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In addition to the introduction of the all new Verna, Hyundai also unveiled new Gasoline Direct Injection (GDI) engine options and gearbox technology at the Beijing Motor show. First of all is a direct injection version of the Korean manufacturer

I know that the Subaru Legacy and Outback uses the Bosch wideband sensors. Most of the VW use them like the Golf GTI and most of the 1.8T powered ones. Any idea if the lambda sensor can be bought from local stockists?

Reading Lambda or O2 is tricky. I will explain for petrol driven cars. 1. You need 14.7 parts of air to 1 part of fuel to give a burn that is of maximum power. This is in theory only. 2. However on the practical application, you need to inject more fuel for more torque. Because of the fuel nature and cylinder flows, spark flame front etc, you need more fuel for torque and protection. The leaner the burnm, the hotter the gases, the hotter the gases, can your engine components take the heat before a meltdown. 3. There are 2 types of O2 sensors. Narrowband and Wideband. Narrowband is what is commonly installed in our cars. Wideband is for tuning. Narrowband is mentioned can only read from 13 to 15. Wideband can read from 6 to 22. So it can really tune from very rich or very lean conditions. 4. Typical readings of lambda for WOT is, NA:13.5, FI-12.5. Normally these numbers are a lot richer as the manufacturers protect the engine with a rich burn. Experience shows that when you plug a piggyback or aftermarket ECU on a WRX and tune to 12.5 at WOT, it shows significant improvement for economy. 5. Fueling is only part of the power/torque equation of the engine. You need to take care of spark timing. Lambda alone will not increase power or torque. You timing to fire the spark is important.