Deatschwerks DW420 420 L/h E85 Fuel PumpDeatschwerks DW420 420 L h E85 Fuel PumpWhen modifying or rebuilding an engine or for a simple FlexFuel conversion the stock fuel pump is often insufficient and can't let fuel flow through quick enough. The consequences can be disastrous in the worst case a broken engine (a lean air fuel mix causing knocking). The manufacturer's new flagship standard pump the Deatschwerks DW420 can fit in many modern brackets. It is capable of delivering 420 lph at 2.