If our Stage 1 power or torque figures appear low compared to other tuners' claims, then that's because we want to maintain reliability with the fragile stock turbos. Replacing turbos is an expensive engine-out job and most completely stock V10s have had their turbos replaced at least once. Adding a lot more boost or heat with a performance tune is therefore not recommended. An off-road tune (DPF removal in 2007-2008 Touaregs) may reduce turbo temperature and improve longevity.
For a strong performance gain, upgrading turbos is recommended. We will not tune hybrid turbos, because VNT turbos are tricky to build & calibrate, and the hybrid ones that we have seen so far are not well balanced. Another reason is that hybrid turbos tend to have 100% stock turbines. All they have are larger compressor wheels slapped on. Upgrading the turbine side is very important for reducing heat and improving overall flow. Therefore, use only whole OEM turbos like GTB2260VK. That requires completely custom fabricated exhaust manifolds (click here to see a picture). It is a major project. You will also need to have a good understanding of how to calibrate VNT actuators to ensure that both your turbos behave the same. If you are not prepared for any of that, then we recommend sticking with stock turbos.
Our FlashZilla tool is highly recommended for tuning this engine. Do not use a battery charger while using FlashZilla, because it may disrupt the tune write operation. However, a battery charger at maximum 12.0-13.0v may work.