DPR Upgrade (Audi RS3, 1400HP)

This expansion kit upgrades an Audi RS3/TTRS DPR5 kit by adding a third RACE valve with associated AN fittings + adapters:

Total spray volume capacity is increased by 33% and control response is nearly raised to that of port EFI during the expected operating range. A standard water/meth pump will feed this section 50/50 mixture at 200psi. HAMMER TIME Air Cooler will drop intake air temperatures via separate ECU control. Up to 70% water may be advantageous at maximum boost pressure.

This section is to be activated late in the engine load range and just before timing pull is expected to start with a given fuel type. Spray will vary proportionately with boost pressures, IAT, EGT, and any residual timing irregularity.