The V10 is exactly the same for LP560 and R8, changing only the management of butterflies, which the V10 Audi open at 94%, thus preventing deliver all 560 horses.

The butterflies on r8 v10, electronically managed, even with full accelerator pressed not open to 100% but at a lower rate, thus preventing the engine to deliver all the power. Just restore the full opening of butterflies that you obtain the free power of the V10 from R8.