Ok, some guy apparantly thinks the Walbro 190 outflows the Walbro 255.

[supergoat]

Is there any instance or senario where the Walbro 190 will outflow the 255? Some guy I know says the 190 actually outflows the 255, but find this hard to believe.

Any insight on this?

 

[Lunch_Box]

How could a smaller pump out flow a bigger one

 

[jpolizo]

Here's some reasonably good data on pump flow rates. Yes, the 190 could outflow a 255, but not under identical conditions (i.e. if voltage and pressure are identical, the 255 outperforms the 190).

http://www.roadraceengineering.com/fuelpumpflowrates.htm