I found a pump test online that tests many of the popular pumps including the DW65c. They give a maximum hp flowed which seems to be at a 50psi flow pressure. I dont know how this is determined but would have thought that peak hp would occur at base fuel pressure plus target boost pressure. In many cases this should be close to 63-70psi. The 65c peaked at 718hp, assuming at the crank.

If you reduced the hp figures by 30% for use with e85 then this crank figure will reduce to to 502 hp. Depending on drive line losses I would guess that the 65c will max out at around 430whp.

Have a look and share your thoughts.

Dimensionally the smallest pump in our test, this modest-sized unit surprised us by delivering big numbers. Designed to fit in vehicles like the '08-and-newer WRX/STI, BRZ, and Scion FR-S models, this 320-lph unit at 9.3 V and 50 psi flowed a respectable 249.21 lph and rated at 718.2 BHP. Marketed by DeatschWerks as the world's first 65mm bodied high-performance pump, the DW65C's turbine impeller ensures longevity and is also ethanol compatible.

Read more: Fuel Pump Shootout Part 2 - Fueling For Power