Since we were going to be doing some pump testing we decided to pick up a couple DW400 pumps to test against the new Walbro 525 and have a shootout. Since the Walbro 450 is the industry standard across all auto platforms we decided it should be used as a baseline for testing.
To give a little back history we never offered the DW400 or even tested one as based on the test data provided by Deatschwerks the flow was marginally better than the Walbro 450 and cost almost double! The smart move would be to run two Walbro 450 pumps as they cost about the same as a single DW400 and flow significantly more then the marketed data Deatschewerks claims for their single pump.
We could literally do a full write up of all the false information shared about the DW400 from “collaborating with Bosch” to false flow data. Last we checked grinding off a part number so people don’t know what it is, isn’t exactly innovative or collaborative.
Sorry we got sidetrack this isn’t DW400 bashing post it is a shootout so let’s see numbers!!