficiency determine that. Because power depends on how well the air flows through them (in engineering we call it volumetric efficiency) and what the power output of the fuel used is. Unless the manufacturer has limited their power via software for a specific purpose (exhaust emissions, fuel efficiency, driveability or for commercial reasons). You need hardware modifications to improve flow.
2. Fuel quality greatly affects results. You can not get as good power with 95RON as that of 98RON or 100RON. The Swift Sport in warm weather will knock at low rpm on its stock tune. This is a strong indication that there is no room for improvement at low rpm. Mid and high rpm is where we focus our modifications in the tune.
3. The only way to analyze and improve the software is through AFR analysis and diagnostics. Trust the car’s sensors, the wideband oxygen sensor and the dyno to do it properly. These show us where the tune can be improved.
4. Use your eyes and ears to tune the car properly. When your sight or hearing detects something abnormal, stop the dyno run and readjust your tune settings.
5. Be sensible. Realistically a stage1 tune can produce and extra 3-4 hp per liter. In case you run into a bad batch of fuel, it may not produce anything at all.

Performance results after our #Etuners Stage1 tune:

The Swift was measured 125.4 hp at 7000RPM with the stock tune and hardware on 98RON petrol. After tuning it, the power went up to 133.4 hp at 7150RPM. We saw small gains in torque since there was no room for improvement up to 5000RPM .

Many thanks to the owner who trusted us with his Swift and was patient enough to wait for the whole process to complete.